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

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Presentation on theme: "Justin R. Stone AH 129 Tortora: Ch 11 Muscles of the Extremities."— Presentation transcript:

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

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

9 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

10 Coccygeus

11 Muscles: Perineum

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

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

14 Superficial Transverse Perineal

15 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

16 Deep Transverse Perineal

17 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

18 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

19 Bulbospongiosus Ischiocavernosus

20 Bulbospongiosus Ischiocavernosus

21

22 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

23 External Anal Sphincter External Urethral Sphincter

24 External Anal Sphincter External Urethral Sphincter

25 PELVIS: Perineum Lab: Pelvis: Perineum Color: Netter’s Flashcards


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