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transversus abdominis

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transversus abdominis
[-vur′səs]
one of a pair of transverse abdominal muscles that is the anterolateral muscle of the abdomen, lying immediately under the internal abdominal oblique. Arising from the inguinal ligament, the iliac crest, the thoracolumbar fascia, and the last six ribs, it inserts into the linea alba. It serves to constrict the abdomen and, by compressing the contents, to assist in urination, defecation, emesis, parturition, and forced expiration. Also called transversalis. Compare pyramidalis, rectus abdominis.


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To date, most ultrasound research has focused on transversus abdominis and lumbar multifidus muscles, because dysfunction of these muscles has been linked to low back pain (Hodges and Richardson 1998, Hodges and Richardson 1999, Hodges 1999, Hodges 2001, Hungerford et al 2003, Yoshihara et al 2001, Zhao et al 2000).
Finally, the transversus abdominis is a rather deep corset of muscle that wraps around the torso and has much to do with breathing.
 
 
 
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