II M Normal Abnormal EEG Flashcards
EEG shows 4 stages of sleep
a full-term child at 6 months
Synchronous sleep spindles
by age 2 years
Asynchrony of sleep is abnormal
after 2 years
OIRDA
encephalopathic EEG pattern in pediatrics
Normal hyperventilation response
high voltage delta
maximal in posterior
Pediatric EEG
HIGHER AMPLITUDE than adult
Pediatric Vertex waves
sharper than adult
PDR reactive to Eo/Ec
3-6 months
Posterior slow waqves of Youth (PSWY)
high voltage delta/theta
children 8-14
HV response
interictal EEG with a febrile seizure
NoRmAl
PDR at age 1
5 Hz
PDR at 5-6 months (awake)
5-6 Hz
a difference in background frequency is
abnormal
6% of adults have
Asymmetrical alpha
No alpha background?
Abnormal
REM sleep <20% of total sleep time
adults over 70 years
ADA
arrhythmic delta activity
Record adults in maximal state awareness
to distinguish from slowing/drowsiness
Alpha diminishes with
eyes open
EEG with tense patient
widespread low voltage (Beta)
an abnormal EEG in a 55 y/o:
delta activity
a normal awake adult will not have
delta
a normal awake adult
low voltage fast activity
eye movement artifact
Bancaud phenomenon
the background doesn’t attenuate with eye-opening
Wickets
not seen in:
temporals
posterior
rolandic spikes
seen most often in children
electrodecremental events
infantile spasms