Rectus abdominis
Musculus rectus abdominis
A long, flat, paired muscle running vertically on each side of the anterior abdominal wall. Enclosed in the rectus sheath, it originates from the pubic crest and symphysis and inserts on the xiphoid process and costal cartilages of ribs 5-7. Three tendinous intersections create the appearance of a six-pack.
功能
Flexes the trunk (bending forward). Compresses the abdominal viscera for functions including forced expiration, defecation, urination, and childbirth. Stabilizes the pelvis during walking.
临床意义
Diastasis recti is separation of the rectus muscles at the linea alba, common in pregnancy. Rectus sheath hematoma results from epigastric vessel injury. The rectus abdominis free flap is used in breast reconstruction (TRAM flap).
常见问题
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相关结构
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