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BOARD PREP- WK 5- REVIEW
QUESTIONS EXAM WITH CORRECT
ANSWERS 2025
The general characteristics of EEG patterns are defined by what correct answers >> age level of consciousness state of brain function In the normal adult population, the mean freq of the alpha rhythm is correct answers >> 10.2 Hz Post-menstrual age is the correct answers >> gestational age plus chronological age It is important to record at least a portion (10-30 sec) of __________ with young, awake children who are unable to maintain eye closure upon command. Noting that spontaneous eye closure at this age is a sign of _____ correct answers >> a passive eye closure state/ drowsiness
What percentage of the population have very low voltage background activity without measurable alpha rhythm correct answers >> 10% Consists of rhythmic 5- to 7- Hz theta bursts, usually maximum at midtermporal electrodes, which sometimes spread widely to the parasagittal region correct answers >> RMTD Normal neonatal EEG pattern correct answers >> active sleep delta brush trace discontinue Amplitude asymmetry of the occipital alpha rhythm is seen in what percentage of adults correct answers >> 60% What stage of sleep do vertex sharp waves first appear correct answers >> stage I Rhythm of increased fast activity, often with spiky appearance, seen over craniotomy sites correct answers >> breach rhythm What is more reliable in determining abnormality of alpha correct answers >> alpha asymmetric freq
What physiological parameters assist in determining drowsiness correct answers >> decrease in blinking slow-drifting horizontal eye movements decreased muscle tone or movement artifact What is the freq of beta rhythm/activity correct answers >> higher than 14 Hz but less than 30 Hz In children before the age of 10 years, drowsiness can be characterized by paroxysmal bursts of 3-5 Hz theta-delta activity in the frontocentral regions called correct answers >> hypnagogic hypersynchrony Occasionally, the first few seconds after closing the eyes might produce an alpha rhythm that is slightly faster than in other resting and eyes-closed-states. What is this called correct answers >> squeak effect What waveform denotes the onset of stage II sleep correct answers
sleep spindles What is the freq of alpha rhythm correct answers >> 8-13 Hz Characterized by a small, usually than 50 uv, mono- or diphasic spike of short duration correct answers >> small sharp spikes SSS
Also termed "phantom spike and wave" consisting of rhythmic spike- wave bursts with a freq of 5 to 7 Hz correct answers >> 6 Hz Hz spike What is a characteristic of wicket spikes correct answers >> usually appear as brief (<1 sec) burst at 6 to 11 Hz What is a characteristic of midline theta rhythm correct answers >> focal theta rhythm at 5 to 7 Hz, maximum in the midline region at Cz or Fz appears during wakefulness and drowsiness What is the frequency of theta activity correct answers >> less than 8 Hz and faster than 4 Hz SREDA is mainly seen in what age group correct answers >> over 50 years What is the frequency of delta activity correct answers >> less than 3 Hz Arched-shaped rhythm in central areas during wakefulness, suppressed with contralateral hand movements correct answers >> Mu
