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The dorsal nerve of the penis is the deepest of three divisions of the pudendal nerve; it accompanies the internal pudendal artery along the ramus of the ischium; it then runs forward along the margin of the inferior ramus of the pubis, between the superior and inferior layers of the fascia of the urogenital diaphragm.
In human anatomy, the penis (/ ˈ p iː n ɪ s /; pl.: penises or penes; from the Latin pēnis, initially "tail" [1]) is an external sex organ (intromittent organ) through which males urinate and ejaculate.
As part of the glans penis, the frenulum is innervated by divisions of the pudendal nerve; the dorsal nerve of the penis and a branch of the perineal nerve. [ 10 ] [ 11 ] Blood supply to the frenulum is provided by branches of the dorsal artery of the penis that curve around each side of the neck to enter the frenulum and the glans from its ...
The cavernous nerves are post-ganglionic parasympathetic nerves that facilitate penile erection and clitoral erection. [1] They arise from cell bodies in the inferior hypogastric plexus where they receive the pre-ganglionic pelvic splanchnic nerves (S2-S4). In the penis, there are both lesser cavernous nerves and a greater cavernous nerve.
The superficial branches of the perineal nerve become the posterior scrotal nerves in men, [3] and the posterior labial nerves in women. [1] The deep branch of the perineal nerve (also known as the "muscular" branch) travels to the muscles of the perineum. [1] Both of these are superficial to the dorsal nerve of the penis or the dorsal nerve of ...
They have a slightly different origin, insertion and function in males and females. In males, these muscles cover the bulb of the penis, while in females, they cover the vestibular bulbs. In both sexes, they are innervated by the deep or muscular branch of the perineal nerve, which is a branch of the pudendal nerve.
Three spinal nerves in the sacrum (S2–4), commonly referred to as the pelvic splanchnic nerves, also act as parasympathetic nerves. Owing to its location, the parasympathetic system is commonly referred to as having "craniosacral outflow", which stands in contrast to the sympathetic nervous system, which is said to have "thoracolumbar outflow".
The vas deferens has a dense sympathetic innervation, [16] making it a useful system for studying sympathetic nerve function and for studying drugs that modify neurotransmission. [7] It has been used: as a bioassay for the discovery of enkephalins, the endogenous opiates. [17] to demonstrate quantal transmission from sympathetic nerve terminals ...