Role of striated penile muscles in penile reflexes, copulation, and induction of pregnancy in the rat

Sachs, Benjamin D.

doi:10.1530/jrf.0.0660433

Cited by 308 publications

(181 citation statements)

References 27 publications

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“…Likewise, a significant reduction in the number of penile flips was observed in ex copula supine tests [79]; such penile flips appear to facilitate vaginal mtromission [ 112,191 ] The inhibitory effects of elevated PRL levels on erectile potency appear to be medmted by central nervous tissue [79]. The suppression of penile reflexes in hyperPRL was reversed after transection of the spinal cord.…”

Section: Prolat Tin and Male Sexual Behaviormentioning

confidence: 96%

“…A tight fitting plug ensures adequate sperm transport and mhtbits plug displacement by another male [145]. Dorsiflexions of the glans penis ("flips") are associated with gaining a proper onentation for penile insertion during copulatory mounts [191,192]. Seminal emissions are also observed during the supine test if the preputial sheath is left unretracted (E. R. Smith, personal communication).…”

Section: Conceptual Analysts Of Components Of Male Sexual Behaviormentioning

confidence: 99%

“…The sexually dlmorphic lumbosacral motor nuclei whose projections innervate the perineal muscles [52,199] that control erectile reflexes [191] are themselves innervated by serotonerglc fibers presumably originating in brainstem nuclei [161]. Thus, intrathecal administration (i.e., in the subarachnoid space around the lumbosacral spinal cord) of 5-HT resulted in a dramatic reduction in the proportion of animals achieving pemle intromisslons; however, mounting behavior was unaffected [212].…”

Section: Lo(ahzatum Of 5-ht Lffect~ Ascending Raphe Axonsmentioning

confidence: 99%

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Pharmacological analysis of male rat sexual behavior

Bitran

Hull

1987

Neuroscience & Biobehavioral Reviews

409

155

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Section: Prolat Tin and Male Sexual Behaviormentioning

confidence: 96%

Section: Conceptual Analysts Of Components Of Male Sexual Behaviormentioning

confidence: 99%

Section: Lo(ahzatum Of 5-ht Lffect~ Ascending Raphe Axonsmentioning

confidence: 99%

See 1 more Smart Citation

Pharmacological analysis of male rat sexual behavior

Bitran

Hull

1987

Neuroscience & Biobehavioral Reviews

409

155

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“…The rat spinal nucleus of the bulbocavernosus (SNB) is exceptional, however, in that cell death in the SNB occurs primarily during the first postnatal week (Nordeen et al, 1985). SNB motoneurons reside in the ventromedial lumbar spinal cord and the majority of motoneurons in this nucleus innervate the bulbocavernosus (BC) and levator ani (LA), two sexually dimorphic, striated muscles active during copulation (Sachs, 1982;Wallach and Hart, 1983). Adult males have many more SNB motoneurons than do females (Breedlove and Arnold, 1980).…”

Section: Ciliary Neurotrophicmentioning

confidence: 99%

Ciliary neurotrophic factor maintains motoneurons and their target muscles in developing rats

et al. 1993

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Ciliary neutrophic factor (CNTF) can enhance motoneuron survival during naturally occurring cell death in the chick (Oppenheim et al, 1991). Because receptors for CNTF are expressed in both motoneurons and their target muscles (Davis et al., 1991; lp et al., 1993), both tissues are potential sites of CNTF action in development. We examined the ability of CNTF to prevent the degeneration of a neuromuscular system in developing female rats. The death of motoneurons in the spinal nucleus of the bulbocavernosus (SNB) extends postnatally and is sexually dimorphic, with many more motoneurons dying in females than in males. The bulbocavernosus (BC), a target muscle of SNB motoneurons, also degenerates postnatally in females. Female rats treated with daily injections of 1 microgram CNTF from embryonic day 22 through postnatal day 3 (P3) had 70% more SNB motoneurons on P4 than did control animals, and the number of pyknotic profiles in the SNB area was markedly reduced by CNTF. In addition, the degeneration of the BC was completely prevented by CNTF treatment of perinatal female rats. These results demonstrate that CNTF can preserve mammalian motoneurons from developmental death, but also suggest that the sparing effect of CNTF on motoneurons in vivo may be a secondary consequence of effects on target muscles.

