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neck muscles
muscles of the neck that move the head
| Muscle | Origin | Insertion | Action |
|---|---|---|---|
| Sternocleidomastoid | top of manubrium & medial one third of clavicle | mastoid process of temporal bone & lat half of sup NL of occipital bone | unilat: lateral flexion, rotation bilat: flex neck, assist in elevation of ribs during inhalation |
| Semispinalis capitis | TVP of c4-t5 | between sup & inf nuchal line of occiput | extend vertebral column & head |
| Splenius Capitis | inf one half of ligamentum nuchae & SP of c7-t4 | mastoid process and lat portion of sup NL | unilat: rotate & flex head & neck to same side bilat: extend head&neck |
| Longissimus capitis | TVP of t1-t5 | mastoid process | unilat: lat flex vertebral column bilat: extend VC |