PSYCH 1 Lecture Notes - Lecture 19: East Los Angeles College, Central Nervous System, Autonomic Nervous System
Document Summary
Introduction of the nervous system: central nervous system (cns, brain- interprets sensory events and stores info; sends signals that order movement of muscles and functioning of organs. Cerebral cortex: outer layer of cerebral hemispheres (3mm thick) Memories, plan formulation, perceptions: spinal cord- connects brain and pns, peripheral nervous system (pns, transmit sensory information from body to cns and transmit motor commands from cns to muscles, organs, etc, somatic nervous system. Carries info from senses to cns and controls muscles of movement. Receives info from and sends commands to heart (& other organs) Prepares body to react and expend energy when stressed. Cns composed of two types of cells. Consist of cell body with dendrites and axon whose terminal branches synapse with muscles fibres. Cell body- contains structures that maintain cell metabolism. Axon- transmits message (action potential) away from cell body through neuron to cell it communicates with. Takes in all inputs and either promotes or doesn"t promote the action potential.
