Medical Definition of Musculus obliquus internus abdominis
1.
Origin, iliac fascia deep to lateral part of inguinal ligament, anterior half of crest of ilium, and lumbar fascia; insertion, tenth to twelfth ribs and sheath of rectus; some of the fibres from inguinal ligament terminate in the conjoint tendon; action, diminishes capacity of abdomen, flexes lumbar vertebral column (bends thorax forward); nerve supply, lower thoracic.
Synonym: musculus obliquus internus abdominis, abdominal internal oblique muscle.
(05 Mar 2000)
Lexicographical Neighbors of Musculus Obliquus Internus Abdominis
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