1 MCQs in Medicine for NEET PG
A 30-year-old man with excessive daytime sleepiness (Epworth score 16) and witnessed apneas undergoes overnight polysomnography. As he transitions into N1 sleep, the technologist observes brief sharp transients over the occipital electrodes (O1, O2) marked as **B** in the diagram. These are predominantly positive in polarity, 30–50 microvolts in amplitude, occurring in runs of 3–5 or singly with a diphasic morphology. Which of the following statements best characterizes the clinical significance of the structure marked **B**?
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