Psychiatry Flashcards
(147 cards)
A 79-year-old woman with a diagnosis of Alzheimer’s disease is causing concern as she is constantly getting lost on the way back from the local shop to her home, which is only a short walk and one that she has done nearly every day for 20 years. What sort of memory disturbance does this represent?
a) Autobiographical memory
b) Episodic memory
c) Procedural memory
d) Semantic memory
e) Topographical memory
E
Topographical memory loss is failure to orientate oneself.
Autobiographical memory describes specific, personal events such as birthday parties, anniversaries, and holidays. This is also known as explicit memory, or episodic memory.
Procedural memory is also known as implicit memory, such as knowing how to drive, or how to play the piano.
Semantic memory is general knowledge, such as knowing geographical capitals or historical events.
A 72-year-old woman who suffers from Alzheimer’s disease is asked who the Prime Minister was during the Second World War, to which she replies ‘Winston Churchill’. She is then asked where she lived during the war, to which she answers ‘Winston Churchill’. What phenomenon is being described here?
a) Confabulation
b) Déjà vu
c) Ganser’s syndrome
d) Jamais vu
e) Perseveration
E
Perseveration is almost solely seen in organic brain diseases, such as dementia. It isn’t limited to verbal responses, and can be a response to a motor skill.
Confabulation is the phenomenon of false memories leading to incorrect answers, which can be difficult to differentiate from delusions.
Deja but is a sense of familiarity of having encountered something before, even though it is a new event. It can be a feature of temporal love epilepsy, but is also frequently non-pathological.
Ganser’s syndrome is an unusual phenomenon in which people give approximate answers, such as “How many legs does a cow have?” “Five.” It’s also associated with other dissociative symptoms such as fugue, amnesia, and conversion disorder.
Jamais vu is the sense of never having encountered a familiar situation.
A young woman wakes from a nightmare and sees her dressing gown hanging from the door, which she mistakes as an assailant. What is being described here?
a) Affect illusion
b) Completion illusion
c) Pareidolic illusion
d) Tactile hallucination
e) Visual hallucination
A
An illusion is a misinterpretation of a perception, and are not usually pathological. An affect illusion is dependent on current emotional state, as in this scenario.
A completion illusion is when there is a lack of attention and perception is incorrectly interpreted, for example skipping over a misprint in a book.
A pareidolic illusion is a shape being seen in other objects, such as animals in the clouds, or Jesus in toast.
A hallucination is a new perception in the absence of a stimulus. The can be tactile, visual, olfactory, auditory, or taste.
A young man with schizophrenia describes how he can hear the secret service in their base in Finland discussing their plans to assassinate him. What is this phenomenon known as?
a) Extracampine hallucination
b) Functional hallucination
c) Hypnagogic hallucination
d) Hypnopompic hallucination
e) Reflex hallucination
A
Hallucinations are new perceptions in the absence of stimuli. An extracampine hallucination is one that occurs outside the usual range of sensation, in this case, beyond the limits of audibility.
A functional hallucination is experienced only when an external stimulus of the same modality occurs, for example only hearing voices when classical music is playing.
Hypnagogic and hypnopompic hallucinations are those experienced upon falling asleep and waking up respectively, such as the feeling of falling off a cliff when sleeping.
Reflex hallucinations are similar to functional hallucinations but with two different modalities, such as listening to classical music and then having a visual hallucination.
A 28-year-old man is diagnosed with schizophrenia, with the belief that he has been targeted for extermination by a religious cult who have implanted tiny electrical ‘ants’ into his fingernails. When asked when he knew this, he said he had seen a magazine story 3 months ago on ‘retiring to the country’ and immediately felt this was a covert message from the cult that he should be ‘retired’. There was no evidence of delusions prior to this. What is being described here?
a) Autochthonous (primary) delusion
b) Autoscopy
c) Delusional atmosphere
d) Delusional memory
e) Delusional perception
E
Delusional perceptions occur when a normal perception is invested with delusional meaning.
