NROC61H3 Lecture Notes - Lecture 11: Muscle Tone, Orexigenic, Ghrelin
Document Summary
Eeg: noninvasive method for measuring electrical activity of the cerebral cortex, used to diagnoses sleep disorders and epilepsy, signal is a result of thousands of neurons being activated at same time (synchronous activity) Sleep cycle: 7 key stages of sleep, awake, relaxed, rem, 4 non-rem (deep sleep) 5 cycles of sleep (ultradian rhythms) with increasing time spent in rem. 23, 2018: sleep walking occurs in non- Rem while dreams are mostly associated with rem: sympathetic activity increase during rem, cause increase in heart rate, respiration and erections, paralysis also caused due to loss of muscle tone (atonia, eyes remain very active in. Rem and that"s where it"s name (rapid eye movement) comes from: elderly tend to wake more with less deep and rem sleep while children have longer deep sleep. It"s been proposed that both our daily circadian rhythm and homeostatic drive for sleep regulate of sleep (wakefulness = circadian rhythm)
