BRAIN LESIONS - BEHAVIOURAL SCIENCE Flashcards
Temporal lobe lesions are associated with
Impaired memory
Psychomotor seizures
Inability to understand language
limbic system consists of
amygdala
hippocampus
hypothalamus
Poor new learning is associated with lession on
hippicampus
amygdala lesion causes
- Decreased aggression ,
- Increased sexual behavior,
- Hyper orality- (kluver-bucy syndrome )
- Decreased fear response
May become more hunger and leading to obesity or loss of appetite
may cause weight loss involves
hypothalamus
Anorexia - lateral nucleus
Obesity- ventromedial nucleus
frontal lobe lesions
- Mood disorders especially depression
- Problems with motivation
- Concentration
- Attention
- Orientation
- Behavior
- Inability to speak fluently
parietal lobe lesions
Impaired processing of visual spatial information
Impaired processing of verbal information
Visual hallucinations
Illusions
Blindness
occipital lesions
Changes in sleep-wake mechanism is seen in lesions of
Reticular system
Disorders of movement, Parkinson dz (substantia nigra), Huntington dz (caudate & putamen) involves lesions in
basal gaglia
Inability to recognize the faces due to damage to temporal and occipital lobes
Prosopagnosia
principal
inhibitory NT in the CNS.
GABA
Synthesized from glutamate by glutamic acid
decarboxylase( needs Vitamin 6 as cofactor) Helps in the action of Benzodiazepines and Barbiturates in decreasing anxiety.
neurotransmitter knowns to be toxic to neurons associated with
pathophysiology of disorders such as epilepsy,
schizophrenia, Alzheimer’s disease
Glutamate
glutamate is ⬆️in alzheimer’s disease
inhibitory NT-regulates glutamate activity
( primarily in spinal cord)
