Rectus sheaths

Definition

Rectus sheaths are fibrous sleeves that enclose the rectus abdominis muscles, providing structural support and protection. They are formed by the aponeuroses of the three flat abdominal muscles (external oblique, internal oblique, and transversus abdominis) wrapping around these vertically oriented muscles.

Related terms

Rectus Abdominis: A major abdominal muscle that extends along the front of the abdomen, playing a key role in flexing the spinal column and stabilizing the core.

Aponeurosis: A fibrous sheet or flattened band of tissue that acts as a tendon to attach muscles to bone or other tissues.

Transversus Abdominis: The deepest layer of abdominal muscles which helps compress the ribs and viscera, providing thoracic and pelvic stability