ANSC 3170 Lecture Notes - Lecture 5: Prefrontal Cortex, Basal Ganglia, Seahorse
12 Feb 2018
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3 main types of biological input; a. b. c. The forebrain is most susceptible to stress and has the most variation btwn age, sex, species a early experiences. Cerebral cortex (includes somato-sensory and motor cortices; visual cortex; associative and pre-frontal) Surface of cerebral hemispheres = cortex; composed of ridges (gyri) and grooves (sulci) Increase neuronal surface area, and the number of neurons in a region. Blood-brain barrier --> bvs lined with tightly-compacted epithelial cells that are mostly impermeable (allows lipid-soluble and small molecules to enter) Three key brain regions that process threats (both learned and unlearned); Behavior: escape/freezing/startle; also learning the best avoidance strategies. Trigger physiological, immunological and neuroendocrine responses as well ies and n is sed on. Trigger physiological, immunological and neuroendocrine responses as well. The hpa axis has a negative feedback on stress response; Mr participates in (-) feedback signaling during the day/night circadian cycle.
