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pelvic floor 11.9
muscles of the pelvic floor
| muscles | origin | insertion | action | intervation |
|---|---|---|---|---|
| levator ani | this muscles is divisible into two parts the puboccygeus and the iliococcygeus muscle | (blank) | (blank) | (blank) |
| pubococcygeus | pubis | coccyx, uretha, anal canal, perineal body of the perineum(wedge shaped mass of fibrous tissue in the center of the perineum) and anococcygeal raphe (narrow fibrous band that extends from anus to coccyx) | supports and maintains position of pelvic viscera, resists increase in intra-abdominal pressure during forced exhalation, coughing vomiting urination and defication, constricts anus,uretha, and vagina | sacral spinal nerves s2 - s4 |
| iliococcygeus | ishial spine | coccyx | supports and maintains position of pelvic viscera, resists increase in intra-abdominal pressure during forced exhalation, coughing vomiting urination and defication, constricts anus,uretha, and vagina | sacral spinal nerves s2 - s4 |
| coccygeus | ishial spine | lower sacrum and upper coccyx | supports and maintains position of pelvic viscera, resists increase in intra-abdominal pressure during forced exhalation, coughing vomiting urination and defication, and pulls coccyx anteriorly following defication or childbirth | sacral spinal nerves s4 -s5 |