PSYC23H3 Lecture 9: PSYC23 LECTURE 9.docx

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Hpa axis has no neural connection so very slow. Voodoo death: fear so much that they die. Brain regulation of heart- there are two distinct vagal nuclei that. When one is stressed out, their immune system gets weird and the person might get sick. Sympathetic adrenal medula : sam- is like pressing a button, to release norephrinephine. Chronic stress: anxiety shift to depression regulates vagal fibres. Newer nuclei used when not really threatened not then . use the dorsal. Away of coping with stress is similar to how older species coped with stress ( hpa/ Everything you do, uses this newer brain stem nuclei. After awhile, if things get out of hand, then you have to use the hpa, if: dorsal vagal nuclei: old part of brain ( if activated then voodoo death) A surge of parasympathetic activity: ventral vagus or nucleus ambiguous. A bundle of nerves that activate all parasympathetic systems.

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