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Deltoid 2

O: shoulder
I: Deltoid tuberosity of humerus
A: Anterior part: flexes and medially rotates arm; Middle part: abducts arm; Posterior part: extends and laterally rotates arm
Wikipedia Questions

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Latissimus Dorsi 2

O: Spine and thoracic vertebrae
I: Floor of intertubercular groove of humerus
A: Extends, adducts, and medially rotates humerus; raises body toward arms during climbing
Wikipedia Questions

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Levator Scapulae 2

O: Back of C1 - C4 vertebrae
I: Superior part of medial border of scapula
A: Elevates scapula and tilts its glenoid cavity inferiorly by rotating scapula
Wikipedia Questions

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Rhomboid Major 1

O: vertebrae T2 - T5
I: medial border of the scapula
A: Retracts the scapula and rotates it
Wikipedia Questions

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Rhomboid Minor 1

O: vertebrae C7 and T1
I: Medial border of scapula
A: Retracts and rotates scapula
Wikipedia Questions

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Trapezius 2

O: C7 - T12 vertebrae
I: Lateral third of clavicle, acromion, and spine of scapula
A: Elevates, retracts and rotates scapula; superior fibers elevate, middle fibers retract, and inferior fibers depress scapula; superior and inferior fibers act together in superior rotation of scapula
Wikipedia Questions