Case 12 Flashcards

(343 cards)

1
Q

4 central dopamine pathways

A

Mesocortical - VTA to PFC
Mesolimbic - VTA to NAc
Nigrostriatal - Substantia Nigra to Striatum
Tuberoinfundibular - Hypothalamus to Pituitary

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2
Q

Components of limbic system

A

Hippocampus
Cingulate gyrus
Hypothalamus
Anterior thalamic nuclei

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3
Q

Function of limbic system

A

Cortical control of emotion

Storage of memory

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4
Q

Function of prefrontal cortex

A

Planning and executing actions

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5
Q

PFC and limbic system are connected by

A

Cortical-Subcortical-Cortical loops

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6
Q

Connections between PFC and Limbic system are affected by…

A

Major depressive disorder

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7
Q

Schema

A

Pattern of negative thoughts

about self, the world, and the future

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8
Q

Biased attention

A

Negative views about self

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9
Q

Biased processing

A

Negative views about the world

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10
Q

Biased memory

A

Negative views about the future

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11
Q

Areas of the brain which have increased activity in depression (increased metabolism)

A

Hippocampus
Amygdala
Thalamus

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12
Q

Areas of the brain which have decreased activity in depression (decreased metabolism)

A

Prefrontal cortex
Dorsal Anterior Cingulate Cortex
Dorsolateral prefrontal cortex

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13
Q

Dorsal Vs Ventral Anterior Cingulate Cortex

A

Dorsal - Cognitive (connected to prefrontal cortex)

Ventral - Emotional (connected to amygdala and hippocampus)

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14
Q

Function of Ventrolateral PFC

A

Mediator of pain, aggression, libido and appetite

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15
Q

Function of Lateral-Orbital PFC

A

Mediator of maladaptive, perseverative mood states

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16
Q

Function of Dorsolateral PFC

A

Maintains executive function, sustained attention/concentration and working memory

(Hypoactive in depression - appear withdrawn)

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17
Q

Dopamine binds to…

A

D1 and D2 receptors

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18
Q

Noradrenaline binds to…

A

Adrenergic receptors

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19
Q

Excitatory and inhibitory neurotransmitters are… (fast/slow)

A

Fast

Exert effects in less than 1 millisecond

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20
Q

Modulatory neurotransmitters are… (fast/slow)