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“…Os mús-culos bulboespojosos, isquiocavernosos e retratores do pênis, estão localizados aderidos ao pênis e dispostos em pares, sendo que o M. bulboesponjoso se origina na porção cranial do bulbo e se insere na porção caudal da raiz do pênis (Fig.3A,B), semelhante à viscacha estudada por Pieri et al (2012). De acordo com Sachs (1982, 1983) e Tang et al (1998, a função desse músculo está ligada ao ato de ereção, respostas a estímulos na região genital e também auxilia, através de contrações, na expulsão de resquícios de urina e sêmen da uretra, assim como estudado por Bancila et al (1999) em ratos.…”

Section: Resultsunclassified

Dimorfismo sexual e estrutura perineal em Coendou prehensilis (Ouriço-cacheiro)

Cury

Ambrósio²

2016

Pesq. Vet. Bras.

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RESUMO.-Coendou prehensilis é um mamífero da ordem Rodentia, que é composta por cinco subordens: Sciuromorfos, a qual pertencem os esquilos; Castorimorfos, onde encontramos os castores; Myomorfos, a qual encontramos os ratos; Anomaluromorfos, Lebre-saltadora, e os Histricomorfos, onde observamos a capivara. Coendou prehensilis is a mammal that belongs to the Rodentia order, which consists of five suborders: Sciuromorfos, to which the squirrels belongs; Castorimorfos where we have the beavers; Myomorfos, which include the mice; Anomaluromorfos, Hare jumper, and Hystricomorfos, where we have the capybara. We used the porcupine clerk in the research (Coendou prehensilis), one male and one female, both adults. These animals were transferred to the Laboratory of Anatomy, Department of Veterinary Medicine, Faculty of Animal Science and Food Engineering, University of São Paulo (FZEA/USP), originating from roadaccidents in Pirassununga, SP (Registration n. 43274-1 SISBIO). The animals were fixed with 10% formaldehyde and dissected in the perineum region. The results showed that the only feature which allows us to differentiate males from females is the space between anus and the genitals of the animals; the male has a larger space than the female. The perineum is an extra cavity region with lozenge definition, and this definition is formed by interpubic bones, the pubic and processes of the pubic and ischium. The male Coendou prehensilis perineum consists of five major muscles, three arranged on the urogenital diaphragm surface (ischiocavernosus muscles, M. bulbocavernosus and Mm. bulboesponjosos) and two in the pelvic diaphragm (M. levator ani and M. penis retractor). The female's perineum is composed by ischiocavernosus, bulbospongiosus, levator ani and external anal sphincter muscles. We conclude that both sexes have the ischiocavernosus muscles, Mm. bulboesponjosos, M. levator ani and external anal sphincter, and it is very important to study the perineal region of the animals, because understanding the function and location of each muscle we can contribute to future research on reproduction and animal behavior during copulation, helping to a better knowledge about reproductive potential of Erethizontidae rodents, and to contribute in the applied biotechnology development of reproduction, what can be helpful even in captivity reproduction of these animals besides the ones in free environment.

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Role of striated penile muscles in penile reflexes, copulation, and induction of pregnancy in the rat

Cited by 308 publications

References 27 publications

Pharmacological analysis of male rat sexual behavior

Pharmacological analysis of male rat sexual behavior

Ciliary neurotrophic factor maintains motoneurons and their target muscles in developing rats

Dimorfismo sexual e estrutura perineal em Coendou prehensilis (Ouriço-cacheiro)

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