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Rectus abdominis muscle

Last revised by Assoc Prof Craig Hacking on 15 Aug 2021

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

Summary

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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Cases and figures

  • Case 1: 3D VR non-contrast
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  • Figure 1: rectus sheath (diagram)
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  • Figure 2: anterior abdominal wall (Gray's illustrations)
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