A

Slow

Take up to minutes but have longer lasting effects

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21
Q

Excitatory neurotransmitters

A

Glutamate
Dopamine (D1)
Noradrenaline
Adrenaline

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22
Q

Inhibitory neurotransmitters

A

Dopamine (D2)
Serotonin
GABA

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23
Q

Tyrosine Hydroxylase

A

Converts Tyrosine to L-DOPA

Requires Fe2+, O2 and BH4

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24
Q

Conversion of L-DOPA to Dopamine requires…

A

AADC enzyme

Vitamin B6 cofactor

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25
Conversion of Dopamine to Noradrenaline requires...
DBH enzyme Vitamin C cofactor Cu2+ cofactor
26
Conversion of Noradrenaline to adrenaline requires...
PNMT enzyme | A methyl donor
27
Where is NA converted to A?
Locus coeruleus Adrenergic neurons and adrenal medulla
28
Where is dopamine converted to noradrenaline?
Noradrenergic neurons
29
Where is L-DOPA converted to dopamine?
Cytosol of dopaminergic neurons
30
Tryptophan Hydroxylase (TPH)
Converts Tryptophan to 5HT
31
Conversion of 5HT to 5-HT requires...
AADC
32
Conversion of 5HT to 5-HT causes release of...
CO2
33
Function of locus coeruleus
Alertness/Arousal | response to stress and panic
34
Locus Coeruleus contains
Noradrenergic neurons
35
Serotonin receptors 1A,B,D,E,F
Activated by triptans
36
Serotonin receptors 2A-C
Activated by hallucinogenic drugs Blocked by atypical antipsychotics
37
5HT3 Receptor
The only ionotropic receptor
38
Serotonin receptors are usually
GPCR
39
Adrenergic system receptors
Alpha 1 = Gq Alpha 2 = Gi Beta = Gs
40
Dopaminergic system receptors
``` D1 = Gs D2 = Gi ```
41
Monoamine hypothesis
Depression caused by a functional deficit in monoamines (esp. 5-HT and NA)
42
Chemical hypothesis
Depression is caused by underactivity/impaired function of monoamines
43
Network hypothesis
Depression is caused by impaired neuronal communication and problems processing information
44
Cortisol concentration in depressed people is...
High
45
Brain-derived neurotrophic factor
Supports neuronal survival in hippocampus, cortex and basal forebrain Low in depression
46
MOA of Imipramine/Nortryptyline/Amitriptyline
TCAs | Inhibit 5-HT and NA reuptake into presynaptic cleft
47
ADRs caused by TCAs blocking mACh receptors
Dry mouth Constipation Drowsiness Blurred vision
48
ADRs caused by TCAs blocking H1 Histamine receptors
Drowsiness | Weight gain
49
ADRs caused by TCAs blocking alpha-1 adrenergic receptors
Dizziness | Hypotension
50
ADRs caused by TCAs blocking voltage-gated Na+ channels
Arrhythmias | Long QT syndrome (Torsade de Pointes)
51
Contraindications of Desipramine/Amitryptyline
TCAs: ``` On adrenergic vasoconstrictors - cause arrhythmias On barbiturates (sedative hypnotics) - cause severe respiratory depression On acetaminophen (paracetamol) - P reduces metabolism of TCA ```
52
Effect of TCAs with adrenergic vasoconstrictors
Can cause arrhythmias
53
Effects of TCAs with barbiturates
Severe respiratory depression
54
Effects of TCAs with acetaminophen (paracetamol)
Paracetamol reduces metabolism of TCA, causing toxicity
55
MOA of citalopram/sertraline
SSRIs | Selectively inhibit reuptake of 5-HT into presynaptic cleft
56
Common ADRs of SSRIs (paroxetine/citalopram)
``` Anxiety Gastric upset Headache Weight gain Nausea and vomiting (overactivation of 5HT3) ```
57
Effect of overactivation of 5HT3 due to SSRIs
Nausea and vomiting
58
Effect of overactivation of 5HT2A in spinal cord and nucleus accumbens due to SSRIs
Sexual dysfunction
59
Notable ADRs of SSRIs (citalopram/fluvoxamine)
Insomnia SSRI dyscontinuation syndrome Sexual dysfunction Increased risk of bleeding
60
SSRI dyscontinuation syndrome
Flu-like symptoms | Changes in sleep, movement, thinking, mood, movement, senses
61
Serious ADRs of SSRIs
Hyponatraemia Increased bleeding Serotonin syndrome
62
Serotonin syndrome
``` Increased temperature Increased reflexes Agitation Tremor Sweating Dilated pupils Diarrhoea ```
63
Drug interactions of SSRIs
SSRIs decrease metabolism of Codeine, benzodiazepines, Erythromycin
64
MOA of reboxetine/atomoxetine
NRIs | Inhibition of noradrenaline reuptake into synaptic cleft
65
ADRs of reboxetine/atomoxetine
NRIs: ``` Anorexia Chills Constipation Dry mouth Headache Insomnia Urinary retention ```
66
MOA of SNRIs (Venlafaxine/Duloxetine/Milnacipran)
Inhibit 5-HT and norarenaline reuptake into presynaptic cleft
67
ADRs of Venlafaxine/Duloxetine
SNRIs: Agitation - tremor, increased blood pressure and heart rate Nausea Diarrhoea Anorgasmia
68
Risk in TCA overdose
Ventricular dysrhythmias
69
Contraindications of venlafaxine/milnacipran
SNRIs: Conditions with high risk of cardiac arrhythmias Uncontrolled hypertension
70
MOA of Moclobemide
Selective Monoamine Oxidase A inhibitor
71
MOA of Phenelzine/Tranylcypromine
Non-selective MAO inhibitor
72
ADRs of phenelzine
``` MAOI: Dry mouth, Constipation, Drowsiness, Hypotension, Insomnia Weight gain ```
73
Interactions of phenelzine
MAOI: Cheese Reaction with foods containing tyramine (beer, wine, aged cheese, marmite) Rage, mania, suicidal behaviour Tyramine = increased release of NA = increased activation of SNS
