KINESIOL 2E03 Study Guide - Midterm Guide: Erector Spinae Muscles, Thoracic Vertebrae, Iliac Crest

• School: McMaster University
• Department: Kinesiology
• Course: KINESIOL 2E03
• Professor: Krista Madsen

Document Summary

Erector spinae: the erector spinae are the back muscles & are made up of, spinalis (most medial, longissimus, iliocostalis (most lateral) Origin/insertion: origin, sacrum, iliac crest these are from the same tendon of origin as the. Iliocostalis muscles: spinous processes of l1-l5, transverse processes of lower thoracic vertebrae, insertion, costal processes of l1-l5, 2nd to 12th ribs, transverse processes of thoracic vertebrae. Actions: bilateral extension of spine (or back, unilateral ipsilateral flexion of spine. Origin/insertion: origin, sacrum, iliac crest they share the same tendon of origin as the longissimus thoracis, superficial layer of thoracolumbar fascia, insertion, 6 to 12th ribs, deep layer of thoracolumbar fascia, transverse processes of upper lumbar vertebrae. Actions: bilateral extension of spine, unilateral ipsilateral flexion. Multifidus: this is a(cid:374) upside dow(cid:374) (cid:862)v(cid:863) shaped (cid:373)uscle that can be viewed once we strip away the layers of the erector spinae.