Pelvic and Perineal Muscles: Innervation

Question 1

TRUE OR FALSE: The perineal branch of the pudendal nerve innervates the female urogenital muscles (i.e., bulbospongiosus, sphincter urethrae, ischiocavernosus, and superficial and deep transverse perineal muscles).

Answer 1

True

Question 2

TRUE OR FALSE: The perineal branch of the pudendal nerve innervates the muscles of the superficial perineal pouch in males (i.e.,
bulbospongiosus and ischiocavernosus).

Answer 2

True

Question 3

Nerve (Muscles of the Anal Triangle External Anal Sphincter)

1. Subcutaneous part
2. Superficial part
3. Deep part
4. Puborectalis muscle

A. Perineal branch of 4th sacral nerve and from perineal branch of pudendal nerve
B. Inferior rectal nerve and perineal branch of 4th sacral nerve

Answer 3

1. B
2. B
3. B
4. A

Question 4

Nerve (Pelvic muscles)

1. Piriformis
2. Obturator internus
3. Levator ani
4. Coccygeus

A. Branch of 4th and 5th sacral nerves
B. Sacral plexus (1st and 2nd sacral nerves)
C. Nerve to obturator internus (sacral plexus)
D. Perineal branch of 4th sacral nerve and perineal branch of pudendal nerve

Answer 4

1. B
2. C
3. D
4. A