PSYC 375 Chapter Notes - Chapter 4: Hermann Von Helmholtz, Luigi Galvani, Richard Caton

• School: University of Calgary
• Department: Psychology
• Course: PSYC 375
• Professor: Simon Spanswick

Document Summary

Descartes (1664): information carried by csf owing through nerve tubes. Stephen gray (1731):electricity messenger that spreads info through ns charged rod and nose. Luigi galvani twitching of frogs" legs during lightning storm electrical stimulation: passage of electrical current from the uninsulated tip of an electrode through tissue, resulting in changes in the electrical activity of the tissue electrical current to nerve >muscular contraction. Fritsch & hitzig electrical stimulation of neocortex causes movement animals movements of arms and legs in response to stimulation of speci c parts of neocortex. Mary rafferty part of neocortex exposed brain stimulated contraction of left eyelid, unpleasant tingling in right arm, smiled. Richard caton (1900s) measured electrical currents of brain with sensitive voltmeter. Eeg (electroencephalogram) graph that records electrical activity through the skull or from brain and represents graded potentials of may neurons used to monitor sleep stages and record waking activity also to diagnose disruptions (ex. epilepsy)