external oblique (muscle)
Definition: flat muscle of abdomen; origin, external surfaces of fifth to twelfth ribs; insertion, anterior half of lateral lip of iliac crest and inguinal ligament inferiorly, and continuing medially as part of the anterior layer of the rectus sheath; action, supports and compresses abdominal viscera; flexes and rotates trunk; nerve supply, thoracoabdominal nerves.
Synonym(s): musculus obliquus externus abdominisTA, abdominal external oblique (muscle)
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