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Muscles of the Extremities

Muscles of the Extremities. Justin R. Stone AH 129 Tortora : Ch 11. Muscles: Pelvic Floor and Perineum. Pelvic Floor Levator Ani Pubococcygeus Iliococcygeus Superficial Transverse Perineal Perineum Bulbospongiosus Ischiocavernosus Deep Transverse Perineal External Urethral Sphincter

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Muscles of the Extremities

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  1. Muscles of the Extremities Justin R. Stone AH 129 Tortora: Ch 11

  2. Muscles:Pelvic Floor and Perineum

  3. Pelvic Floor • Levator Ani • Pubococcygeus • Iliococcygeus • Superficial Transverse Perineal Perineum • Bulbospongiosus • Ischiocavernosus • Deep Transverse Perineal • External Urethral Sphincter • External Anal Sphincter

  4. PELVIS:Pelvic Floor • Levator Ani • Pubococcygeus • Iliococcygeus • Coccygeus

  5. PELVIS:Pelvic Floor • Levator Ani • Most important muscle of pelvic floor • Counters force of Valsalva • Constricts/Forms Sphincters of Anus, Urethra, and Vagina • N: S2-4 • 2 Divisions: • PuboCoccygeus • Iliococcygeus

  6. PELVIS:Pelvic Floor • PuboCoccygeus • O/I: • O: Pubis • I: Coccyx, Urethra, Anal Canal, Perineal Body of the Perineum, Anococcygeal Raphe (*All Insertions are Midline) • Iliococcygeus • O: • O: Ischial Spine • I: Coccyx

  7. Levator Ani Pubococcygeus Iliococcygeus

  8. PELVIS:Pelvic Floor • Coccygeus • O/I: • O: Ischial Spine • I: Sacrococcygeal Junction • N: S4-5 • A: • Pulls coccyx anteriorly following defecation or childbirth • Assists in countering force of Valsalva

  9. Coccygeus

  10. Muscles:Perineum

  11. PELVIS:Pelvic Floor and Perineum • Superficial Transverse Perineal • Bulbospongiosus • Ischiocavernosus • Deep Transverse Perineal • External Urethral Sphincter • External Anal Sphincter

  12. PELVIS:Perineum • Superficial Transverse Perineal • O/I: • O: Ischial Tuberosity • I: Perineal Body of Perineum • N: Pudendal • A: Stabilizes Perineal Body of Perineum

  13. Superficial Transverse Perineal

  14. PELVIS:Perineum • Deep Transverse Perineal • O/I: • O: Ischial Rami • I: Perineal Body of Perineum • N: Pudendal • A: Aids in expelling last drops of urine and semen

  15. Deep Transverse Perineal

  16. PELVIS:Perineum • Bulbospongiosus • O/I: • O: Perineal Body of Perineum • I: • Male: Perineal membrane of deep muscles of perineum and dorsal penis • Female: Pubic arch, root of dorsal clitoris • N: Pudendal • A: • Aids expulsion of urine and semen • Assists in erection of penis/clitoris

  17. PELVIS:Perineum • Ischiocavernosus • O/I: • O: Ischial Tuberosity • O: Ischial and Pubic Rami • I: • Male: Corpus Cavernosum of Penis • Female: Clitoris • N: Pudendal • A: Maintains erection of penis/clitoris

  18. Bulbospongiosus Ischiocavernosus

  19. Bulbospongiosus Ischiocavernosus

  20. PELVIS:Perineum • External Anal Sphincter • O/I: • O: Annococcygeal Ligament • I: Perineal Body of Perineum • N: Pudendal, S4 • A: Maintains closure of Anal Canal and Anus • External Urethral Sphincter • O/I: • O: Ischial and Pubic Rami • I: • Male: Median Raphi • Female: Vaginal Wall • N: Pudendal, S4 • A: Helps expel last drops of urine/semen

  21. External Anal Sphincter External Urethral Sphincter

  22. External Anal Sphincter External Urethral Sphincter

  23. PELVIS: Perineum • Lab: Pelvis: Perineum • Color: Netter’s • Flashcards

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