sternomastoid Flashcards
1
Q
sternomastoid sternal head origin
A
anterior surface of manubrium
2
Q
sternomastoid clavicular head origin
A
upper surface medial 1/3 of clavicle
3
Q
sternomastoid insertion
A
mastoid process & lateral 1/3 superior nuchal line
4
Q
sternomastoid direction of fibres
A
superiorly
5
Q
sternomastoid nerve supply
A
cranial accessory XI, anterior primary rami C2, 3
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