Pelvic and Perineal Muscles: Action Flashcards
Action (Female Urogenital Muscles)
- Bulbospongiosus
- Sphincter urethrae
- Ischiocavernosus
- Superficial transverse perineal muscle
- Deep transverse perineal muscle
A. Fixes perineal body
B. Voluntary sphincter of urethra
C. Sphincter of vagina and assists in erection of clitoris
D. Assists in erection of clitoris
- C
- B
- D
- A
- A
Action (Muscles of Superficial Perineal Pouch in Males)
- Bulbospongiosus
- Ischiocavernosus
A. Assist in erection of penis
B. Compress the urethra and assist in erection of penis
- B
- A
Action (Muscles of the Anal Triangle External Anal Sphincter)
- Subcutaneous part
- Superficial part
- Deep part
- Puborectalis muscle
A. Together with puborectal muscle forms voluntary sphincter
B. Together with external anal sphincter forms voluntary sphincter for anal canal
- A
- A
- A
- B
TRUE OR FALSE: The piriformis and obturator internus are lateral rotators of the femur at the hip joint.
True
TRUE OR FALSE: The coccygeus flexes the coccyx and also assists the levator ani in supporting the pelvic viscera.
True
TRUE OR FALSE: The levator ani serves to support the pelvic viscera, particularly during defacation. It has an important sphincter to the anorectal junction, and in females, sphincter to the vagina.
True
TRUE OR FALSE: The levator ani muscles of two sides form an efficient muscular sling that supports and maintains pelvic viscera in position.
True
Modified TF
A. The levator prostatae supports the prostate for males
B. The sphincter vaginae constricts the vagina for females.
TT
Note: The anterior fibers of the levator ani also stabilize the perineal body.
Modified TF
A. The contraction of the puborectalis greatly assists the anal sphincters in maintaining continence, pulling the anorectal junction upward and forward.
B. During defecation, the puborectalis fibers constrict with the anal sphincters.
TF
B. During defecation, the puborectalis fibers relax with the anal sphincters.
TRUE OR FALSE: The levator ani resists a rise in intrapelvic pressure during straining and explosive efforts of abdominal muscles, such as during coughing.
True
