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head 11.6
muscles that move the head
| muscle | origin | insertion | action | intervation |
|---|---|---|---|---|
| sternocleidomastoid | sternum and clavicle | mastiod process of the temporal bone | acting togather..flex cervical vertebral column acting singly laterally extend and rotate head to side opposite contracting muscle | accessory (xi) nerve |
| semispinalis capitis | transverse process of first 6 or 7 t vertebrae and 7th c vertebrae and articular processes of 4,5,6, cervical vertebrea | occipital bone between superior and inferior nuchal lines | togather..extend head singly... rotate head to side opposite contracting muscle | cervical spinal nerves |
| splenius capitis | ligamentum nuchae and spinous processes of seventh c vertebra and first 3 or 4 t vertebrae | occipital bone and mastoid process fo the temporal bone | togather..extend head singly..laterally flex and rotate head to same side as contracting muscle | cervical spinal nerve |
| longissimus capitis | transverse processes of upper 4 t verterae and acticular processes of last 4 c vertebre | mastoid process of temporal bone | togather extend head singly laterally flex and rotate head ..same side as cotracting muscle | cervical spinal nerve |