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Nocturnal penile tumescence

Mechanism of Nocturnal Penile Tumescence: – Erection initiated by parasympathetic nervous system – Acetylcholine release leads to nitric oxide release causing tumescence – Noradrenergic neurons […]

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Mechanism of Nocturnal Penile Tumescence:
– Erection initiated by parasympathetic nervous system
– Acetylcholine release leads to nitric oxide release causing tumescence
– Noradrenergic neurons in the brain inhibit penile erection
– Full bladder can stimulate an erection

Diagnostic Value of Nocturnal Penile Tumescence:
– Nocturnal tumescence helps diagnose erectile dysfunction
– Elastic device detects changes in girth during sleep
– Presence of nocturnal tumescence indicates a physiological cause
– Absence of nocturnal tumescence indicates a psychosomatic cause
– Used by sexual health practitioners for assessment

Nocturnal Penile Tumescence Testing:
– Test conducted over 3 days
– Detects erections during sleep
– Determines psychological or physiological cause of erectile dysfunction
– 3-5 episodes of NPT per night
– Duration of episodes reduced with age

Related Concepts:
– Nocturnal emission
– Priapism
– Sleep sex
– Swelling
– Tumescence

Research and Publications:
– Studies by Schiavi RC and Schreiner-Engel, Johnson et al., Abdessater et al., Podolej GS and Babcock C, Bella AJ and Lue TF
– Research publications in the Journal of Gerontology, International Journal of Impotence Research, Basic and Clinical Andrology, Emergency Medicine Practice, and Smiths General Urology
– Further reading by Knight on ‘The Complete Guide to Fertility Awareness’
– Citations and additional resources cited in various formats

Nocturnal penile tumescence (Wikipedia)

Nocturnal penile tumescence (NPT) is a spontaneous erection of the penis during sleep or when waking up. Along with nocturnal clitoral tumescence, it is also known as sleep-related erection. (Colloquially, the term morning wood (or less commonly, morning glory) is also used, although this is more commonly used to refer specifically to an erection beginning during sleep and persisting into the period just after waking.) Men without physiological erectile dysfunction or severe depression experience nocturnal penile tumescence, usually three to five times during a period of sleep, typically during rapid eye movement sleep. Nocturnal penile tumescence is believed to contribute to penile health.

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