Anatomy: Myology Flashcards
1
Q
What muscles maintain the erection of a penis or clitoris by compressing venous draingage, forcing blood from the crura into the body of the penis or clitoris?
A
Ischiocavernosus M.
Bulbospongiosus M.
2
Q
What nerve innervates all the superficial perineal muscles?
- Superficial transverse perineal M.
- Ischiocavernosus M.
- Bulbospongiosus M.
- (also deep tansverse perineal M.)
A
Deep perineal N.
3
Q
What nerve innervates the external urethral sphincter muscles?
A
dorsal nerve of the penis
4
Q
What is important about the pelvic diaphragm?
A
It separates pelvis from peritoneum
5
Q
What 4 muscles made up the pelvic diaphragm?
A
The 3 levator ani M.’s (puborectalis M. , pubococcygeus M. , Iliococcygeus M.)
+
Caccygeus M.
6
Q
What is the function of the lateral pelvic wall muscles (obturator internus + piriformis)?
A
Rotate thigh laterally
+
Stabilize the femoral head in the acetabulum
