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Neck Muscles used to Shake and Nod

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Name and describe the action of muscles used to shake your head no and to nod yes.

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Solution Summary

The names, descriptions, and and actions of muscles used to shake and nod your head are given in this solution.

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There are four muscles of the neck that move the head. They are:

sternocleidomastoid
semispinalis capitis
splenius capitis
longissimus capitis.

Their movements are a bit complicated.

First, we'll outline "yes" movements.

If you contract both sternocleidomastoid muscles, you will draw the head forward as they will flex the cervical part of the vertebral column. If you ...

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