PSY 101 Chapter Notes - Chapter 9: Circadian Clock, Sleep Spindle, Chronobiology
27 Oct 2018
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Eeg recordings verify that the brain"s auditory cortex responds to sound stimuli even when you sleep. When we are asleep, we process more info outside our conscious awareness. 90 minute sleep cycle: circadian rhythm. Morning types tend to do better in school and be less vulnerable to depression: sleep stages, the sleeping brain remains active and has its own biological rhythm, about every 90 minutes, there are 4 distinct sleep stages: Eyes are closed as the hour goes by and you start to slip into sleep. Slow breathing and irregular brain waves of non-rem state 1: rem sleep, returning through nrem-2, you enter the most intriguing sleep phase, During this, the heart rate rises, breathing becomes rapid and irregular, eyes dart around in momentary bursts. The brain"s motor cortex is active during rem sleep, but the brainstem blocks its messages.
