external oblique muscle

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Related to external oblique muscle: Internal oblique muscle, External oblique abdominis muscle, aponeurosis of external oblique muscle

ex·ter·nal ob·lique mus·cle

(eks-tĕr'năl ō-blēk' mŭs'ĕl)
Origin, fifth to twelfth ribs; insertion, anterior half of lateral lip of iliac crest, inguinal ligament, and anterior layer of the rectus sheath; action, diminishes capacity of abdomen, draws thorax downward; nerve supply, thoracoabdominal nerves.
Synonym(s): musculus obliquus externus abdominis [TA] .

external oblique muscle

Abdominal wall muscle. Origin: lower costal margin. Insertion: anterior half of iliac crest, rectus sheath, inguinal ligament. Nerve: intercostals 8-12, iliohypogastric, ilioinguinal (L1). Action: tenses and compresses abdomen, flexes and laterally rotates spine, lowers rib cage.
See also: muscle
References in periodicals archive ?
As the internal oblique muscles on one side of the body rotates, the external oblique muscles on the opposite side fire, enabling the body to perform the twisting action.
Note: Rotary torso machines also provide an effective way to isolate and develop the internal and external oblique muscles.
No studies have looked at the structure or function of transversus abdominis, or the internal oblique or external oblique muscles following pregnancy.

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