►
Pelvic viscera
and retroperitoneal space
Innervation of the male genitalia
► ►
Kidney
Suprarenal gland
Urinary bladder
Medulla spinalis
Fig. 1160
Male genitalia,
Organa genitalia masculina;
diagram demonstrating the autonomous innervation
of the left side;
ventral and lateral view, respectively.
Green = sympathetic nervous system
Purple = parasympathetic nervous system
* Also: erigent nerves
Surgical removal of paraaortic lymph nodes or operations at
the abdominal aorta and the large arteries of the pelvis can
cause damage to the sympathetic nerves with the consequence
of ejaculatory impotency (Impotentia generandi]. Prostate
operations, in turn, may damage the parasympathetic fibres
innervating the penis, thus leading to erectile impotency
llmpotentia coeundi).
Glandula vesiculosa
Vesica urinaria
N hypo-
gastricus
sinister
Plexus
hypogastricus
inferior
Prostata
Glandula bulbourethralis
Corpus spongiosum penis
Corpus cavernosum penis
Urethra masculina
Ganglia pelvica, Radix
parasympathica
[Nn splanchnici pelvici]*
Plexus testicuiaris
Plexus deferentialis
Gians penis
Innervation of the male genitalia
Origin
Course
Organ
Function
Parasympathetic
Sacral part of
the spinal
cord 1S2 - S4I
Ganglia pelvica, Radix
parasympathica
[Nn. splanchnici pelvici]
Penis
Corpus cavernosum
Vasodilatation
Erection
Sympathetic
Thoracic part
of the
spinal cord
(T10-T12)
Plexus mesenterici
superior et inferior
T
Truncus sympathicus
T
Plexus testicuiaris
Testis
Regulation of blood flow
Lumbar part
of the spinal
cord (U - L2I
Plexus hypogastricus superior
N hypogastricus
4,
Plexus hypogastricus
inferior
Glandula bulbo-
urethralis
Expulsion of its fluid
Ductus (vas) deferens
Contraction, transport of the
sperms into the urethra
Glandula vesiculosa
Prostata
Expulsion of its content into
the urethra
Somatomotor,
somatosensory
Sacral part of
the spinal cord
(S2 - S4-)
N pudendus
(M sphinctervesicae]
Closure of the urinary
bladder to prevent retrograde
ejacul :rion
M ischiocavernosus
M bulbospongiosus
Expulsion of the ejaculate
out of the urethra
Nn. scrotales posteriores
N. dorsalis penis
Scrotal skin
Penile skin
