Penile tumescence in NREM sleep occurs with what frequency?

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Multiple Choice

Penile tumescence in NREM sleep occurs with what frequency?

Nocturnal penile tumescence occurs as part of normal sleep, but its pattern varies by sleep stage. Erections are most common during REM sleep, when parasympathetic activity is prominent. In non-REM sleep, autonomic activity is more stable and less conducive to erections, so penile tumescence happens only infrequently. Therefore, the frequency of penile tumescence in NREM sleep is infrequent.

Nocturnal penile tumescence occurs as part of normal sleep, but its pattern varies by sleep stage. Erections are most common during REM sleep, when parasympathetic activity is prominent. In non-REM sleep, autonomic activity is more stable and less conducive to erections, so penile tumescence happens only infrequently. Therefore, the frequency of penile tumescence in NREM sleep is infrequent.

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