Patterns: Normal Sleep Flashcards
Stage N1 =
drowsiness
what will you see during stage N1 sleep?
- alpha attenuation
- slow rolling eye movements
- POSTS
- vertex sharp waves
4-5 Hz
<50 uV
bilaterally synchronous
rarely seen before age 5
POSTS
10-150uV
spontaneous
best seen in transverse montage
maximal at Cz
vertex sharp waves
what is seen in stage II sleep?
- sleep spindles
- k-complexes
12-15 Hz centrally
10-12 Hz frontally
<50 uV
plays a roll in memory consolidation
sleep spindles
frontal dominant
sleep spindles can ride on these
senses are beginning to block outside stimuli
K-complexes
what is seen in stage III sleep?
delta sleep
slow wave sleep with 75uV in amplitude
restorative sleep for the body
difficult to wake out of and causes grogginess
delta sleep
what is usually seen with REM sleep?
saw tooth waves
bursts of slower activity over the midline, with a spread that decreases in both directions
2-6 Hz
saw-tooth waves
how many minutes does REM occur after sleep onset?
90 minutes
early REM onset suggests narcolepsy, sleep deprivation, or inconsistent sleep schedule
narcolepsy
active mind, paralyzed body
paradoxical sleep
- bursts of rhythmic activity in theta range
- mid-temporal maximal location
- seen in drowsiness
- adolescents and young adults
RMTD
- 6Hz
- posterior temporal region
- seen in drowsiness or light sleep
- adolescents, adults, mostly young women
phantom spike waves
- sharp wave followed by a slow wave of the same polarity
- central midline
- seen in deep sleep
- seen after 15 years of age, mostly adults
Mittens
- small sharp spikes
- temporal region with broad field
- seen in stage I or II sleep
-adults 30-60
BETS
- positive activity
- occiptals
- seen in stage II
- rarely seen before age 5, most commonly in adolescence through middle adulthood (15-35)
POSTS
- sharply contoured waves, comb-like or arciform in 14 and 6 Hz trains
- posterior and temporal regions
- drowsiness and light sleep
- ages 14-16, not after 25
14 and 6 Hz Positive spike bursts
-3-5Hz
- mid frontal dominant but seen in all channels
-seen in different stages
- develops 3-6 months
hypersynchrony
- slow waves mixed with the normal waking background
- occipital region
- awake with eyes closed
-seen between ages 6 and 12
PSWY
