Advanced Deep Transverse Perineal Muscle Quiz

Q1. A lesion of the motor fibers in the deep branch of the perineal nerve could directly weaken which muscle?

• Rectal circular smooth muscle
• Internal anal sphincter
• Detrusor
• Deep transverse perineal

Q2. Damage to the deep transverse perineal muscle would most directly reduce stability of which structure?

• Femoral head
• Acetabulum
• Sacral promontory
• Perineal body

Q3. Why can injury to the perineal body affect the function of the deep transverse perineal muscle?

• The perineal body provides an attachment for the muscle
• The perineal body contains the sacral plexus
• The perineal body contains the pudendal nerve trunk
• The perineal body forms the hip joint capsule

Q4. A patient has intact autonomic control of the pelvic viscera but weakness of the deep transverse perineal muscle. Which neural pathway is most likely affected?

• Vagal parasympathetic fibers
• Somatic motor fibers of the pudendal nerve
• Parasympathetic fibers of the pelvic splanchnic nerves only
• Sympathetic fibers of the hypogastric nerves only

Q5. Which anatomical feature explains the name transverse in deep transverse perineal muscle?

• Its fibers spiral around the anal canal
• Its fibers pass from the ischiopubic region toward the midline
• Its fibers run longitudinally along the femur
• Its fibers descend vertically from the sacrum

Q6. Which relationship best explains why the deep transverse perineal muscle is considered part of the supportive apparatus of the pelvic outlet?

• It attaches the femur to the pelvis
• It links the lateral perineum with the central perineal body
• It forms the entire levator ani
• It suspends the uterus directly from the sacrum

Q7. Why may descriptions of the deep transverse perineal muscle differ between male and female anatomy?

• The muscle is less distinctly defined in females
• The muscle is supplied by the femoral nerve in females
• The muscle forms the anal sphincter in females
• The muscle is smooth muscle only in females

Q8. A surgical injury in the deep perineal region damages both the deep transverse perineal muscle and the external urethral sphincter complex. Which combination of functions could be affected?

• Perineal support and voluntary urinary continence
• Hip extension and knee flexion
• Intestinal peristalsis and bile secretion
• Diaphragmatic respiration and swallowing

Q9. Which finding would most strongly suggest dysfunction of a supportive perineal muscle rather than a pelvic visceral smooth muscle?

• Failure of the internal anal sphincter to contract
• Reduced stabilization of the perineal body
• Loss of rectal peristalsis
• Loss of detrusor contraction

Q10. Which statement best integrates the anatomy and function of the deep transverse perineal muscle?

• It is an autonomic sphincter surrounding the anal canal
• It is a deep perineal skeletal muscle that helps stabilize the perineal body and urogenital region
• It is a pelvic smooth muscle responsible for bladder emptying
• It is a superficial gluteal muscle responsible for hip extension