Autochthonous or primary delusions arise spontaneously with no stimulus. Secondary delusions are similar, but are understandable based on the sufferer’s mood or history.
Autoscopy is the sensation of seeing oneself (for example, out-of-body experiences).
Delusional atmosphere or delusional mood is the sensation that something is ‘going on’ without being able to state what.
Delusional memory is when a patient recalls an event and interprets it with delusional meaning.
A 48-year-old man with poorly controlled schizophrenia is admitted to the ward. He appears confused and he is difficult to interview. On asking him why he is in hospital, he replies, ‘Jealousy, the Collaborative, collaborate and dissipate. What’s in my fridge? It isn’t my time.’ How would you describe this type of thinking?
a) Circumstantial
b) Derailment
c) Flight of ideas
d) Pressure of speech
e) Thought blocking
B
Derailment is a type of formal thought disorder in which disjointed thoughts occur with no meaningful connections.
Circumstantial thinking occurs when the person talks about a subject exhaustively with only loosely relevant associations.
Flight of ideas is accelerated thinking with logical associations, but with poor attention and rapidly changing goals of thinking. Pressure of speech is the verbal description of flight of ideas.
Thought blocking is when the patient stops mid-sentence without being able to explain why. It is different to thought withdrawal, in which the patient believes an external agency is removing thoughts from their head.
Which of the following is not a first-rank symptom of schizophrenia as described by Schneider?
a) Delusional perception
b) Persecutory delusions
c) Running commentary
d) Somatic passivity
e) Thought alienation
B
Schneider’s first rank symptoms include auditory hallucinations (often repeating the subject’s thoughts out loud, referring to him/her in 3rd person, or giving a running commentary of thoughts and behaviour); thought insertion, broadcasting, and withdrawal (all by an external agency or body); passivity experiences (the idea that actions, sensations, bodily movements, emotions, or thought processes are generated by an outside agency); primary delusions; and delusional perception.
Persecutory delusions are not a first rank symptom.
The first-rank symptoms are not pathognomic of schizophrenia, and not everyone with schizophrenia experiences first-rank symptoms.
A 72-year-old man with Parkinson’s dementia is seen in clinic. He is asked how he is feeling, to which he replies, ‘I feel fantastic…tic…tic…tic…tic…’. What is the name for this type of speech abnormality?
a) Alogia
b) Dysarthria
c) Echolalia
d) Logoclonia
e) Neologism
D
Logoclonia is often seen in Parkinson’s and describes the last syllable of a word being repeated.
Alogia is extreme poverty of speech.
Dysarthria is a difficulty in manufacturing speech, usually from structural lesions in the vocal cords or brainstem.
Echolalia is repetition of words or sentences, sometimes continuously or incessantly.
Neologisms are new words created by the patient that have specific meanings, usually to do with their delusional beliefs. This is different to metonymy, which is using known words in a different way.
A 26-year-old man is seen by his GP. For the last few months, he has become increasingly concerned about a mole on his cheek, which he feels has got bigger, and people are noticing it more. Over the last week he has become convinced people are laughing at it when he passes them. He has a thought in his head of ‘you’re so ugly, look at the size of that mole’. The patient does not feel he knows where the thought comes from, but it does not seem to be his. He wonders if someone has planted the thought there. The GP does not feel the mole is in any way abnormally sized or has other unusual features. What is the most likely aetiology of these symptoms?
a) Compulsion
b) Delusion
c) Hallucination
d) Rumination
e) Somatisation
B
The intrusive thought that the thought is not his own suggests this is a delusion. A rumination would be recognised as being the patient’s own thought.
A hallucination is a perception with no stimulus.
A compulsion is a repetitive act driven by obsessive anxiety.
Somatisation is a physical symptom as a result of intrapsychic anxiety with no adequate physical explanation.
Which of the following is not a core symptom of depression as defined by ICD-10?
a) Anergia
b) Anhedonia
c) Anorexia
d) Hyperphagia
e) Insomnia
D
The three core symptoms of depression are anergia, anhedonia, and low mood.
