ABRET Normal Variants, Normal/AbnormaI Adult EEG Questions With All Correct Answers

What environmental factors enhance lambda? a. low illumination visual scene b. noxious stimuli c. loud sounds d. scanning high complexity visual scene - scanning high complexity visual scene What is the electrical abnormality associated with breach rhythm? a. a focal high voltage electrical generator in the cortex b. a focal low impedance swelling of the scalp c. a focal high impedance pathway through the skull d. a focal low impedance pathway through the skull - a focal low impedance pathway through the skull Bancauds phenomenon, alpha squeak, and paradoxal alpha all have to do with: a. a reaction of the background b. an abnormality of the background c. nonresponsiveness of the alpha rhythm d. drowsy effect on the alpha rhythm - a reaction ofthe background What normal activity would be seen most prominently at the C3 or C4 electrode position? a. alpha b. mu c. POSTS d. FIRDA - mu Rare 6-11 Hz negative sharp arciform waves, most commonly seen in adults over 30 years in the mid-temporal regions a. RMTD b. mu c. wickets d. midline theta rhythm - wickets Which pattern is most likely to be seen during prolonged recordings of a normal awake 30 year old? a. OIRDA b. lambda c. SREDA d. FIRDA - lambda Lambda waves are a. evoked by eye movement b. best seen just before falling asleep c. usually negative in bipolar derivations d. precursors of POSTS - evoked by eye movement Posterior dominant rhythm (PDR) or alpha rhythm should not be calculated immediately upon eye closure because of what normal variant? a. Posterior slow waves of youth b. slow alpha variant c. alpha squeak d. clenoids - alpha squeak What do mittens, midline rhythmic theta, and trace aternans have in common? a. they all appear exclusively from wakefulness b. they are all markers of neonatal immaturity c. they are all consistent with encephalopathy d. they are all normal waveforms - they are all normal waveforms Which normal waveform is not typically seen in the posterior leads? a. lambda b. POSTS c. photic driving d. wickets - wickets (they are rare variant found in midtemporal regions) Mu rhythm a. C3/C4