PSY 220 Lecture Notes - Lecture 2: Luigi Galvani, Axon Hillock, Bioelectromagnetics
30 Jan 2019
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Document Summary
The axon hillock is the point at which excitatory and inhibitory inputs are generated. Luigi galvani (1791)- studying the anatomy of frog legs with static electricity. The membrane of a neuron maintains an electrical potential, which is the difference in the electrical charge inside relative to the outside of the cell. When the neuron is not active, inside it is -70 m/v. Inside the ion- positive charge anion ion, then a negative high potassium ion, a negative chloride ion, and the finally a positive sodium ion. Selective permeability- allowing some chemicals to pass more frequently than others. Potassium goes downward like water down a stream and sodium channels are closed. The sodium pump is throwing out potassium and bringing in sodium. Electrical gradient- a force acting on ion due to the difference in the electrical charge inside and outside of the cell.
