State of Consciousness: Sleep Flashcards
Sleep facts
All mammals can sleep and dream
Humans spend 1/3 of their lives sleeping
Polysomnography
A comprehensive examination of neuro-physiological changes that occur during sleep episodes
(All the measurements, along with respiratory rates, and body temp)
How we measure sleep
EEG (electonencephalograph)
Measures brain wave activity
Associated with the different stages of sleep
EOG (electoocculograph)
Measure ocular(eye) activity Associated with the different types of (NREM/REM) sleep
EMG (electromyograph)
Measures muscle tension
associated with the different stages of sleep
Body temp
Controlled by the biological clock
Lower at in the “internal” night and rises in the “internal” daytime
Persist even in the absence of sleep
EKG (electrocardiograph)
Measures heat activity
NREM
Stages 1-4
Stages 3 & 4 incorporate “deep sleep”
(Decreases when going through all the cycles)
REM
“Rapid eye movement”
Stage 5
Aka dream sleep
(Increases when going through all cycles)
Awake (pre-sleep) stage
Hypnagogic- state of consciousness just before falling asleep
Hypnopompic- state just Before we wake up
Relaxed state
NREM Sleep Stage 1
Alpha waves: short amplitude; high frequency
Loss of sensory experience
NREM Sleep Stage 2
Sleep spindles : bursts of rapid brain waves
NREM Sleep Stage 3
Deep sleep
NREM Sleep Stage 4
Deep sleep
Delta waves: high amplitude; low frequency
REM Sleep (Paradoxical sleep)
Increased internal activity (dreams, arousal)
Decreased external activity (Atonia)