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

2. Muscles: Pelvic Floor and Perineum

3. Pubococcygeus Iliococcygeus Pelvic Floor Levator Ani
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 Most important muscle of 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. PuboCoccygeus Iliococcygeus PELVIS: Pelvic Floor 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

9. PELVIS: Pelvic Floor Coccygeus N: S4-5 A: 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 N: Pudendal
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 N: Pudendal
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 O/I: N: Pudendal A: Bulbospongiosus
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 O/I: N: Pudendal
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

22. PELVIS: Perineum External Anal Sphincter External Urethral 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: Ischial and Pubic Rami I:
Male: Median Raphi
Female: Vaginal Wall
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