Rectus abdominis muscle

Dr Craig Hacking and Dr Henry Knipe et al.

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.

Anatomy: Abdominopelvic
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Article information

rID: 24536
Section: Anatomy
Tag: stub, refs, cases
Synonyms or Alternate Spellings:
  • Rectus abdominis
  • ReAb

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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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