74
Contraindications of phenelzine/moclobemide
Phaeochromocytoma Cerebrovascular disease Thyrotoxicosis Bipolar Affective Disorder
75
MOA of Buproprion
Atypical | Inhibits Dopamine reuptake and weakly inhibits NA reuptake
76
ADRs of buproprion
``` Atypical antidepressant: Headache Dry mouth Agitation Insomnia ```
77
Contraindications of buprioprion
``` Atypical Antidepressant: Acute alcohol withdrawal Acute benzodiazepine withdrawal Hx of seizures Hepatic cirrhosis ```
78
MOA of mirtazapine
Alpha-2 adrenergic receptor antagonist Also antagonist of 5HT2A and 5HT3
79
ADRs of mirtazapine
Atypical Antidepressant: Dry mouth Sedation Weight gain
80
Why does alpha-2 adrenoceptor antagonism aid in depression?
Presynaptic Alpha-2 receptors are the 'brakes' on noradrenergic neurones. When alpha-2 receptors are blocked, there is no inhibition of NA neurons
81
Why is St John's Wort not prescribed for depression?
Many interactions with conventional drugs due to induction of metabolising enzymes (If StJW is stopped, increase in concentration of interacting drug = TOXICITY) Amount of active ingredient varies between preparations.
82
MOA of ketamine
NMDA receptor antagonist (the glutamate receptor)
83
How does ketamine improve mood?
Blocks action of glutamate. Increased in BDNF - causing synaptogenesis Reversal of cellular atrophy due to stress/glucocorticoids
84
Negative impact of giving exogenous cytokines (interferon-alpha and TNF)
Profound depressive illness
85
Immunological Hypothesis for depression
Raised inflammatory cytokines (The sick role) Modulation of HPA axis Raised cortisol Cortisol is neurotoxic - particularly to hippocampus
86
Singular Nucleotide base Polymorphisms (SNPs)
Variation in a single nucleotide that occurs at a specific position in a genome
87
Copy Number Variants (CNVs)
Sections of genome are repeated and number of repeats in genome varies between individuals in the human population.
88
Penetrance
The extent to which a gene is expressed in the phenotypes of individuals carrying it
89
CNVs with relatively high risk of schizophrenia
VCFS deletion | 3q29 deletion
90
Orexin is released from...
Lateral and posterior hypothalamus
91
Orexin is released in response to...
Low blood glucose | High ghrelin
92
Effect of orexin
Orexigenic
93
Leptin is released from...
Adipocytes
94
Leptin is released in response to...
Stomach distention | Insulin
95
Effect of leptin
Anorexigenic
96
Ghrelin is released from...
Gastric mucosa in stomach and small intestine
97
Ghrelin is released in response to...
Empty stomach | Low blood glucose
98
Effect of ghrelin
Orexigenic
99
PYY is released from...
L cells in colon/ileum
100
PYY is released in response to...
Calorie intake
101
Effect of PYY
``` Anorexigenic Slows peristalsis (to maximise absorption) ```
102
CCK is released from...
I cells in duodenal mucosa
103
CCK is released in response to...
Products of protein an fat digestion in duodenum
104
Effect of CCK
Anorexigenic Slows gastric emptying Emptying of gallbladder (contraction)
105
Why do patients with PWS have increased appetite?
Hyperghrelinaemia (orexigenic) = failed satiety response
106
Areas of brain involved in "Wanting"
VTA Amygdala Ventral Pallidum Nucleus Accumbens
107
Areas of brain involved in "Liking"
Ventral Pallidum | Nucleus Accumbens
108
How does ghrelin stimulate appetite?
Acts on ghrelin neurons Ghrelin neurons send fibres to NYP and AgRP containing neurones Stimulates release of orexigenic peptides Ghrelin neurons also send inhibitory fibres to POMC containing neurones. Inhibits release of anorexigenic peptides.
109
How does leptin inhibit appetite?
Inhibits NYP and AgRP containing neurons. | Stimulates POMC neurons
110
Effect on appetite of 5HT2c activation
Inhibits (activates POMC containing neurons)
111
Effect on appetite of 5HT1b activation
Stimulates (inhibits POMC containing neurons)
112
Somatic syndrome
Loss of appetite and weight loss >5% in one month
113
Symptoms of atypical depression (CRH deficient)
Craving foods high in CHO + weight gain | Hypersomnia
114
Effect of inflammatory cytokines on appetite
Decreases appetite
115
3 Key aspects of storm and stress in adolescence
Conflict with parents Mood disruptions Risk behaviour
116
Onset of adrenarche in females
6-9yrs
117
Onset of adrenarche in males
7-10yrs
118
Adrenarche
Activation of HPA axis Zona reticularis to produce androgens Results in secondary sexual characteristics and changes in sweat glands
119
Onset of gonadarche in females
8-14yrs (11 mean)
120
Onset of gonadarche in males
9-15yrs (12 mean)
121
Gonadarche
Reactivation of hypothalamic-pituitary-gonadal axis. Pulsatile release of GnRH during sleep. FSH and LH release from A. Pituitary. Gonadal steroid release - oestrogen and testosterone.
122
3x Endocrine events during puberty
Adrenarche Gonadarche Activation of growth axis
123
Age of pubertal growth spurt in females
12yo
124
Age of pubertal growth spurt in males
14yo
125
Function of testosterone in puberty
Develop neural circuitry for typical male behaviour | Defeminisation
126