Other symptoms according to the ICD10 include low concentration, insomnia, tiredness, low self-esteem, early morning wakening, psychomotor retardation, agitation, loss of appetite, weight loss, and loss of libido.
In atypical depression, symptoms may manifest as hypersomnia, hyperphagia, and weight gain.
A 42-year-old man sees his GP after witnessing a horrific motorway pile-up. For the last 6 weeks he has been experiencing recurrent and intrusive images of the even where he relives what happened, both at night and during the day. At night he is also having vivid nightmares about the crash which is now stopping him from going to sleep. He has not driven his car since, although he himself was not involved in the crash. Every time a car starts he jumps and becomes extremely upset. His mood is low and he feels disconnected from his wife and children and he has been thinking about killing himself. What symptom is not being described here?
A) Avoidance B) Detachment C) Insomnia D) Increased arousal E) Night terrors
E
Night terrors are not nightmares. The subject does not usually remember bad dreams, but awakes confused and terrified, sometimes lashing out, shouting, and screaming.
Avoidance symptoms, detachment, insomnia, and increased arousal (in jumping at the sounds of car engines) are present here.
A 42-year-old man sees his GP after witnessing a horrific motorway pile-up. For the last 6 weeks he has been experiencing recurrent and intrusive images of the even where he relives what happened, both at night and during the day. At night he is also having vivid nightmares about the crash which is now stopping him from going to sleep. He has not driven his car since, although he himself was not involved in the crash. Every time a car starts he jumps and becomes extremely upset. His mood is low and he feels disconnected from his wife and children and he has been thinking about killing himself. What is the most likely diagnosis?
A) Acute stress reaction B) Adjustment disorder C) Depressive episode D) Dissociative fugue E) Post-traumatic stress disorder (PTSD)
E
PTSD diagnosis includes exposure to a potentially life-threatening incident, re-experiencing the event in multiple ways (such as nightmares, flashbacks), avoidance of stimuli that recall the event, and increased arousal (including hyper vigilance, increased startle reaction, insomnia, irritability, anger). PTSD sufferers may also have depressive symptoms.
Acute stress reactions subside within hours or days of a stressful event, and cause panic, disorientation, confusion, and other symptoms of anxiety.
Adjustment disorders are a result of a significant life change (such as bereavement or emigration). They cause depression or anxiety with inability to cope with daily tasks.
Dissociative fugue is a period of amnesia during which the sufferer will travel, often for long distances before coming to, resolving usually within weeks or months. They often appear normal to passers-by.
A 49-year-old woman with schizophrenia is admitted to the psychiatric unit in a mute state. She is staring blankly ahead and not responding to any commands. She is not eating or drinking and looks dehydrated. Which of the following is least likely to be observed in catatonia?
A) Catalepsy B) Clanging C) Echolalia D) Negativism E) Stupor
B
Clanging is a thought disorder whereby words are used based on similar sounds or rhyming, with meaning becoming unimportant. For example ‘ A cat pat on my hat sack, ate the bait and skated.’ Catalonia is a state of either stupor, or excitement. It’s associated with various conditions and various symptoms.
Catalepsy is rigidity of the limbs, with movement into uncomfortable positions being retained. It is not cataplexy, in which there is a sudden transient loss of muscle tone causing collapse.
Echolalia is repetition by sufferers of words spoken to them.
Negativism is a symptom in which catatonic patients do the opposite of what is asked.
Which of the following statements regarding the two classification systems in psychiatry (ICD-10 and DSM-IV) is false? Note this refers specifically to the section in ICD-10 related to psychiatry and mental health.
A) Dementia cannot be classified in either of the two systems
B) DSM-IV uses a multiaxial system
C) Homosexuality is no longer a diagnostic category in the two systems
D) ICD-10 was developed by the World Health Organisation (WHO)
E) The first categories in ICD-10 are those related to organic disorders
A
Dementia is classified in both systems, though not all subtypes are accurately definable.
