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IOAN

muscles of the Cervical spine

MusclesOriginInsertionActionInnervation
sternocleinoidmastoid sternum and clavical mastoid process bilateral: flexes neck and hyperextends head. unilaterally: laterally bends the head to the opposite side spinal accessory nerve (cranial nerve XI) second and third cervical nerves
scalene Transverse Processes of cervical vertebrae First and second Rib Bilateral: assists in neck flexion Unilateral: Neck Lateral bending lower cervical nerves (C3-C8)
splenius capitis lower half of nuchal ligament and spinous process of C7 through T# lateral occipital bone and mastoid process bilateral: extends head and neck. Unilateral: laterally bends neck and rotates face to same side. Middle and lower cervical nerves.
splenius cervicis spinous process of T3-T6 transverse process of C1-C3 bilateral: extends neck Unilateral: bends neck and rotates the face to the sam eside. middle and lower cervical nerves
upper trapezius occipital bone and nuchal ligament on upper cervical cervical spinous process. outer third of clavicle and acromion process scapular elevation and upward rotation spinal accessory (cranial nerve XI)
levator scapula Transverse Processes of first four cervical vertebrae vertebral border of scapula between the superior and spine scapular elevation and downward rotation Third and Fourth cervical nerves and dorsal scapular nerve.
Created by: j2dap595
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