Behavioural effects of sex steroid hormones (Oestrogen and testosterone)
Reproductive behaviours Reorganisation of sensory and association regions Motivation and reward behaviour
127
Area of the brain responsible for reproductive behaviours
Hippocampus
128
Areas of brain responsible for motivation and reward behaviour
Nucleus Accumbens | Dopaminergic pathways to PFC
129
Effect of early life stressors on the brain
Neuronal atrophy due to chronically high cortisol | Leads to dysregulation of HPA system
130
Pruning
Elimination of rarely used neural connections in the brain to make it more efficient. Occurs during adolescence
131
Grey matter maturation occurs in.... first, then ....
Motor and sensory systems first Then frontal, parietal and temporal cortices (involved in integrating primary function)
132
Maturation of PFC during adolescence results in...
Greater control of thoughts and behaviour Long term planning Self evaluation
133
Improved connectivity between PFC and limbic system during adolescence results in...
Improved decision making Better risk and reward system
134
Average age of schizophrenia onset
15-25 yrs
135
Circadian rhythms
Occurring over approximately one day | Includes changes in temperature, heart rate, respiration rate and metabolism.
136
Ultradian rhythms
Occur over less than one day | e.g. passing through different stages of sleep
137
Infradian Rhythm
Occurs over more than 1 day | e.g. menstrual cycle
138
Stage 1 of sleep
Alpha waves 8-12 Hz Low amplitude, moderate frequency. Drowsy wakefulness (Wakes immediately if aroused)
139
Stage 2 of sleep
High amplitude Slower frequency K complexes Sleep spindles (More difficult to arouse than stage 1)
140
K complexes
Unique to stage 2 of sleep Suppress cortical arousal Aid sleep-based memory consolidation
141
Sleep spindles
Unique to stage 2 of NREM sleep | Immediately follow muscle twitching
142
Stage 3 of sleep
Delta waves appear (1-2Hz) Large amplitude, Low frequency Decreased breathing, heart rate and body temperature)
143
Stage 4 of sleep
Dominated by delta waves
144
Bruxism
Jaw clenching
145
Hrs of sleep for a baby
16
146
Hrs sleep for children
9-16
147
Hrs sleep for teenagers
9
148
Hrs sleep for adults
7-8
149
Why is muscle tone lost in REM sleep?
Alpha motor neurons inhibited
150
Vital signs in REM sleep... | Because...
Increased blood pressure, respiration and heart rate Because sympathetic NS is partially activated
151
Blood flow to the brain during REM sleep
High blood flow to visual cortex - due to complex visual material in dreams. Low blood flow to inferior frontal cortex - poor temporal organisation and bizarreness)
152
What is the effect of shutting down the frontal cortex during REM sleep?
Limbic system no longer inhibited Limbic system involved in emotion, motivation, long term memory and olfaction
153
Effect of activity in noradrenergic neurons on REM sleep
Inhibits REM sleep
154
Effect of activity in 5-HT neurons on REM sleep
Inhibits REM sleep
155
Effect of activity in cholinergic neurons on REM sleep
Promotes REM sleep
156
Seasonal Affective Disorder
Increased melatonin release from pineal gland during darkness. Melatonin causes sleepiness. Leads to severe disruption in mood.
157
Preferred phase shift pattern of sleep
Day shift Evening shift Night shift i.e. Delay > Advance
158
Morning melatonin causes...
Delay (go to sleep later - when it is dark in the morning)
159
Afternoon melatonin causes...
Advance (go to sleep earlier - when it is dark in the afternoon)
160
Evening melatonin is...
Ineffective
161
Zeitgebers
Cues in the regulation of the body's circadian rhythm e.g. Light
162
Initiation of sleep
Activity in serotonergic neurones. Decreased activity in reticular formation and cortex. Allows sleep to be initiated.
163
REM sleep is initiated by..
Activity in noradrenergic neurons
164
Melanopsin
Photopigment found in light sensitive retinal ganglion cells
165
SCN retains its cyclicity when maintained in vitro, therefore....
It can be transplanted - sets the rhythm of the donor animal in the receiving
166
How does the body respond to sleep deprivation?
Increases slow wave, NREM sleep (stages 3 and 4) | Decreases REM sleep (satisfying sleep)
167
Why is NREM sleep less satisfying?
Areas of the brain involved in memory consolidation and retrieval are not shut down.
168
Serotypes associated with low hypocretin levels in CSF
HLA DR2 and DQ1
169
Patient enters REM sleep almost immediately after starting a daytime nap. This suggests...
Chronic sleep deprivation
170
Multiple sleep latency test (MSLT)
Measure time elapsed from start of a daytime nap to the first signs of sleep. Used in diagnosis of sleep disease.
171
Hypocretin
Neuropeptide that regulates arousal, wakefulness and appetite
172
Serotypes associated with Narcolepsy
HLA DR2 and DQ1 Cause a reduction in hypocretin in CSF
173
Narcolepsy is caused by...
Destruction of cells that produce hypocretin | Therefore, reduction in levels of hypocretin in CSF
174
Symptoms of narcolepsy
Excessive daytime sleepiness Falling asleep suddenly, without warning Sleep paralysis (unable to move or speak when waking or falling asleep)
175
Treatment of narcolepsy
