Nocturnal penile tumescence
Concept
Normal, involuntary erections that occur during sleep, particularly during REM sleep stages, indicating healthy erectile function.
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Videos Mentioning Nocturnal penile tumescence

Improving Male Sexual Health, Function & Fertility | Dr. Michael Eisenberg
Andrew Huberman
Normal, involuntary erections that occur during sleep, particularly during REM sleep stages, indicating healthy erectile function.

Tools for Hormone Optimization in Males | Dr. Kyle Gillett
Andrew Huberman
A test to measure periodic erections during sleep, typically used to determine if erectile dysfunction has a physiological or psychological origin.