psych 1a - ch 4 consciousness

consciousness

personal awareness of mental activities, internal sensations, and the external environment

circadian rhythm

cynical fluctuation in biological & psychological processes, lasts about 24 hours

melatonin

hormone manufactured by pineal gland that produces sleepiness

electroencephalogram (eeg)

dominant tool used in sleep research that measures and records brain activity

beta brain waves

brain wave pattern associated with alert wakefulness

alpha brain waves

brain wave pattern associated w relaxed wakefulness

theta brain waves

brain wave pattern seen right before we fall asleep, sleep thinking (parasympathetic)

delta brain waves

brain wave pattern associated with deep sleep

stage 1 nrem

lasts few minutes, gradually disengage from sensations of surroundings, quickly able to regain conscious

stage 2 nrem

true onset of sleep, lasts 15-20 mins

stage ¾ nrem

slow wave sleep, 50%-100% of deep sleep, heart rate, blood pressure, breathing drops to lowest level

sleep walking & night terrors common