Nocturnal penile tumescence (NPT) has been reported for males of only a few mammalian species, including humans, albeit this scarcity might be an artefact of the difficulty of documenting it. We investigated NPT in 12 adult male chimpanzees living in an all-male group at Kumamoto Sanctuary, Japan. Recorded non-invasively with infrared video cameras across 72 nights (6 per individual), we observed NPT in two thirds of the individuals (8/12), with
Purchase
Buy instant access (PDF download and unlimited online access):
Institutional Login
Log in with Open Athens, Shibboleth, or your institutional credentials
Personal login
Log in with your brill.com account
Affanni, J.M., Cervino, C.O. & Marcos, H.J.A. (2001). Absence of penile erections during paradoxical sleep. Peculiar penile events during wakefulness and slow wave sleep in the armadillo. — J. Sleep Res. 10: 219-228.
Aronson, L.R. (1949). Behavior resembling spontaneous emissions in the domestic cat. — J. Comp. Physiol. Psychol. 42: 226-227.
Beach, F.A. (1975). Variables affecting “spontaneous” seminal emission in rats. — Physiol. Behav. 15: 91-95.
Bielert, C., Howard-Tripp, M.E. & Van der Walt, L.A. (1980). Environmental and social factors influencing seminal emission in chacma baboons (Papio ursinus). — Psychoneuroendocrinology 5: 287-303.
Brindle, M. (2018). Postcopulatory selection. — In: Encyclopedia of animal cognition and behavior (Vonk, J. & Shackelford, T., eds). Springer International, Cham, p. 1-4.
Carani, C., Granata, A.R.M., Bancroft, J. & Marrama, P. (1995). The effects of testosterone replacement on nocturnal penile tumescence and rigidity and erectile response to visual erotic stimuli in hypogonadal men. — Psychoneuroendocrinology 20: 743-753.
Fisher, C., Gross, J. & Zuch, J. (1965). Cycle of penile erection synchronous with dreaming (REM) sleep: preliminary report. — Arch. Gen. Psychiatr. 12: 29-45.
Gibbs, R.A. & Pachter, L. (2004). Genome sequence of the Brown Norway rat yields insights into mammalian evolution. — Nature 428: 493-521.
Giuliano, F. (2011). Neurophysiology of erection and ejaculation. — J. Sex. Med. 8: 310-315.
Havercamp, K., Morimura, N. & Hirata, S. (2021). Sleep patterns of aging chimpanzees (Pan troglodytes). — Int. J. Primatol. 42: 89-104.
Hirshkowitz, M. & Schmidt, M.H. (2005). Sleep-related erections: clinical perspectives and neural mechanisms. — Sleep Med. 9: 311-329.
Karacan, I., Rosenbloom, A.L. & Williams, R.L. (1970). The clitoral erection cycle during sleep. — Sleep Res. 7: 338.
Levin, R.J. (1975). Masturbation and nocturnal emissions — possible mechanisms for minimising teratozoospermie and hyperspermie in man. — Med. Hypotheses 1: 130-131.
Martan, J. (1968). Factors affecting spontaneous ejaculation of male Guinea-pigs. — Reproduction 17: 161-163.
Marx, V. (2001). The semen book. — Free Association Books, London.
McDonnell, S.M. (1990). Spontaneous erection and masturbation in equids. — In: Proceedings of the thirty-fifth annual convention of the American association of equine practitioners, p. 567-580.
Montorsi, F. & Oettel, M. (2005). Testosterone and sleep-related erections: an overview. — J. Sex. Med. 2: 771-784.
Morimura, N., Idani, G.I. & Matsuzawa, T. (2011). The first chimpanzee sanctuary in Japan: an attempt to care for the “surplus” of biomedical research. — Am. J. Primatol. 73: 226-232.
Morisaka, T., Sakai, M., Kogi, K., Nakasuji, A., Sakakibara, K., Kasanuki, Y. & Yoshioka, M. (2013). Spontaneous ejaculation in a wild Indo-Pacific bottlenose dolphin (Tursiops aduncus). — PLoS ONE 8: e72879.
Morlet, A., Watters, G.R., Dunn, J., Keogh, E.J., Creed, K.E., Tulloch, A.G.S., Lord, D.J. & Earle, C.M. (1990). Effects of acute alcohol on penile tumescence in normal young men and dogs. — Urology 35: 399-404.
Moser, D., Anderer, P., Gruber, G., Parapatics, S., Loretz, E., Boeck, M., Kloesch, G., Heller, E., Schmidt, A., Danker-Hopfe, H., Saletu, B., Zeitlhofer, J. & Dorffner, G. (2009). Sleep classification according to AASM and Rechtschaffen & Kales: effects on sleep scoring parameters. — Sleep 32: 139-149.
Riesen, A. (1971). Nissen’s observations on the development of sexual behavior in captive-born, nursery-reared chimpanzees. — In: The chimpanzee, vol. IV (Bourne, G.H., ed.). Karger, Basel, p. 1-18.
Schmidt, M.H., Valatx, J.L., Schmidt, H.S., Wauquier, A. & Jouvet, M. (1994). Experimental evidence of penile erections during paradoxical sleep in the rat. — Neuroreport 5: 561-564.
Schmidt, M.H. & Schmidt, H.S. (2004). Sleep-related erections: neural mechanisms and clinical significance. — Curr. Neurol. Neurosci. Rep. 4: 170-178.
Siegel, J.M. (2008). Do all animals sleep? — Trends Neurosci. 31: 208-213.
Sommer, V. & Vasey, P. (eds) (2011). Homosexual behaviour in animals: evolutionary perspectives. — Cambridge University Press, Cambridge.
Sommer, V., Thomsen, R. & Brindle, M. (2022). Masturbation in primates. — In: The Cambridge handbook of evolutionary perspectives on sexual psychology (Shackelford, T.K., ed.). Cambridge University Press, Cambridge, chapter 5.
Stefanick, M.L. (1983). The circadian patterns of spontaneous seminal emission, sexual activity and penile reflexes in the rat. — Physiol. Behav. 31: 737-743.
Thomsen, R. & Soltis, J. (2004). Male masturbation in free-ranging Japanese macaques. — Int. J. Primatol. 25: 1033-1041.
All Time | Past Year | Past 30 Days | |
---|---|---|---|
Abstract Views | 2299 | 400 | 30 |
Full Text Views | 129 | 17 | 3 |
PDF Views & Downloads | 207 | 32 | 6 |
Nocturnal penile tumescence (NPT) has been reported for males of only a few mammalian species, including humans, albeit this scarcity might be an artefact of the difficulty of documenting it. We investigated NPT in 12 adult male chimpanzees living in an all-male group at Kumamoto Sanctuary, Japan. Recorded non-invasively with infrared video cameras across 72 nights (6 per individual), we observed NPT in two thirds of the individuals (8/12), with
All Time | Past Year | Past 30 Days | |
---|---|---|---|
Abstract Views | 2299 | 400 | 30 |
Full Text Views | 129 | 17 | 3 |
PDF Views & Downloads | 207 | 32 | 6 |