PSYC10003 Lecture Notes - Lecture 10: Postcentral Gyrus, Papez Circuit, Basal Ganglia
13 Jun 2018
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21st March ‘18
MBB1 Week 4; Lecture 10 Notes
The neural basis of emotion
concept of emotion
-patterns of physiological response & species-typical behaviours
-different patterns associated with different states of feelings
-conscious sense of physiological responses = feelings
-they provide strong motivation to achieve certain goals (evolutionary advantage?)
-anticipate another animal’s intentions
emotions as response patterns:
-behavioural: muscular changes appropriate to situation they’re in
-autonomic: physiological changes from ANS to elicit behavioural response
-hormonal: reinforcing autonomic change
neural control of emotional response patterns
-Bard (1929) = removed cerebral hemispheres/cortexes of cats (decortication)
-cats displayed very aggressive emotional responses in response to simplest simulation
-he removed the hypothalamus = the sham rage disappeared
limbic system of emotion
-number of structures evident on medial surfaces of both cerebral hemispheres
-hypothalamus, anterior thalamus, cingulate gyrus, fornix & hippocampus: “Papez circuit”
-controls emotional expression
-amygdala, orbitofrontal cortex, some parts of basal ganglia added
amygdala
-removal of anterior temporal lobes in monkeys
-Klüver-Bacy syndrome: “psychic blindness”, increased inappropriate sexual activity, oral
exploration of objects, absence of fear
-structure of amygdala:
-medial nucleus: receives sensory input (info from olfactory system), sends info to basal
forebrain & hypothalamus
-lateral/basolateral nucleus: receives sensory input (info from primary sensory cortex,
association cortex, thalamus & hippocampus), send axons to parts of basal ganglia, thalamus,
central nucleus of amygdala
-central nucleus: sends axons to regions of hypothalamus, midbrain, pons & medulla -
responsible - expression of various emotional responses to aversive/threatening stimuli
-basal nucleus: receives axons from lateral & basolateral nuclei, sends axons to other
amygdaloid nuclei & midbrain
find more resources at oneclass.com
find more resources at oneclass.com
Document Summary
The neural basis of emotion concept of emotion. Patterns of physiological response & species-typical behaviours. Different patterns associated with different states of feelings. Conscious sense of physiological responses = feelings. They provide strong motivation to achieve certain goals (evolutionary advantage?) Anticipate another animal"s intentions emotions as response patterns: Behavioural: muscular changes appropriate to situation they"re in. Autonomic: physiological changes from ans to elicit behavioural response. Hormonal: reinforcing autonomic change neural control of emotional response patterns. Bard (1929) = removed cerebral hemispheres/cortexes of cats (decortication) Cats displayed very aggressive emotional responses in response to simplest simulation. He removed the hypothalamus = the sham rage disappeared limbic system of emotion. Number of structures evident on medial surfaces of both cerebral hemispheres. Hypothalamus, anterior thalamus, cingulate gyrus, fornix & hippocampus: papez circuit . Amygdala, orbitofrontal cortex, some parts of basal ganglia added amygdala. Removal of anterior temporal lobes in monkeys.
