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posterior triangles of the neck > Sternocleidomastoid Muscle > Flashcards

Sternocleidomastoid Muscle Flashcards

1
Q

What is the origin of the sternocleidomastoid M.?

A

Manubrium of sternum

medial clavicle

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2
Q

What is the insertion of the sternocleidomastoid M?

A

Mastoid process of skull

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3
Q

What is the innervation of thesternocleidomastoid M?

A

Spinal accessory nerve (CN XI)

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4
Q

What is the action of thesternocleidomastoid M?

A

unilaterally rotates head to opposite side

bilaterally pulls head down

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5
Q

What is deep to the sternocleidomastoid M?

A

common carotid artery

internal jugular vein

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posterior triangles of the neck (8 decks)

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