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Action: Elevates the first rib; flexes and laterally bends the neckOrigin - Posterior tubercles of the transverse processes of vertebrae C2-C7Insertion - Upper surface of the first rib behind the subclavian arteryInnervation - Brachial plexus, C3-C8

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1.
Action: Elevates the first rib; flexes and laterally bends the neck
Origin - Posterior tubercles of the transverse processes of vertebrae C2-C7
Insertion - Upper surface of the first rib behind the subclavian artery
Innervation - Brachial plexus, C3-C8





 
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