ANATOMY

Detailed explanation-1: -The term rectus means that the fibers are parallel; the rectus abdominus is, guess where, on the abdomen, and its fibers are parallel to the linea alba (which is on the midline).

Detailed explanation-2: -Divarication of the rectus muscles The paired rectus abdominis muscles normally lie parallel to each other with their medial borders 1–2 cm apart and separated by the midline linea alba.

Detailed explanation-3: -Direction of muscle fibers: The terms rectus (parallel), transverse (perpendicular), and oblique (at an angle) in muscle names refer to the direction of the muscle fibers with respect to the midline of the body.

Detailed explanation-4: -In the thigh, the hamstring and other flexor muscles have fibers that run parallel to the long axis of the muscle. Because these muscles are so long, individual muscle fibers don’t extend the entire length of the muscle.

Detailed explanation-5: -Structure. The rectus abdominis muscle is paired muscle that runs vertically, either side of the linea alba, on the anterior surface of the abdominal wall.