Muscles of Anterior Torso

background E D C B A outline

Sternocleidomastoid

Trapezius

Pectoralis Major

Extends from sternum and clavicle to insert on humerus; adduction and flexion of arm

Deltoid

Shaped like a triangle; Greek letter delta is a ∆ abducts the arm; anterior fibers are used in flexion of arm; posterior fibers are used in extension of arm

Pectoralis Minor

Under pectoralis major; draws scapula forward and downward; raises ribs

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