PSY 1101 Chapter Notes - Chapter 2: Peripheral Nervous System, Central Nervous System, Multiple Sclerosis

• School: University of Ottawa
• Department: Psychology
• Course: PSY 1101
• Professor: Najwa Haddad

Document Summary

Belief that by feeling for bumps, physicians could reveal a person"s mental abilities and character traits. Although inaccurate, highlighted idea that various brain regions have particular functions (localization of function) Each neutron has cell body that has short dendrite bres that listen to info and long axon bres the pass info along. Myelin is shield for axon, when it starts to break away multiple sclerosis develops (i. e. communication to muscles slows with eventual loss of muscle control) Also have glial cells, provide nutrients and insulate myelin. Fluid outside axons are positive, inside axon uids are negative = resting potential . The in ow of positive ions is the neural impulse (action potential) Refractory period (when in ux of positivity is halted) allows neutron to pump the positives back outside to re again. Action potential is reached when excitatory signals exceed the inhibitory signals. Meeting point between neurons is a synapse.