PS263 Study Guide - Midterm Guide: Myelencephalon, Anhedonia, Dementia
Document Summary
System: brain (including the 12 pairs of cranial nerves) and spinal cord (both encased in csf) The longest cranial nerve is the vagus. Brings messages from the senses to the cns (afferent) and sends motor signals from cns to the muscles (efferent: the autonomic nervous system: (peripheral) This system is often associated with the 4 f"s: fight, flight and. Brings messages from the senses to the cns (afferent) and sends motor signals from cns to the muscles (efferent) !1: the autonomic nervous system has 2 divisions, the sympathetic branch: Activation leads to: accelerated heart rate, sweating, decreased digestion, secretes. Sympathetic nerves: autonomic motor nerves that project from the cns in the lumbar (small of the back) and thoracic (chest/middle) regions of the spinal cord. Stimulate, organize, and mobilize energy resources in threatening situations: the parasympathetic. Parasympathetic nerves: autonomic motor nerves that project from the brain and.
