PSYC 1100 Lecture Notes - Lecture 3: Myelin, University Of Manchester, Spinal Cord

• School: UConn
• Department: Psychological Sciences
• Course: PSYC 1100
• Professor: Topher Logan

Document Summary

Historical perspectives on brain funct: ancient greek, enlightenment philos, 18th-19th c physiologists. 100,000 miles of dendrites (receiver ends of commun. ) Each neuron has processing speed about 1,000 multi/additions per 10 msec) but billions of them. Time (10 msec) for info to pass b/t them. Axon: passes messages away from the cell body 2 other neurons, muscles, glands (only 1) Terminal branches of axon: from junctions w other cells. Neural impulse: action potential, electrical signal traveling down the axon. Myelin sheath: covers the axon of some neurons & helps speed neural impulses. Action potential neural impulse travels down an axon like a wave. Synapse: junction b/t 2 neurons aka synaptic junction/synaptic gap. The receptors on receiving neuron, the chemicals r taken back up into the cell that sent them 2 b used again. Undersupply linked 2 depression: some antidepressant drugs raise serotonin. Msjor excitatory neurotransmitter: has to do w memory tremors & decreased mobil.