Pelvic and Perineal Muscles: Origin and Insertion Flashcards
Origin (Female Urogenital Muscles)
- Bulbospongiosus
- Sphincter urethrae
- Ischiocavernosus
- Superficial transverse perineal muscle
- Deep transverse perineal muscle
A. Ischial tuberosity
B. Pubic arch
C. Ischial ramus
D. Perineal body
- D. Perineal body
- B. Pubic arch
- A. Ischial tuberosity
- A. Ischial tuberosity
- C. Ischial ramus
Insertion (Female Urogenital Muscles)
- Bulbospongiosus
- Sphincter urethrae
- Ischiocavernosus
- Superficial transverse perineal muscle
- Deep transverse perineal muscle
A. Surrounds urethra
B. Fascia of vestibular bulb
C. Perineal body
D. Fascia covering corpus cavernosum
- B. Fascia of vestibular bulb
- A. Surrounds urethra
- D. Fascia covering corpus cavernosum
- C. Perineal body
- C. Perineal body
Origin (Muscles of Superficial Perineal Pouch in Males)
- Bulbospongiosus
- Ischiocavernosus
A. Perineal body, midline raphae (in men)
B. Ischial tuberosity and ramus
- B. Ischial tuberosity and ramus
- A. Perineal body, midline raphae (in men)
Insertion (Muscles of Superficial Perineal Pouch in Males)
- Bulbospongiosus
- Ischiocavernosus
A. Fascia covering corpus cavernosum
B. Fascia of the bulb of penis and corpus spongiosum and cavernosum
- B. Fascia of the bulb of penis and corpus spongiosum and cavernosum
- A. Fascia covering corpus cavernosum
Origin (Muscles of the Anal Triangle External Anal Sphincter)
- Subcutaneous part
- Superficial part
- Deep part
- Puborectalis muscle
A. Perineal body
B. Pubic bone
C. Encircles anal canal, no bony attachment
- C. Encircles anal canal, no bony attachment
- A. Perineal body
- C. Encircles anal canal, no bony attachment
- B. Pubic bone
Insertion (Muscles of the Anal Triangle External Anal Sphincter)
- Subcutaneous part
- Superficial part
- Deep part
- Puborectalis muscle
A. Coccyx
B. Slings around anorectal junction
C. None
- C. None
- A. Coccyx
- C. None
- B. Slings around anorectal junction
Origin (Pelvic muscles)
- Piriformis
- Obturator internus
- Levator ani
- Coccygeus
A. Spine of ischium
B. Front of lateral mass of the sacrum
C. Body of pubis, fascia of obturator internus, spine of ischium
D. Obturator membrane and adjoining part of hip bone
- B. Front of lateral mass of the sacrum
- D. Obturator membrane and adjoining part of hip bone
- C. Body of pubis, fascia of obturator internus, spine of ischium
- A. Spine of ischium
Insertion (Pelvic muscles)
- Piriformis
- Obturator internus
- Levator ani
- Coccygeus
A. Perineal body, anococcygeal body, wall of prostate, vagina, rectum and anal canal
B. Lower end of sacrum and coccyx
C. Greater trochanter of femur
- C. Greater trochanter of femur
- C. Greater trochanter of femur
- A. Perineal body, anococcygeal body, wall of prostate, vagina, rectum and anal canal
- B. Lower end of sacrum and coccyx
TRUE OR FALSE: The levator ani has 3 parts: anterior, intermediate, and posterior fibers.
True
TRUE OR FALSE: The puborectalis, part of the levator ani, forms a sling around junction of rectum and anal canal.
True
TRUE OR FALSE: The anococcygeal body is a small fibrous mass between the tip of the coccyx and anal canal.
True
Insertion of the levator ani muscles
- Passes posteriorly to insert the anococcygeal body
- Anococcygeal body and coccyx
- Fibromuscular structure called perineal body (in front of anal canal)
A. Levator prostatae (male) / Sphincter vaginae (female)
B. Iliococcygeus
C. Pubococcygeus
D. Puborectalis
- C. Pubococcygeus
- B. Iliococcygeus
- A. Levator prostatae (male) / Sphincter vaginae (female)
TRUE OR FALSE: The anterior fibers of the levator ani, the levator prostatae (male) or sphincter vaginae (female), form a sling around the prostate or vagina respectively.
True
Modified TF
A. The iliococcygeus comprises the intermediate fibers of the levator ani.
B. The puborectalis and pubococcygeus comprise the posterior fibers of the levator ani.
FF
A. The iliococcygeus comprises the posterior fibers of the levator ani.
B. The puborectalis and pubococcygeus comprise the intermediate fibers of the levator ani.