DSM-IV uses 5 axes: 1 (clinical disorders), 2 (personality disorders and learning disabilities), 3 (acute medical conditions and physical disorders), 4 (psychosocial and environmental factors contributing to the disorder), and 5 (global assessment of functioning). ICD-10 only has a single category per diagnosis.
Which of the following would be the best definition of the term ‘loosening of associations’?
A) A decrease in the amount of words produced by a patient
B) An incompleteness of the development of ideas or thoughts, leading to a lack of logical relationship between them
C) Difficulty in verbalising names of objects, despite being able to describe their function
D) Talking in a roundabout manner before finally answering a question
E) The creation of a new word with particular meaning to the patient
B
Loosening of associations is an incompleteness of the development of ideas or thoughts, leading to a lack of logical relationship between them.
Alogia is a decrease in the amount of words produced by a patient.
Nominal dysphasia is difficulty in verbalising names of objects, despite being able to describe their function, and is seen in organic disorders.
Circumstantiality is talking in a roundabout manner before finally answering a question, seen in hypomanic states.
Neologism is the creation of a new word with particular meaning to the patient, seen in schizophrenia.
A man is admitted to accident and emergency after being found semi-conscious in the street. He is unkempt and does not have any information on his person; he appears to be homeless. In accident and emergency he has a tonic clonic seizure which is self-limiting after 3 minutes. The man is post-ictal for a short time but soon becomes restless, tremulous and sweaty. His speech is rambling, and he complains about the bed sheets being filthy and ‘filled with mites’. He is tachycardic with a BP or 186/114mmHg. What is the most likely diagnosis?
A) Alcoholic hallucinosis B) Delirium tremens C) Cocaine withdrawal D) Diabetic ketoacidosis E) Opiate overdose
B
Delirium tremens is a syndrome caused by alcohol withdrawal in chronic alcohol use or dependency. It’s a medical emergency characterised by autonomic instability, nausea and vomiting, altered mental state, tremor, seizures, and hallucinations. The symptoms appear 6-12h after the last drink and peak at 24-48h.
Alcoholic hallucinosis is another symptom of alcohol withdrawal. It’s quite rare, and involves auditory hallucinations.
Cocaine withdrawal can cause formication, the physical sensation of ants crawling over one’s skin, but does no cause autonomic instability or seizures.
Diabetic ketoacidosis causes severe thirst, abdominal pain, confusion, and decreased level of consciousness.
Opiate overdose causes pinpoint pupils, and respiratory and central nervous system depression.
A man is admitted to accident and emergency after being found semi-conscious in the street. He is unkempt and does not have any information on his person; he appears to be homeless. In accident and emergency he has a tonic clonic seizure which is self-limiting after 3 minutes. The man is post-ictal for a short time but soon becomes restless, tremulous and sweaty. His speech is rambling, and he complains about the bed sheets being filthy and ‘filled with mites’. He is tachycardic with a BP or 186/114mmHg. You order a full set of bloods on this man. Which of the following results would be most indicative of the underlying cause of his delirium?
A) Elevated serum glucose B) Elevated serum potassium C) Low mean corpuscular volume (MCV) D) Low serum vitamin B12 E) Raised platelets
D
Chronic alcohol use causes B12 deficiency due to poor nutritional intake and the toxic effect of alcohol on bone marrow. B12 is used in DNA synthesis, and deficiency leads to impaired erythrocytes metabolism. This causes a raised MCV. Alcohol can also cause thrombocytopenia, hypoglycaemia, and hypocalcaemia.
A 73-year-old woman is admitted to hospital with an infective exacerbation of chronic obstructive pulmonary disease (COPD). Apart from COPD and hypertension, she has no other medical problems. On the third day of her admission, she becomes acutely confused. During the night she is awake, shouting constantly for her husband, claiming that the nurses are prison guards and that they are keeping her against her will. She is slightly calmer the day after. You are the FY1 on call and are asked to come and see her over the weekend as the nurses are worried. It will happen again at night. What should your initial management be?
