Unit 2- Sleep Flashcards
Stage 1
Alpha theta
Stage 2
Theta waves end
Delta waves begin
Stage 3 and 4
Delta slow waves
Sleepwalking/talking
REM sleep
Brain awake but relaxed
(Paradoxical sleep)
Parasomnia
Slight disturbances to sleep pattern
Ex: sleepwalking/talking (somnambulism)
Insomnia
Difficulty going to sleep or staying asleep. Caused by stress.
Narcolepsy
Being unable to stay awake. Problem with the nervous system.
Cataplexy
Loss of muscle function
Apnea
Sleeper stops breathing
REM sleep behavioral disorder
Emotional/physical outbursts during dreams
Sleep Paralysis
A state of immobility just before falling asleep or upon awakening.
An overlap between REM sleep and wakefulness
Hypnagogic Hallucinations
Brief vivid sensory phenomena (falling, etc) when trying to sleep
Sleep Spindles
Short bursts of brain activity Stage 2 NREM
K- Complex
Single large spike of brain activity
REM rebound
A person deprived of REM sleep will increase their time spent in REM sleep the next night
One sleep cycle
90 - 120 minutes long
Why do we sleep?
Memory consolidation and restoration
Brain shrinks to allow cerebral fluid to flush out any toxins and clean it
short term to long term memory
