PSY 101LEC Chapter Notes - Chapter 3: Medial Forebrain Bundle, Axon Terminal, Myelin
22 Sep 2018
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(cell body): cell nucleus + chemical machinery. --individual cells to receive,integrate, and transmit information (communication link of nervous system) --throughout the whole nervous system; support neurons; small but outnumber neurons. Functions: neurons; remove neurons" waste product; provide insulation around axons; develop nervous system in human embryo. Inside outside of the neuron is fluid containing electrically charged atoms and molecules ions. Of neurotransmitter molecules in synaptic vesicles: synthesis and storage . --carry commands from central nervous system to muscles. Conditions: afferent nerve fiber + efferent nerve fiber. --controls automatic involuntary visceral functions: heart rate, digestion, perspiration. (computerized tomography) scan: x-ray, horizontal slice of brain structure. (magnetic resonance imaging) scan: magnetic fields, radio waves, computerized enhancement to map out brain structure. (positron emission tomography) scan: radioactive marker, color-coded map for chemical. (functional magnetic resonance imaging): identify areas of high activity. Regulate largely unconscious functions such as breathing and circulation. Relay center for cortex; handles incoming and outcoming signals.
