THE PELVIC FLOOR MUSCLES ARE:-
1) CREMASTOR
Origin : From inguinal ligament.
Insertion : Around spermatic cord and the testis .
Action : Elevation of testis.
Nerve supply : Genitofemoral nerve.
2) DARTOS
Origin : Penis and the subcutaneous connective tissue of scrotum.
Insertion : Skin of scrotum and penis.
Action : Elevation of the testis.
Nerve supply : Sympathetic nerve fibers.
3) EXTERNAL ANAL SPHINCTER
Origin : Perineal body .
Insertion : ON Encircles anal canal , superficial fibers attach to coccyx.
Action : Constricts anal canal .
Nerve supply : Parasympathetic fibers from S4.
4) BULBOSPONGIOSUS IN FEMALE
Origin : From Perineal body .
Insertion : Perineal membrane .
Action: Vestibular bulb compression.
Nerve supply : Deep branch of peroneal nerve.
5) BULBOSPONGIOSUS IN MALE
Origin : Central tendinous point.
Insertion : perineal membrane.
Action : Bulb of penis compression.
Nerve supply : Deep branch of peroneal nerve.
6) COCCYGEHS
Origin. : Ischial spine.
Insertion : Side of coccyx and lower sacrum.
Action : Elevation of pelvic floor.
Nerve supply : Ventral rami of spinal cord.
7) DEEP TRANSVERSE PECTINEUS
Origin : Medial surface of Ischial ramus.
Insertion : perineal body / central tendinous point.
Action : Flexion and stabilize perineal body.
Nerve supply : perineal nerve.
8) DETRUSOR OF BLADDER
Origin : smooth muscles in wall of urinary bladder.
Insertion :ON Fascicles are arranged roughly in 3 layers.
Action : Compression of the urinary bladder
Nerve supply : splanchnic nerve.
9) ILIOCOCCYGEUS
Origin : FROM Arcus tendineus levator ani and the Ischial spine.
Insertion : Anococcygeal raphe and the coccyx.
Action : Elevation of pelvic floor.
Nerve supply : ventral primary Rami of spinal nerve.
10) ISCHIOCAVERNOSUS
Origin :FROM Medial surface of the Ischial tuberosity .
Insertion : corpus cavernosum.
Action : compression of corpus cavernosum.
Nerve supply : perineal nerve.
11) LEVATOR ANI
Origin : Posterior surface of body of pubis.
Insertion : Anococcygeal raphe and coccyx.
Action : Elevation of pelvic floor.
Nerve supply : Spinal nerve ( S3 – S4 ).
12) LEVATOR PROSTATEA
Origin : posterior aspect of the pubis.
Insertion : fascia of prostate.
Action : Elevation of prostate.
Nerve supply : Spinal nerve ( S3- S4 ).
13 ) PUBLCOCCYGEUS
Origin : Posterior aspect of superior pubic Ramis.
Insertion : Coccyx
Action : Elevation of pelvic floor.
Nerve supply : Spinal nerve ( S3- S4 ).
14) PUBORECTALIS
Origin : Posterior aspect of body of pubis.
Insertion : Posterior to the rectum.
Action : Support abdominal and pelvic organs and provide stability .
Nerve supply : Spinal nerve ( S3 – S4 ) .
15) PUBOVAGINALIS
Origin : Posterior aspect of body of pubis.
Insertion : Fascia of vagina and perineal body .
Action : Draws the vagina forward and superiorly.
Nerve supply : Spinal nerve ( S3- S4) .
16) SPHINCTER URETHRAE IN MALE
Origin : Encircle the urethra.
Insertion : Encircles urethra.
Action : Compression of urethra.
Nerve supply : Perineal nerve.
17) SPHINCTER URETHRAE IN FEMALES
Origin : Encircles urethra.
Insertion : Encircles urethra and vagina.
Action : Compression of urethra and vagina.
Nerve supply : Perineal nerve.
18) SUPERFICIAL TRANSVERSE PERINEUS
Origin : medial surface of the Ischial ramus.
Insertion : contralateral muscle and perineal body.
Action : Flexion and stabilizes perineal body / central tendinous point.
——-end of pelvic floor muscle……
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