PSYCH 1X03 Lecture Notes - Lecture 4: Naproxen, Hypothalamus, Prolactin
1 Nov 2016
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Subject is awake, eyes open, and concentrating or is excited. Neurons firing in unsynchronized manner, so their contributions to the eeg cancel each other out. Alpha waves: occur when subject is awake, with eyes closed, and not thinking of anything, waves stem from synchronized pulsing of neurons in thalamus and cerebral cortex, large, regular waves. Delta waves: waves that occur in the deep sleep stages, muscle tension, heart rate, and breathing rate decline, slow, irregular, high amplitude waves. Rem sleep: rapid eye movement sleep, most dreams occur in this period, unsynchronized neural impulses, characterized by saw tooth waves and waveforms that have sharp rapid deflections, relaxed muscles, but high arousal (breathing and heart rate up) Why do we sleep: two compatible theories proposed, 1) restoration theory, 2) preservation & protection theory. Restoration theory: h: the body wears out during the day, and sleep is necessary to put it back in shape, intuitive, folk-medicine theory, re-charging the battery".
