Biological Psychology

Biological Psychology - BiologicalPsychology 18:57 1....

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Biological Psychology 18:57 1. Cells of the Brain a. Glia a.i. Named for being thought of as the glue of the brain a.ii. Tiny and numerous with many different structures and functions a.ii.1. Astrocytes (star cells) a.ii.1.a. Helps get rid of byproducts a.ii.1.b. Facilitates communication between neurons a.ii.1.c.Holds some glucose Oligodendrocytes and Schwann cells Myelin sheath production (fatty tissue and protein) Helps communication move much more quickly Olig can make multiple segments of myelin sheath Schwann can only make one segment at a time Microglia Tiny Part of the immune system, protects nerves Immune system in the brain is not as strong Radial glia Scaffolding for immature neurons to migrate through body Neurons
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Dendrites Branch like fingers that receive signals from other neurons More dendrite surface area=more info you can process (more thinking) Physical activity can create more dendrites Dendritic spine  increases surface area Happiness associated with more dendrites Soma Body of the neuron Contains all the organelles that perform the functions that keep the cell alive Has nucleus with genetic material Axon Some are covered in myelin sheath (increases action potential) Nodes of Ranvier (naked part of axon) Terminal Buttons End of the neuron Types of Neural Signals Action potential Electrical and chemical signal in axon Occurs down the axon (faster with myelin sheath) Special properties Analogous to ejaculation (all or none)
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This note was uploaded on 02/22/2012 for the course PSYC 101 taught by Professor Loeb during the Fall '08 term at UNC.

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Biological Psychology - BiologicalPsychology 18:57 1....

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