PSYCO275 Lecture Notes - Lecture 4: Autonomic Nervous System, Cranial Nerves, Peripheral Nervous System

• School: University of Alberta
• Department: Psychology
• Course: PSYCO275
• Professor: Clayton Dickson

Document Summary

Psyco 275 - lecture #4 - anatomy of the brain. Important to understand between sensing world vs. acting in the world. 2 main division of the nervous system: cns. Nerves located outside the brain and spinal cord. Divisions of the nervous system: afferent (from skin) to efferent (to muscle, division of the peripheral nervous system. Project from middle section of spinal cord. Synapses onto 2nd stage neurons far from target organs. Synapses onto 2nd stage neurons close to target organs. Oppose sympathetic: function of parasympathetic and sympathetic nerves. Adipose cells (fat stores) release fatty acids constrict constrict none. 12 cranial nerves: olfactory, oculomotor, trochlear, abducens, vestibulocochlear, hypoglossal, accessory, optic, trigeminal. Spinal cord: links body -> brain and brain -> body, 2 nerve roots. Neurons get wrapped in a fatty insulation (myelin sheath) to conduct action potentials better (signals faster) Lower level has >afferent and efferent nerves. Protection for cns: 3 layers of meninges (between skull and brain)