A) Prescribe clozapine 25mg bd regularly
B) Prescribe haloperidol 2mg intravenously immediately
C) Prescribe lorazepam 0.5mg orally just before bedtime
D) Prescrive lorazepam 0.5mg orally twice daily regularly
E) Prescribe nothing at this stage
E
This is delirium, an acute confusional state characterised by a recognised causative factor, older age, and fluctuating confusion.
Managing delirium is conservative unless the patient is putting themself or others at risk of harm. Management may involve using a side room, reassurance, having prominent clocks and appropriate lighting for the time of day, and treating the underlying cause.
If medication is needed, low dose haloperidol is the most useful, but oral prescription would be adequate, unless refusal occurs. As medications can be a cause of delirium, and worsen it, they should only be used if absolutely necessary. BZDs are second-line agents, but again should only be uesd sparingly. Clozapine is used for treatment-resistant schizophrenia, so is not appropriate here.
Which of the following medications is most likely to be associated with an organic depressive disorder?
A) Prednisolone B) Sertraline C) Thyroxine D) Tramadol E) Tryptophan
A
Prednisolone is a corticosteroid, and may cause mania, psychosis, or depression.
Sertraline may cause a rise in suicidal ideation, however it is debated, and could be a result of side effects such as restlessness (akathisia) rather than an actual organic depressive disorder.
Thyroxine is not associated with depressive disorders.
Tramadol and other opiates are not depressive, and may in fact cause central serotonin release, with antidepressant effects. Augmentation of treatment-resistant depression treatments has been reported with opioid use.
Tryptophan is a precursor of serotonin, and may be used as an augmentation strategy in treatment-resistant depression.
A 27-year-old man is involved in a road traffic accident. During rehabilitation, his family have become very upset as they feel that he has ‘changed’. They report that his concentration is poor and at times he is saying very hurtful things to his wife, which they say is extremely out of character. He has also begun eating large quantities of junk food, whereas before he was extremely fit and careful with his diet. Which part of the brain is most likely to have suffered an injury?
A) Basal ganglia B) Frontal lobe C) Limbic structures D) Parietal lobe E) Occipital lobe
B
Frontal lobe syndromes tend to cause personality changes including an inappropriate or fatuous affect, lability of mood, hypersexuality, hyperphagia, and childishness. There is no insight into the change, and poor concentration may also occur. Forced utilisation is another phenomonen observed, in which patients must use objects in front of them. Primitive reflexes may also be present.
Basal ganglia injuries cause slowing of movement and lack of spontaneity, and increase in obsessional symptoms. Contusions are uncommon, but cerebral hypoxia can injure them.
Limbic injury would result in some kind of amnesic syndrome.
Partietal lobe lesions are associated with visuo-spatial deficits such as agnosias or dyspraxias. Dysphasias may also occur.
Occipital lobe lesions can cause complex visual disturbances, including Anton’s syndrome, in which the patient is cortically blind with no insight, continuing to affirm adamantly that they can see.
A 28-year-old woman is admitted to hospital systemically very unwell, with a reduced level of consciousness, headache, fever, nausea and vomiting, and dysphasia. This is followed by several seizures. initial cerebrospinal fluid analysis shows the CSF is clear, with raised protein, raised mononuclear cell count, no polymorphs, and normal glucose. Her partner says that for the preceding few days she had been acting strangely, seeing things that were not there, accusing him of leaving the gas on and getting very agitated. She then became drowsy and he called the ambulance. Your initial management should be based on which being the most likely diagnosis?
A) Bacterial meningitis B) Herpes simplex encephalitis C) Neurosyphilis D) Sporadic Creutzfeld-Jakob disease (CJD) E) Temporal lobe epilepsy
B
HSV encephalitis tends to target the temporal and orbitofrontal structures, causing unusual behaviour or psychotic symptoms, including olfactory hallucinations (as with the gas in this case). HSV encephalitis has a 70% mortality rate, and IV aciclovir is needed as soon as possible. The CSF is in keeping with viral encephalitis.
