ANTR 350 Lecture 7: 01/18 Selected Axial Muscles
Document Summary
Selected axial muscles-chapter 10 axial muscles: describe the attachments and actions of the following muscles: Sternocleidomastoid (scm) (10. 3. 6 muscles of the anterior neck) Attachments: superior - mastoid process of temporal bone, inferior - clavicle and sternum. Actions: bilateral - head/neck flexion, unilateral - contralateral rotation & ipsilateral side bnding/lateral flexion, erector spinae muscle group (10. 4. 2 erector spinae muscles) (postural, hold you up muscles, keeps your spine erect) Attachments: superior - angle of ribs, transverse processes, mastoid process. 3 long vertical muscles fan out across the back. Iliocostalis: mnemonic i love spaghetti , lateral to medial, iliocostalis, longissimus, spinalis. Unilateral-ipsilateral (same) side-bending/lateral flexion: transversospinalis muscle group. (10. 4. 3 transversospinalis muscles) Short muscle fibers run 2-6 vertebral levels in length. Bilateral - stabilization & extension of vertebral column/head. Unilateral - contralateral rotation: explain how unilateral muscle contraction is different from bilateral muscle contraction in terms of muscle actions of axial muscles (see pop up definitions in.