Modafinil - daytime Sodium oxybate - at night Education Psychology
176
MOA of Modafinil
Inhibits DA reuptake Activates glutamatergic circuits Inhibits GABA *Promotes wakefulness* Used in narcolepsy.
177
Sodium Oxybate
A metabolite of GABA. Taken at night by narcolepsy patients.
178
Cataplexy
Sudden muscular weakness caused by strong emotions.
179
Symptoms of cataplexy
Jaw drop, head slump, leg collapse, slurred speech, double vision etc. Triggered by strong emotion e.g. laughter, anger, surprise
180
Treatment of cataplexy
Gamma-hydroxybutyrate (CNS depressant) Antidepressants
181
Gamma-hydroxybutyrate (GBH)
CNS depressant used to treat cataplexy. Active ingredient is Sodium Oxybate, a metabolite of GABA.
182
Benign Rolandic Epilepsy
Partial epileptic seizures during sleep, causing a reduction in REM sleep.
183
Sleep disorders often seen in people with epilepsy
Narcolepsy Sleep apnoea Restless leg syndrome Night terrors
184
Sleep deprivation and epilepsy
Sleep deprivation often causes seizures in people with epilepsy.
185
Drugs which induce an unnatural sleeping pattern...
Morphine Barbiturates Benzodiazepines
186
What is the effect of drugs which induce an unnatural sleeping pattern?
Reduction in REM sleep | Patient will appear drowsy on waking
187
Drugs which induce a natural sleeping pattern..
Melatonin | Tryptophan
188
Use of melatonin in hospitals
Used to promote a natural sleeping pattern. Can be used for a maximum of 2 weeks.
189
Napping rules for good sleep hygiene
Avoid napping during the daym particularly after 3pm. | Limit naps to 1 hour
190
Role of astrocytes in blood brain barrier
Formation and maintenance of tight junctions between cerebral endothelial cells.
191
Role of pericytes in the blood brain barrier
Secrete proteins to contribute to basal membrane
192
Area postrema is located..
In medulla
193
Area of brain that lacks a blood-brain barrier
Area Postrema
194
Function of area postrema
Controls vomiting Fenestrated capillaries allow small molecules to enter brain. Chemoreceptors detect toxins in the blood and trigger vomiting.
195
MOA of valproate
Sodium channel blocker | Increases GABA in the brain
196
Indications for valproate
Bipolar Epilepsy Migraine
197
SERT
Serotonin transporter
198
Definition of clinical anxiety
Preparation for danger in the absence of an immediately threatening stimuli
199
Cognitive component of emotional memories occurs in..
Hippocampus
200
Emotional component of emotional memories occurs in...
Lateral nuclear complex of Amygdala
201
Panic disorder
Discrete episodes of intense anxiety accompanied by somatic symptoms
202
Glutamic acid Decarboxylase
Converts glutamate to GABA
203
Structure of GABA-A receptos
Pentamer B2, a1, B2, a1, G2
204
GABA-A is selectively permeable to...
Cl-
205
Function of GABA-B channels
Inhibit voltage gated Ca2+ channels Inhibit Adenylyl Cyclase Open K+ channels (hyperpolarisation)
206
CRF/CRH neurons are found in the....
Hypothalamic periventricular nucleus
207
Patients with anxiety have (high/low) GABA in the cortex
Low
208
Treatment of acute anxiety attacks
Benzodiazepines with sustained action: | Diazepam, Alprazolam, Chlordiazepoxide, Clobazam
209
Active metabolite in diazepam
Nordazapam
210
ADRs of benzodiazepam
Drowsiness, Confusion Retrograde amnesia Impaired coordination
211
How does ethanol exert its anxiolytic effects?
Facilitates GABA-mediated GABA-A receptor Cl- channels
212
Long acting benzodiazepines
Diazepam, | Chordiazepoxide
213
Short acting benzodiazepine
Lorazepam | Temazepam
214
Indication for propanolol in treatment of anxiety
When physical symptoms such as sweating, tremor and tachycardia occur
215
MOA of buspirone
5-HT1A receptor agonist
216
Indication for buspirone
Generalised anxiety disorder
217
ADRs of buspirone
Nausea Dizziness Headache Nervousness/Excitement
218
Contraindications of buspirone
Epilepsy | Acute porphyria
219
Paranoid schizophrenia accounts for... of all schizophrenia
40%
220
Disorganised schizophrenia
Disorganised speech and behaviour | Find it hard to do every day tasks
221
Catatonic schizophrenia
Abnormal movement or behaviour
222
Undifferentiated schizophrenia
Mixture of different type of schizophrenia
223
Residual schizophrenia
History of episodes | No current symptoms
224
Effect of activation of D1 receptors
Activates Adenylyl Cyclase
225
Effect of activation of D2 receptors
Inhibits Adenylyl Cyclase
226
D1 type D1 receptors are localised to...
Nucleus Accumbens Hypothalamus Thalamus Frontal cortex
227
D1 receptors are localised to.. D2 receptors are localised to...
D1 - Mesolimbic pathway D2 - Mesocortical pathway
228
Dopamine Theory of Psychosis
Psychosis is caused by dysregulation of dopaminergic pathways. Overactive mesolimbic pathway (D1 - Gs) causing positive symptoms Underactive mesocortical pathway (D2 - Gi) causing negative symptoms
229
Glutamate Theory of Psychosis
NMDA hypofunction Causes decreased activity in mesocortical pathway (D1) causing negative symptoms Causes increased activity in mesolimbic pathway (D2) cauing positive symptoms.
230
MOA of chlorpromazine
Dopamine receptor antagonist (non-selective)
231
MOA of Haloperidol
Dopamine receptor antagonist (higher affinity for D2 than D1)
