Emotion: perspectives from neuroscience - 10 Flashcards
What is involved in the limbic system?
It consists of cingulate cortex, hippocampus, amygdala, mammillo-thalamic tract and anterior thalamus and includes other structures, such as the hypothalamus, in some ‘definitions’.
What is the origin of the term ‘limbic lobe’?
It lies beneath the cerebral hemisphere. Broca (1878) pointed out you can see the same components across species.
What is the Papez circuit of emotion?
originates in the cortex, built up in the hippocampus, transferred to the mammillary body and through the anterior thalamic nuclei to the cortex of the gyrus cinguli.
Evidence - many animals produce sham rage (intense aggression which is poorly directed). Kluver-Bucy syndrome (destroying amygdala in monkeys).
Circuit is also implicated in memory.
What is the effect of localised electrical stimulation of the hypothalamus?
Stimulation of anterior hypothalamus produces sham rage, but stimulation of lateral hypothalamus produces directed rage.
What is evidence for the somatic marker hypothesis?
Clinical evidence using the Iowa gambling task indicates the importance of frontal cortex and amygdala in emotion-related decision making. Participants with damage to either prefrontal cortex or amygdala are impaired in acquiring the task, and also show no anticipatory SCRs.
What is found in fear conditioning in rodents?
In task the rota learns about the relationship between a specific tone and a shock as a result of repeated pairings while in a particular context. Later the animal can be tested with both the cue in its home cage, and in the conditioning context without the cue. In both cases a freezing response provides a measure of recall of the association. Amygdala lesions get rid of contextual conditioning whereas hippocampal lesion effects are confined to context.
What is Panksepp’s emotional arousal systems?
Had 4 primary emotions that he said were related to one another; fear, seeking, panic and rage. Categorised them into positive & negative.
