pelvic & perineal myology Flashcards
what is the perineal body
fibromuscular mass between anal canal and perineal membrane which serves as an attachment point for pelvic ms.
what muscles attach to the perineal body
bulbospongiosus
superficial & deep transverse perineal ms.
external anal sphincter
what are the three superficial perineal ms and what are they innervated by
superficial transverse perineal m
bulbospongiosus m
ischiocavernosus m
deep perineal n.
what makes up the erectile tissue of the penis
paired dorsal cylinders
unpaired ventral cylinders
what are the parts of the paired dorsal cylinders of erectile tissue?
corpus cavernosum
crura of the penis
what are the parts of the unpaired ventral cylinder of erectile tissue?
bulb of the penis
corpus spongiosum
glans penis
what are the parts of the clitoris?
crura of the clitoris
glans clitoris
body of the clitoris
what is the paired component of female erectile tissue?
bulbs of the vestibule
what muscle covers the bulbs of the vestibule
bulbospongiosus m.
what muscle covers the crura of the clitoris or the crura of the penis?
ischiocavernosus m
What is significant about the deep transverse perineal m? What is it innervated by?
it is smooth muscle in females and skeletal muscle in males
deep perineal n.
what innervates the external urethral sphincter?
dorsal n. of the penis/clitoris
what is the action of compressor urethrae m.
holds external urethral sphincter around urethra
what is the relationship of the external anal sphincter to the perineal body?
the external anal sphincter holds the perineal body in place from the posterior aspect
what innervates the external anal sphincter?
inferior rectal n
what innervates the internal anal sphincter
pelvic splanchnic ns.
what two spaces does the pelvic diaphragm separate
pelvis from perineum
what muscle is directly associated with sacrospinous l.
coccygeus m.
