Psychobiology of memory and emotion; Neural Mechanisms (L6)

What happens when we stimulate the amygdala?
Produces a fear reaction
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What behaviours do bilateral lesions to the amygdala produce?
Tameness, reduced stress hormines, reduced responsiveness to the threatening stimuli
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What part of the brain does Urbach-Wiethe disease affect?
Bilateral amygdala
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What evidence do Alzheimer's patients show about amygdala degeneration?
The amount recalled of a stressful memory deteriorated in relation to extent of amygdala degeneration, and non-distressing events were not proportional
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What does 'Patient SM' prove about amygdala damage?
Damage to the amygdala means she doesn't display fear where normally needed
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Give an example of electrophysiology findings in regards to amygdala?
LTP is induced in basolateral nucleus of the amygdala following fear conditioning
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Give an example of an fMRI findings in relation to amygdala?
Blood flow to the amygdala increases when presented with picture previously paired with an electric shock
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What does decreased activity in the PFC link to?
Violent behaviour
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What did studies on rats find regarding medial pfc impairment?
Impairs extinction
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What does the pathway of the PFC and amygdala predict?
Higher pathway strength links to lower anxiety
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What does stimulation to the PAG lead to?
Escape behaviours
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Which three areas are therefore linked and what are they responsible for?
PFC feeds in the amygdala to inhibit it or excite it depending on the context, and if there is a fear response the PAG activates a fear response
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What is the name of the syndrome that is resultant of damage to the temporal lobes?
Kluver-Bucy syndrome
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Those who suffer from Kluver-Bucy syndrome experience...
Less expressive facial expressions and vocalisations
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The limbic system comprises of...
Amygdala, hypothalamus, hippocampus
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The removal of the limbic system...
Blunts emotion and stimulation
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Other cards in this set

Card 2

Front

What behaviours do bilateral lesions to the amygdala produce?

Back

Tameness, reduced stress hormines, reduced responsiveness to the threatening stimuli

Card 3

Front

What part of the brain does Urbach-Wiethe disease affect?

Back

Preview of the front of card 3

Card 4

Front

What evidence do Alzheimer's patients show about amygdala degeneration?

Back

Preview of the front of card 4

Card 5

Front

What does 'Patient SM' prove about amygdala damage?

Back

Preview of the front of card 5
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