PSYC 100 Lecture Notes - Lecture 3: Primary Motor Cortex, Peripheral Nervous System, Autonomic Nervous System
15 Mar 2016
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Document Summary
Central nervous system: brain & spinal cord. Peripheral nervous system- remaining nerves: somatic nervous system, autonomic nervous system (ans) Mobilizes body to deal with emergency situations: fight or flight response. Glial cells: provide structural support & insulation for neurons. Neurons: receive info, integrate info, transmit info. Motor neurons: transmit messages to the muscles that move the body. Sensory neurons: receive info from outside the nervous system. Interneurons: receive info from other neurons. Cell body (soma)- contains cell nucleus and produces chemical support for the cell. Dendrites- branch like part of the neurons that receive info. Axons- long, thin fiber that transmit signals away from the cell body to other neurons, muscles or glands. Myelin sheath- insulating material that encases some neurons. Terminal buttons- small knobs at the end of an axon that secrete neuron transmitters. Synapse- junction where neuron interact with one another. * signals in the nervous system travel at 25-200 km/h.