232
Extrapyramidal symptoms of chlorpromazine and haloperidol resulting from D2 blockade of extrapyramidal system
Acute dystonia Tardive kinesia Akathisia
233
Acute Dystonia
Sudden and spastic contraction of muscles, often in face and neck. Caused by blockade of D2 receptors in extrapyramidal system.
234
Oculogyric Crisis
Prolonged, involuntary, upward movement of the eyes | A form of acute dystonia
235
Tardive dyskinesia
Involuntary, abnormal movements e.g. Oro-buccal-facial causing tongue movements and excessive blinking Caused by D2 blockade in extrapyramidal motor system
236
Akathisia
Subjective sense of anxiety and restlessness | Caused by D2 blockade in extrapyramidal motor system
237
ADRs of conventional antipsychotics
``` Sedation Dry mouth Blurred vision Urinary retention Constipation ``` + Acute dystonia Tardive kinesia Akathisia
238
Main ADRs of chlorpromazine
``` Increased prolactin (gynaecomastia) Hypothermia Anticholinergic effects Hypersensitivity reactions Obstructive jaundice ```
239
Main ADRs of haloperidol
Increased prolactin (gynaecomastia) Hypothermia Anticholinergic effects (fewer than chlopromazine) Hypersensitivity reactions
240
MOA of clozapine
Atypical | Antagonist of dopamine, serotonin (5-HT2) and other monoamine receptors
241
ADRs of clozapine
``` Seizures Salivation ACh effects (dry mouth, constipation) Weight gain Hyperlipidaemia Hyperglycaemia Risk of agranulocytosis ```
242
MOA of newer atypical antipsychotics
5-HT2A blockade (higher affinity for 5-HT2A than D2) Examples: Risperidone, olanzapine and quetiapine
243
ADRs of risperidone
Weight gain Hypotension Hyperprolactinaemia
244
ADRs of olanzapine
Weight gain Hyperlipidaemia Hyperglycaemia
245
ADRs of Quetiapine
Sedation/Drowsiness Tachycardia Weight gain Constipation
246
MOA of caffeine
A2 purine receptor antagonist | Partial phosphodiesterase inhibitor
247
MOA of amphetamines
Inhibit of reuptake of monoamines into presynaptic membrane | Increases dopamine release
248
Effects of amphetamines
``` Euphoria Insomnia Increased stamina Anorexia Increased blood pressure Decreased GI motility ```
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MOA of cocaine
Inhibits catecholamine reuptake Increases firing of 5-HT in mesolimbic pathway Decreases 5-HT firing of neurons in dorsal raphe nuclei
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Physiological effects of cocaine
Tachycardia Vasoconstriction Increased blood pressure
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MOA of MDMA
Inhibits 5-HT reuptake | Stimulates 5-HT release
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Effects of MDMA
Psychostimulant | Empathogenic
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MOA of LSD
Mimics 5-HT | Agonist of 5-HT2A receptors
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Effects of LSD
Alters perception by affecting how the retina processes information and conducts it to the brain (Psychotomimetic)
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MOA of cannabis
THC acts on CB1 receptors in brain and CB2 receptors in peripheral tissues. Inhibits GABA release Therefore, dopamine released from Nucleus Accumbens
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How do opiates cause euphoria?
Mu-opioid receptor agonist | Acting on receptors in the limbic system
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Side effects of opiates
Constipation | Respiratory depression
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Structures in brain responsible for opiate tolerance
Ventral Tegmental Area | Nucleus Accumbens
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Structures in brain responsible for opiate withdrawal
Locus coeruleus | Noradrenergic neurones in brainstem
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Pre and perinatal insults associated with schizophrenia
Low birth weight | Obstetric complications and infection
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Markers of neurodevelopmental disorder associated with schizophrenia
Cognitive impairment | Motor delay
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Brain changes at onset of schizophrenia
Enlarged ventricles | Reduced grey matter
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Contraindications of clozapine
``` Cardiac disorders Hx of neutropenia/agranulocytosis Bone marrow disorder Alcoholic and toxic psychosis Uncontrolled epilepsy ```
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Pharmacological control of ADRs of clozapine
Aripiprazole | Metformin can also be used to control weight gain
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Effects of Aripiprazole
Reduces weight, serum cholesterol and triglyceride levels. | Used in conjunction with clozapine to reduce its side effects.
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Eye Movement Desensitisation and Reprocessing (EMDR) is used for...
PTSD
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Exposure and Response Prevention (ERP) is used for...
Certain anxiety disorders e.g. OCD
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Dialectical Behavioural Therapy (DBT) is used for...
