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The rectus abdominis has many sources of arterial blood supply. Classification of the vascular anatomy of muscles: First, the inferior epigastric artery and vein (or veins) run superiorly on the posterior surface of the rectus abdominis, enter the rectus fascia at the arcuate line, and serve the lower part of
The linea alba is a white, fibrous band that is made of the bilateral rectus sheaths that join at the anterior midline of the body. These enclose the rectus abdominis muscles (a pair of long, linear muscles, commonly called the “sit-up” muscles) that originate at the pubic crest and pubic symphysis, and extend the length of the body’s trunk.
The tendonous sheath extending from the external obliques cover the rectus abdominis. The rectus abdominis is the muscle that very fit people develop into "six-pack" abs, though there are five vertical sections on each side. The two bottom sections are just above the pubic bone and usually not visible. The rectus abdominals' function is to bend ...
A posterior rectus sheath composed of the posterior portion of the aponeurosis of the internal oblique muscle and the aponeurosis of the transversus abdominis passes behind the rectus abdominis muscle. [2] [3] All aponeuroses of the rectus sheath unite at (and and decussate across) the midline, forming the linea alba. [3] Below the arcuate line
rectus abdominis: 2 1 longissimus capitis Torso/Neck, Back, right/left articular processes of C4-C7; transverse processes of T1-T5 posterior margin of mastoid process: lateral sacral artery: posterior branch of spinal nerve: extends/flexes vertebral column, flexes head and neck to same side rectus abdominis: 2 1 longissimus colli Torso, Back ...
As the superior (or proximal) pair of rectus abdominis muscles contract, the vertebral column is able to slightly flex forward. [citation needed] If more forward flexion is needed, the middle pair of rectus abdominis muscles can contract along with the distal pair to allow the vertebral column to flex forward even further. [citation needed]
Digital Art by Sofia Kraushaar. Muscles Worked: A plank is a full-body exercise, but specifically, it works your transverse abdominis, rectus abdominis (aka the six-pack), internal and external ...
The arcuate line of rectus sheath (the arcuate line or the semicircular line of Douglas) is a line of demarcation [1] corresponding to the free inferior margin of the posterior layer of the rectus sheath [2] inferior to which only the anterior layer of the rectus sheath is present [3] and the rectus abdominis muscle is therefore in direct contact with the transversalis fascia. [1]