Aspect PMA 24-34 Weeks
(Preterm)
PMA 35-45 Weeks
(Term)
Infant > 3 months
Total Sleep
Duration
16-18 hours per day, with frequent
awakenings
16-18 hours per day, with more
continuous sleep cycles
7-9 hours per night, with consolidated
sleep periods
Sleep
Cycles
It is hard to distinguish esp. before 30
weeks
Awake->AS (50%) -> QS (50%) Awake->N1(5%) ->N2(50%)->N3(20%)-
>REM (25% or about 90 min)
Awake Eye open EEG =Activite Moyenne (medium
activity) : continuous 25-50 uV mixed
theta, delta override beta
PDR start to reactive at 3 mo
and turn from delta/theta to alpha (8Hz)
at 3 yo
REM Sleep
(Active
Sleep: AS)
Body moves but no rapid eye movement Gradually less body movement, more
rapid eye movement, same EEG feature
Rapid eye movement -no body moves
NREM
Sleep
(Quiet
Sleep: QS)
respiration irregular *QR*
After 30 weeks: Trace discontinued
(look-alike burst suppression, <25 uV )
Delta brush (28-
42 wks)
Temporal Temporal theta
Monophasic occipital delta (DDx with rsp
artifact may fast up to 200/s)
Trace alternate (Alternate tracing 50-
150 uv with 25-50 uv interburst )which
gradually replaced with continuous slow
wave
Delta brush faded replace with sleep
spindles
Continuous slow wave sleep in N3
Sleep spindle - asynchronus until 2 yo
Hypnagogic hypersynchrony – falling
sleep, Hypnopompic hypersynchrony –
awaking( 1-10 yo)
