EEG (Electroencephalography)
A. Indications
Confirming, localizing, or classifying seizures—but a normal EEG does not rule out the possibility of seizures. EEGs aid dx of CJD and encephalopathy.
B. Montages
1. Bipolar: Good for localization; bad because distort widely distributed potentials, e.g., vertex waves. Location of spike = at phase reversal.
2. Referential: Good for sleep studies. More EKG artifact. Location of spike = at max. amplitude.
C. Studies
1. Routine
2. Sleep-deprived: More sensitive for epileptiform activity, which is seen especially in sleep-wake transitions.
3. ContinuousRelated posts:
Stay updated, free articles. Join our Telegram channel
Full access? Get Clinical Tree
