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Neck Muscles
11.3--Muscle Groups
Term | Definition |
---|---|
Trapezius | Extends head |
Sternocleidomastoid | O: Clavicular head: medial 1/3 of clavicle; Sternal Head: manubrium of sternum I: Mastoid Process of temporal bone Action: Flex cervical vertebrae, flex head; lateral rotation; elevate sternum |
Semispinalis Capitis | O: Articular processes of C4-C6; Transverse processes of C7-T7 I: Occipital Bone O: Extend head, rotate head |
Spelnius Capitis | O: Spinous processes of C7-T4 I: Occipital bone and mastoid process of temporal bone A: Act together, extend head, rotate head |
Longissimus Capitis | O: Articular process of C4-C7 and transverse processes of T1-4 I: Mastoid process of temporal bone A: Act together, extend head, lateral flexion and rotation same side |
Spinalis Capitis | O: Absent or small I: Occipital bone A: Extension of head |