NSCI430 Chapter Notes - Chapter 48: Ventral Lateral Nucleus, Periaqueductal Gray, Walter Bradford Cannon
10 Feb 2017
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Systems that control physiological expression of emotion: endocrine, autonomic motor, musculoskeletal. Subcortical structures that regulate mechanisms: amygdala, striatum, hypothalamus, brain stem. William james: fear is a consequence of emotions: we are afraid because we run , peripheral feedback theory. Walter cannon: lesioned the hypothalamus, found that the hypothalamus is implicated in emotional reactions, sham rage : lack input from cortical areas. Cannon & bard: sensory info processed in the thalamus is sent to the hypothalamus and the cerebral cortex: projections to hypothalamus emotional responses, projections to the cerebral cortex conscious feelings. Papez: signals hypothalamus anterior thalamus cingulate cortex converge with sensory cortex cingulate cortex & hippocampus mammillary bodies of hypothalamus. Paul mclean: emotion is the product of the limbic system: hippocampus = expression of emotion and conscious experience of feelings. Amygdala: one area of the limbic system that had relevance to emotional expression: fear response. Avoidance conditioning: animal learns to perform responses that successfully avoid an aversive shock (us)
