SLEEP Flashcards
Sleep is characterized by
Altered consciousness.
Minimal motor & sensory activity.
Specific pattern of brain activity.
Reduced interactions with the external world.
what is electroencephalography
is an electrophysiological monitoring method to record electrical activity of the brain, with electrodes placed along the scalp.
emg is used to
Monitor sleep stages & diagnose sleep disorders (Polysomnography).
Diagnose neurological disorders (e.g. epilepsy, encephalopathies, stroke…).
Monitor coma, brain death and anesthesia level
brain wave when highly alert and eyes open
low ampltude and high frequency
brain wave when ayes closed and relacx
low amplittude and high frequency
brain wave during drowsy
high amplitude and low frequency
brain wave during deep sleep
high amplitude and low frequency
what are the 2 states of wakefulness
active: eye open, activate state
resting wakefullness: eye closed, relaxed state
2 state of sleep
Non-rapid eye movement sleep (non-REM): composed of 4 stages:
Stage I
Stage II
Stage III
Stage IV
rapid eye-movement (REM) sleep
2 state of sleep
Non-rapid eye movement sleep (non-REM): composed of 4 stages:
Stage I
Stage II
Stage III
Stage IV
rapid eye-movement (REM) sleep
wave during wakefulness
Beta & Alpha waves: high EEG frequency (9–30 Hz) & low EEG amplitude (∼30 µV).
wave during stage 1 sleep weakfulness
Theta waves: intermediate EEG frequency (5–8 Hz) & intermediate EEG amplitude (50 – 100 µV) and K-Complex (isolated slow wave).
wave during stage 2 wakefulness
Theta waves and sleep spindle: high EEG frequency (11–15 Hz) & low EEG amplitude (50 µV).
wave of stage 3 and 4 of wakefulness
slow waves (delta waves): low frequency (0.5 to 4 Hz) & high EEG amplitude (100 – 150 µV).
REM sleep: Beta & Alpha waves
high EEG frequency (9–30 Hz) & low EEG amplitude (∼30 µV). The same as in Wakefulness.