ClinicalMedicine

EEG — Vertex Sharp Waves (V-Waves) of Stage N1 NREM Sleep Onset

1 MCQs in Medicine for NEET PG

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Sample Questions

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A 28-year-old man undergoes overnight polysomnography for suspected sleep-disordered breathing. During the sleep study, the EEG technician notes the appearance of sharply contoured, biphasic transients maximal at the Cz electrode (vertex) with amplitudes of 150–180 microvolts, occurring bilaterally and symmetrically as the patient transitions from drowsy wakefulness into sleep. The structure marked **A** in the diagram shows this pattern. Which of the following best characterizes the clinical significance of this finding?

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