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PSYC 100 Ch. 3 Textbook Notes.docx

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University of British Columbia
PSYC 100

PSYC 100 Chap 2 Traditional method Observing electrical activity of the brain through EEG recordings Dalhousies John Connolly used EEG on patient experiencing lockedin syndrome alert patient in an unresponsive body EEG is devised to stimulate certain stimuli A COMMUNICATION IN THE NERVOUS SYSTEM PG 86 behavior depends on rapid information processing information travels instantaneouslyA1 NERVOUS TISSUECells in the nervous system falls into 2 categorieshttpwwwyoutubecomwatchvFR4S1BqdFG4httpwwwyoutubecomwatchvjOkp68kUQvcfeaturerelatedNeuronsGlia literally glue individual cells video shows that neuronsprovides various type of support for neuronsarent connected to each other smaller than neurons receive integrate transmit information outnumber by 101 50 of brains volume consisting glial cells function supply nourishment to neurons remove neurons waste product provide insulation around many axons orchestrate the development of the nervous system in the human embryo may also send and receive chemical signalsmay be implicated in diseases such as amyotrophic lateral sclerosis ALS and Parkinson important role in memory formation gradual deterioration Alzheimers disease play a role in the experience of chronic pain schizophrenia mood disordersbadca Soma cell body contains cell nucleus and much of the chemical machinery common to most cellsb Dendritic Trees Branch Dendrites receive information from many other cellsc Axonlong thin fibre can be a metre long transmits information away from soma to other neurons muscles or glandsd Myelin sheathwhite fatty substance insulate material derived from glial cells that encases some axons the sheath speeds up the transmission of signals that move along axons if deteriorates signals may not be transmitted effectively degeneration of myelin sheaths causes loss of muscle control and seen with the disease multiple sclerosis
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