KINESIOL 2E03 Study Guide - Midterm Guide: Thoracolumbar Fascia, Iliac Crest, Rectus Sheath
21 Sep 2016
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Action: unilateral: bends the trunk to the same side bilateral: bearing down and expiration. 6th 12th ribs, deep layer of thoracolumbar fascia. Action: unilateral: contraction bends the spine laterally to the same side bilateral: contraction extends the spine. Innervation: lateral branches of dorsal rami of spinal nerves c8-l1. Origin: cartilages of the 5th 7th ribs, xiphoid process of the sternum. Action: flexes the lumbar spine, straightens the pelvis, expiration, maintenance of abdominal tone (abdominal press) Origin: outer surface of the 5th 12th ribs. Insertion: outer lip of the iliac crest anterior layer of the rectus sheath, linea alba. Action: unilateral: bends the trunk to the same side, rotates trunk to opposite side bilateral: flexes the trunk, straightens pelvis, expiration, maintenance of abdominal tone(abdominal press) Origin: inner surfaces of the 7th 12th costal cartilages deep layer of the thoracolumbar fascia inner lip of the iliac crest anterior superior iliac crest lateral part of the inguinal ligament.
