(Netter Basic Science) Frank H. Netter - Atlas of Human Anatomy-Elsevier (2018)

Muscle Tables
6
MUSCLE
MUSCLE
GROUP
PROXIMAL
ATTACHMENT (ORIGIN)
Sphincter urethrae Perineal External fibers from
junction of inferior
pubic and ischial rami
and adjacent fascia;
internal fibers pass
medially to surround
membranous urethra
Sphincter
urethrovaginalis
(female only)
Superficial
transverse
perineal
DISTAL
ATTACHMENT
(INSERTION) INNERVATION BLOOD SUPPLY MAIN ACTIONS
Male: median raphe in
front and behind
urethra
Female: encloses
urethra, attaches to
sides of vagina
Perineal Perineal body Passes forward and
anteriorly around
urethra
Perineal
Ischial rami and
tuberosities
Central tendon
(perineal body)
Perineal branches
of pudendal
nerve
Perineal branches
of pudendal
nerve
Perineal branches
of pudendal
nerve
Perineal branch of
internal pudendal
artery
Perineal branch of
pudendal artery
Perineal branch of
internal pudendal
artery
Compresses urethra
at end of
micturition; in
female also
compresses
distal vagina
Sphincter of urethra
and vagina
Stabilizes central
tendon
Muscle Tables
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Table 6.4