Bacterial meningitis would give a turbid or purulent CSF, with high polymorphs, high protein, and low glucose.
Neurosyphilis would be uncommon in a woman of this age, though not impossible.
Sporadic CJD presents with rapid onset dementia with associated mood symptoms, spasticity, and blindness.
Temporal lobe epilepsy seizures are gradual in onset characterised by motionless stares and automatisms. Auras are common and may mimic typical psychotic hallucinations of any modality.
A 76-year-old man with squamous cell lung carcinoma attends accident and emergency with his wife who is his full-time carer. She has become concerned as he has become extremely depressed over the last couple of weeks, along with being extremely thirsty and having little energy. Up until then he was coping very well with his diagnosis. What is the most likely cause of these symptoms?
A) Hypercalcaemia B) Hypocalcaemia C) Hyperkalaemia D) Hypokalaemia E) Hypophosphataemia
A
Hypercalcaemia is a common side effect of cancers. In squamous cell lung carcinoma, it is likely a result of parathyroid-related peptide release causing increased bone turnover, or direct bone invasion. Hypercalcaemia causes kidney stones, bone pain, constipation, depression and confusion. Thirst, nausea, vomiting, and anorexia are also common.
Hypocalcaemia causes peripheral neurological signs, such as hyperreflexia, tetany, paraesthesia, and bruising. Psychiatric symptoms may occur, but with no particular pattern.
Hyperkalaemia causes muscle weakness and fatigue.
Hypokalaemia may cause muscle weakness, fatigue, depression, and anxiety.
Hypophosphataemia usually causes a delirium, with motor problems.
A 14-year-old boy, with no prior psychiatric or medical history, is noted to be seriously slipping in his GCSE coursework, after previously being a Grade A student. He has also started behaving recklessly, going out late whereas previously he had been shy with few friends. He is getting into frequent fights at school. Other changes include the onset of tremor and strange writhing movements in his arms. His mother has also noticed that his skin appears to have taken on a yellow tinge. What is the most likely diagnosis?
A) Huntington's disease B) Multiple sclerosis C) Multiple system atrophy D) Wilson's disease E) Young-onset Parkinson's disease
D
Wilson’s disease is an autosomal recessive disorder of copper metabolism. This causes copper accumulation in numerous tissues, including the liver and CNS. Kayser-Fleischer rings are also observed. Symptoms include liver failure, aggression, reckless behaviour, disinhibition, and sometimes self-harm.
Huntington’s disease is an autosomal dominant movement disorder. It causes accumulation of inclusion bodies leading to cell death in the basal ganglia, substantia nigra, and cerebellum. This results in choreoid and athetoid movements, dementia, and perosnality changes. It usually presents in the 4th and 5th decades of life.
MS is an inflammatory demyelinating disease. It can be episodic or progressive, and is characterised by a wide range of neurological, psychiatric, and cognitive symptoms.
Multiple system atrophy is a are disease of unknown cause, clinicaly similar to Parkinson’s disease, but with more involvement of the putament and caudate nuclei, and no Lewy bodies in the substantia nigra. Dementia does no occur, but sleep disorders and depression is common.
Juvenile PD is rare and similar to PD, but with more dystonia. Depression may occur, and dementia is almost unheard of in younger patients.
Which of the following is the most common psychiatric manifestation following stroke?
A) Anxiety symptoms B) Delusions C) Depressive symptoms D) Hallucinations E) Obsessive-compulsive (OCD) symptoms
C
Prevalence of depression in stroke is around 1 in 3, higher than expected from chronic disease alone, suggesting some organic cause.
Psychotic symptoms may occur in 1-2% of stroke patients. Antipsychotics in patients with co-morbid dementia can increase risk of death, so care should be taken.
Anxiety symptoms are seen in up to 1 in 4 stroke patients.
OCD is rare in stroke.