Psychology 2020A/B Chapter 3: chap3nervoussystem2220.docx

• School: Western University
• Department: Psychology
• Course: Psychology 2020A/B
• Professor: mellor

Document Summary

Brings in info - manipulates information assess, process, interpret and relay. Division of nervous system splits in to two. General layout: central nervous system (cns) brain in skull, spinal cord in spin, peripheral ns- everything outside of the brain and spinal cord. All are two stage neural paths = neuron exists cns synapses on a second stage neuron before the target organ . parasympathetic is far from spinal cord but close to organ. Sympathetic increase hear rate, pupils dilate, inhibits digestion , inhibits nasal secretions,, inhibits production of saliva, stimulates sweating, causes pilosecretion, makes lings dilate, increase muscle strength. Parasympathetic; heart slows down, pupils contract, stimulate digestion, nasal secretion, stimulates liver, bladder and kidney, constricts lungs. Sympathetic leaves from thoracic and lumbar before it goes to target organ second stage neurons are far from target organ but close to spinal. Parasympathetic leaves from cranial and sacral (very top and very bottom) and then goes to organ.