Sleep Stages and their Characteristic Waves*
N1 produces this type of wave
theta wave
type of low frequency, low amplitude brain wave characteristic of the end of stage 1 sleep
theta wave
first stage of sleep; transitional phase that occurs between wakefulness and sleep; the period during which a person drifts off to sleep
stage 1 sleep
N2
stage 2 sleep
exhibits K-complex and spindles
stage 2 sleep
second stage of sleep; the body goes into deep relaxation; characterized by the appearance of sleep K-complex
stage 2 sleep
second stage of sleep; the body goes into deep relaxation; characterized by the appearance of sleep spindles
stage 2 sleep
third stage of sleep; deep sleep characterized by low frequency, high amplitude delta waves
stage 3 sleep
N1, N2, N3, N4, REM, N1 and the cycle repeats
False
fourth stage of sleep; deep sleep characterized by low frequency, high amplitude delta waves
stage 4 sleep
A __________ is an electroencephalography (EEG) waveform that occurs during stage 2 of NREM sleep. It is the "largest event in healthy human EEG". They are more frequent in the first sleep cycles.
K-complex
N2 produces this type of waveform
K-complex
N2 produces this type of wavefrom spindles along with ______
K-complex
complex that aids in sleep-based memory consolidation
K-complex
suppress cortical arousal in response to stimuli that the sleeping brain evaluates not to signal danger
K-complex
very high amplitude pattern of brain activity associated with stage 2 sleep that may occur in response to environmental stimuli
K-complex
NREM means
Non-REM sleep
rapid bursts of high frequency brain waves during stage 2 sleep that may be important for learning and memory
Spindles
N1, N2, N3, N4, REM, N2 and the cycle repeats
True
True or false? N1, N2, N3, N4
True
characteristic of still being awake. relaxed wakefullness produces this type of wave
alpha wave
relatively low frequency & relatively high amplitude brain wave
alpha wave
N3 produces this type of wave
delta wave
N4 produces this type of wave
delta wave
When you first fall asleep your brain activity resembles a dead person (exaggeration - low frequency - low amplitude) as you progress in the sleep cycle you exhibit ( low frequency high amplitude) waves.
delta wave
type of low frequency, high amplitude brain wave characteristic of stage 3 and stage 4.
delta wave
period of sleep outside periods of rapid eye movement (REM) sleep
non-REM (NREM)
period of sleep characterized by brain waves very SIMILIAR to those during wakefulness
rapid eye movement (REM) sleep
period of sleep characterized by darting movements of the eyes under closed eyelids
rapid eye movement (REM) sleep
