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The sternocleidomastoid muscles are the major muscles that assist you in flexing the neck, along with the longus capitis and a few other small deep muscles of the anterior neck. These flex the neck and head forward or anteriorly.

The splenius capitis, semispinalis capitis and longissimus capitis are the major extensor muscles of the neck. These extend the neck upward and backward or posteriorly.

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15y ago

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