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5 Cards in this Set

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What are the four main origins (proximal attachments) of the trapezius muscle?
1) medial 1/3 of superior
nuchal line
2) external occipital
protuberance
3) nuchal ligament
4) C7-T12 vertebral spines
What are the two main insertions (distal attachments) of the trapezius muscle?
1) posteromedial superior border
of clavicle's lateral third
2) anteromedial superior border
of acromion & scapular spine
What innervates the trapezius muscle?
MOTOR FIBERS: spinal accessory
nerve (CN XI)
PAIN & PROPRIOCEPTIVE FIBERS:
C3 & C4 spinal
nerves
What are the four main actions of the trapezius muscle?
1) Descending (upper) part elevates scapula
2) Ascending (lower) part depresses scapula
3) Middle part (or all parts together) retracts scapula
4) Descending and ascending parts act together to rotate glenoid cavity superiorly
What artery supplies the trapezius muscle?
transverse cervical artery