Action: Elevates the second rib; flexes and laterally bends the neckOrigin - Posterior tubercles of the transverse processes of vertebrae C5-C7Insertion - Lateral surface of the second ribInnervation - Brachial plexus, C7-C8

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1.
Action: Elevates the second rib; flexes and laterally bends the neck
Origin - Posterior tubercles of the transverse processes of vertebrae C5-C7
Insertion - Lateral surface of the second rib
Innervation - Brachial plexus, C7-C8