1 MCQs in Medicine for NEET PG
A 45-year-old man undergoes polysomnography for evaluation of excessive daytime sleepiness. The sleep study shows prominent delta waves (0.5–2 Hz, amplitude >75 μV) occupying >20% of the epoch during the first third of the night. The structure marked **D** in the diagram represents this stage. Which of the following is the PRIMARY physiological function of the stage marked **D**?
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