rectus abdominis muscle

The rectus abdominis muscle is strap-like in appearance and forms part of the anterior abdominal wall and is enclosed by the rectus sheath.


Gross anatomy

The rectus abdominis has three-to-four horizontal tendinous intersections that divide the muscle into segments, which are often incomplete posteriorly. It is divided into two halves by the vertical linea alba. Laterally, the rectus sheath fuses to form the linea semilunaris.

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