Anatomy and Cell Biology 2221 Lecture Notes - Lecture 4: Splenius Cervicis Muscle, Costal Cartilage, Shoulder Joint

• School: Western University
• Department: Anatomy and Cell Biology
• Course: Anatomy and Cell Biology 2221
• Professor: Graham Fraser

Document Summary

Origin: nuchal line of occipital bone; c7-t12. Action: rotation, retraction, elevation and depression of. Insertion: clavicle, acromion and spine of scapula scapula. Origin: articular process and transverse proves of c4-t7. Action: extends head, rotates to opposite side; extends vertebral column. Origin: articular process of c4-c7, transverse process of t1-t4. Action: extends head and vertebral column; rotates head to same side. Neck and back muscles that move the spine. Insertion: inferior surface of spinous process of vertebrae superior to origin. Action: stabilize column during movement; weakly extends. Insertion: spinous process of vertebrae superior to one of origin. Action: extend and laterally flexes column; stabilizes movement. Insertion: transverse processes of vertebrae superior to one of origin. Origin: ligamentum nuchal and spinous process of c7. Action: maintains erect posture, extends/laterally flexes column. Insertion: transverse processes of all thoracic vertebrae, ribs 9-10. Origin: sacrum, ilium, transverse processes of vertebrae. Action: extend column; laterally flex and rotates. Insertion: ribs 5-7/ xiphoid process birth, forced exhalation.