Personality disorders Substance use Self Harm
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Functional Analytic Psychotherapy (FAP) is used for...
An alternative to CBT, Depression Anxiety disorders Bipolar
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Hallucinations can be...
``` Auditory Visual Tactile Olfactory Gustatory ```
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What are delusions?
Abnormal thoughts Beliefs that do not form part of the person's culture. Fixed, usually paranoid and persecutory in nature.
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Thought disorder/Confusion is...
Trouble organising thoughts logically, making up meaningless words, feeling as though thoughts are being removed (thought blocking)
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Insight (a symptoms of schizophrenia)
Subject of delusion is believed to be true with 100% conviction
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The 5As - Negative Symptoms of Schizophrenia
``` Affective flattening Alogia Avolition/Apathy Attention Anhedonia ```
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Alogia
Poverty of speech (reduction in amount of speech)
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Anhedonia
Loss of interest in and pleasure from previously rewarding activities
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Avolition/Apathy
Lack of motivation and interest in goal directed behaviour
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Affective flattening
Diminished range of emotional expressiveness
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When Px in clozapine are quitting smoking they must...
Have their daily dose of clozapine monitored by the psychiatrist. Since nicotine is an enzyme inhibitor. Drastic reduction in smoking could produce toxic effects.
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OCEAN (personalities)
``` Openness Conscientiousness Extraversion Agreeableness Neuroticism ```
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Temperament inventory
Novelty seeking Harm avoidance Reward dependence Persistence
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Character inventory
Self-directedness Cooperativeness Self-transcendence
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Thought components assessed in MSE
Content Process Flow Form of thought
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Form of thought is circumstantial...
Long-winded
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Form of thought is tangiential...
Loses goal direction
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Neologism
Making up new words
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Knight's Move/Derailment
Discourse consisting of a sequence of unrelated or only remotely related ideas
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Distortions
Hyperaesthesia (excessive physical sensitivity) Vivid sounds and colours Seen in mania and autism
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Illusions
Real stimulus False perception e.g. "I saw a man down a dark alley"
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Hallucinations
No stimulus False perception Can be in any sensory modality
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Pseudohallucinations
Voices heard within mind Involuntary Internal Seen in personality disorder
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Echo de la Pensee
Own thoughts spoken aloud
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"In external space"
Speaking in 2nd or 3rd person
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Depersonalisation
Feeling detached from your own body and sense of self Seen in anxiety, sleep deprivation, sensory deprivation, drug intoxication
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Derealisation
Feeling that everything around you is not real (is plastic, or has a "movie quality") Seen in anxiety, sleep deprivation, sensory deprivation, drug intoxication.
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Parts of MSE (7)
``` Appearance/Behaviour Speech Mood/Affect Perceptions Thoughts Cognition Insight ```
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Confabulation
Lying without meaning to (Wernicke-Korsakoff's)
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Insight
Level of understanding exhibited in relation to symptoms. Do they attribute symptoms to mental disorder? Accept the need for treatment?
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Fugue
Loss of awareness of identity
300
Dissociative Conversion Disorder
Patients present with numbness/blindness/paralysis with no organic cause
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Secondary delusions
Understandable in the context of their emotional state e.g. low self esteem - believe they are responsible for a crime
302
Secondary delusion of persecution
"Someone is trying to kill me"
303
Secondary delusion of grandiosity
"I am the new messiah"
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Secondary delusion of nihilism
"I am already dead"
