PSY 101 Lecture Notes - Lecture 8: Positron Emission Tomography, Phineas Gage, Pituitary Gland
19 Feb 2017
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Example: sends signals to the brain for hunger. Neural nets: sets of connections among neurons that together represent information. Lesion: injuries (in this case, to the brain, example: researchers will turn off part of the brain to see what happens and what complications will occur. Example of an accidental lesion in a human: Electroencephalogram (eeg: measure activity and energy in the brain, indirectly look at neurons by blood flow, more blood flow more active. Functional magnetic resonance imaging (fmri: giant magnets that align water molecule density in soft tissue. Benefits of an eeg rather than fmri: faster, a little more natural and comfortable, don"t have to sit still for minutes-hours. Physiological break down of the brain (shared by all vertebrates) Brain stem: bottom and evolutionary oldest. Evolutionary oldest: shared by all vertebrates or most of them: where your brain meets your spinal cord, basic physiological functioning, medulla.
