PSY100Y5 Lecture Notes - Lecture 3: Schizophrenia, Hypothalamus, Cerebellum
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PSY100Y5 Full Course Notes
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Document Summary
3 different types of neurons used to receive, conduct and transmit through neurochemical energy: Glia: structural support; white/ gray matter (have shown to play a role in transmitting information) Myelin insulates nerve cell and speeds up conduction of nerve message (10m/second, some well insulated neurons can reach 100m/second) Terminal buttons of the axon release transmitter. Stimulations (excitatory or inhibitory) of the nerve membrane can open ion channels in the membrane. Na+ ions flowing in will depolarize the membrane (movement from-70mv to say -60mv) K+ ions flowing out of membrane will hyperpolarize the membrane (-70mv to say -90mv) Excitatory stimulants open channels in the cell body and sodium ions pour into cell. Kinetic energy is produced from the bouncing of na+ and k+ ions off each other. Inhibitory stimulants do not open channels (hyperpolarize). +40 mv = action potential (electrical energy) After stimulation na+ channels close and k+ channels open a little to allow for homeostasis.
