sternomastoid Flashcards

1
Q

sternomastoid sternal head origin

A

anterior surface of manubrium

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2
Q

sternomastoid clavicular head origin

A

upper surface medial 1/3 of clavicle

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3
Q

sternomastoid insertion

A

mastoid process & lateral 1/3 superior nuchal line

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4
Q

sternomastoid direction of fibres

A

superiorly

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5
Q

sternomastoid nerve supply

A

cranial accessory XI, anterior primary rami C2, 3

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6
Q

sternomastoid action

A

both together flex the neck, singly they laterally flex the neck to the same side and rotate to the opposite side

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