Which of these muscles is the most superficial and lateral muscle of the abdominal muscles?
A) external oblique
B) internal oblique
C) transverse abdominis
D) rectus abdominis
A
Explanation:
A) external oblique
B) The internal oblique (A) lies deep to the external oblique and is the second of the three lateral layers of the abdominal wall
C) The transverse abdominis (B) is deep to the internal oblique, has fibers that run transversely across the abdomen, and forms the deepest layer of the abdominal wall.
D) The rectus abdominis (C) is the abdominal muscle where the external oblique, internal oblique, and transverse abdominis all insert. It is a long, ribbon-like muscle in the midline of the ventral surface of the abdomen.
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