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Extend the forearm at elbow

Draws the arm forward and toward the body

Draws shoulder blade forwar, helps raised arm, assists in the lateral rotation of the trunk

compresses the abdomen, assists in lateral rotation of the trunk

depresses the thoracic (chest) cavity, compresses the abdomen, bends the backbone

flexes the forearm at the elbow

raises the arm

lift the shoulder blade, braces the shoulder, draw the head back

rotates and draws the arm backward and toward the body

extends and rotates the thigh outward when walking, running, and climbing