Sleep Flashcards
where do inhibitory processes associated with sleep arise?
Pons
where does evidence suggest that activity originates?
Reticular Formation
what part of the hypothalamus is involved in sleep inductions?
suprachiasmatic nuclei (SCN)
SCN activity?
stimulates the release of melatonin from the pineal gland
hypothalamus releases an excitatory neurotransmitter?
Orexin (hypocretin) which are required for wakefulness
four main types of patterns on EEG?
Alpha
Beta
Delta
Theta
EEG in relaxed awake state?
high frequency and high amplitude
a-waves
EEG in alert wake state?
high frequency and low amplitude
b-waves
Stage 1 sleep cycle?
slow wave, non-REM sleep
high amplitude and low frequency theta waves
Stage 2 sleep cycle?
no eye movement
bursts of rapid waves called sleep spindles
Stage 3 sleep cycle?
high amplitude and very slow delta waves
Stage 4 sleep cycle?
exclusively delta waves
what stages of sleep are ‘deep sleep?’
stages 3 & 4
what is of note as you go from awake to stage 4 sleep?
increasing amplitude and decreasing frequency
how often does REM sleep happen?
5-30 mins every 90 mins or so
