NESC 3227 Lecture Notes - Eye Contact, Prefrontal Cortex, Amygdala

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Published on 17 Apr 2013
School
Dalhousie University
Department
Neuroscience
Course
NESC 3227
Professor
February 21st, 2013
February-21-13
1:08 PM
Table 20.4 is WRONG, FUCKING WRONG!!!! DAMNIT!
By that I mean it is incorrect
What are emotions
Not a unitary construct
o A set of processes
Involve visceral/sensory, perceptual, behavioural, cognitive appraisal (thought,
decision making)
o Some processes are conscious, some are not
o There is no one emotion centre in the brain, but multiple brain regions that are networked
and their output is integrated
Audition and amygdala
In humans, when unpleasant sounds are presented, the amygdala is activated
Kawashima et al
Eye contact activated the right amygdala more than the left
o Important in the activation of the amygdala because it is a type of social cue
Bilateral amygdala lesion and personal space
SM has bilateral amygdala lesion
Has no sense of personal space
Fear reaction is also reduced
Fear and amygdala
Ledoux
Removal of amygdala bilaterally in fear conditioning task completely abolished CR, but had no
affect on UR
Laterality of activation
In both hippocampus and amygdala
Procedures
Somerville et al
Neutral expression faces
o Sometime presented alone with just a name
o Sometimes with verbal emotional content (positive, negative or neutral)
Results
o Dissociation found in right temporal lobe
o Greater right than left hippocampal activity during recognition of faces with contextual vs no
contextual information
o Greater right than left amygdala activity during face recognition when the information
contained emotional vs neutral stimuli
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Document Summary

By that i mean it is incorrect. Not a unitary construct: a set of processes. Involve visceral/sensory, perceptual, behavioural, cognitive appraisal (thought, decision making: some processes are conscious, some are not, there is no one emotion centre in the brain, but multiple brain regions that are networked and their output is integrated. In humans, when unpleasant sounds are presented, the amygdala is activated. Eye contact activated the right amygdala more than the left. Important in the activation of the amygdala because it is a type of social cue. Removal of amygdala bilaterally in fear conditioning task completely abolished cr, but had no affect on ur. Neutral expression faces: sometime presented alone with just a name, sometimes with verbal emotional content (positive, negative or neutral) Activated during noxious painful, or empathy for pain: cg25 to be specific. Prefrontal lobes and emotional induction vs cognitive tasks. Emotional tasks seem to be more medial in terms of activation.

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