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Delusional perception
Perception is normal but has been interpreted delusionally
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Delusions of thought interference
Insertion, withdrawal, broadcasting i.e. someone is putting thoughts in their head
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Delusions of passivity
Affect, impulse, volition Someone is making them do what they are doing
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Core symptoms of unipolar depression
Low mood Anhedonia Anergia
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Type 1 Bipolar Affective Disorder
One episode of MANIA | Other episodes of depression/hypomania/mixed affective state
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Type 2 Bipolar Affective Disorder
Episode of hypomania Other episodes of depression (more depression than type 1, more suicidal acts) NO MANIA or mixed affective state
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How does mania differ from hypomania?
Mania is more severe and completely disruptive in daily life. Hypomania lasts for a few days Mania must last for at least one week.
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Symptoms of somatic syndrome
``` Anhedonia Early morning waking Psychomotor agitation/retardation Loss of appetite Weight loss Loss of libido ```
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Incidence
Number of new cases in a population over a period of time
314
Prevalence
Proportion of people in the population with the condition
315
Cotards Syndrome
Person believes that they are already dead | Seen in psychotic depression and dementias
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Electroconvulsive Therapy
Induction of Generalised Tonic Clonic Seizure by an electric current under general anaesthetic
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Risks associated with ECT
Short term memory impairment | Risks associated ith repeated general anaesthetic (1/5000 deaths)
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Dysthymia
Persistent mild depression
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Cancer with the highest risk of depression
Lung (13.1%)
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How doe stress cause deterioration in cancers?
Stress results in release in TNF-alpha TNF-alpha inhibits activity of tyrosine phosphatase Reduced expression of MHC II Malignant cells escape immune surveillance
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Treatment for depression in cancer patients
SSRIs | SNRIs if SSRIs are ineffective
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Features of PTSD
Avoidance of reminders Flashbacks/Nightmares Negative cognitions (guilt, numbing, shame, anger) Hyperarousal
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Brain structures affected by PTSD
Hyperactive amygdala and insula Hypoactive mPFC and rACC
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Self-stigma
Fear or shame that an individual might have that they and their condition will be negatively viewed
325
Enacted stigma
When a person or group is shunned, denied protection under the law or dehumanised
326
MOA of Fluoxetine
SSRI
327
ADRs of fluoxetine
Dose-related abdominal pain Constipation Nausea GI disturbance
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Contraindications of fluoxetine
In manic phase of BPAD Cardiac disease Epilepsy
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MOA of Lorazepam
Benzodiazepine | Acts on GABA-A receptors causing an opening of Cl- channels
330
ADRs of lorazepam
Amnesia Confusion Ataxia
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Contraindications of Lorazepam
If respiratory weakness Chronic psychosis Sleep apnoea
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Indications for fluoxetine
Depression and anxiety disorders
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Indications for lorazepam
Anxiety and sleep disorders | Status epilepticus
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MOA of moclobemide
Selective MAO-A inhibitor
335
Indications for mocolobemide
Depression Anxiety Psychosis
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ADRs of moclobemide
``` Confusional states (agitation) Dizziness Dry mouth Drowsiness Weight gain Hypotension Insomnia ```
337
Contraindications of moclobemide
Thyrotoxicosis | Bipolar (may trigger manic episodes)
338
MOA of Amitryptyline
TCA Limits 5-HT and NA reuptake Also blocks voltage gated Ca2+ channels in CNS
339
ADRs of amitryptyline
Abdominal pain Restlessness Fatigue Hypertension
340
Contraindications of Amitryptyline
Cardiac arrhythmias Acute porphyria In manic phase of BPAD
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ADR which is present in all antipsychotics
Prolonged QT interval
342
Structural stigmatisation
The belief that mental health services and research don't deserve as much funding as other health problems
343
Adjustment disorder
Temporary condition caused by stress - display some symptoms of clinical depression without as many physical/emotional symptoms e.g. sleep and appetite changes