Movement- raise right arm

Abby Hinton

Muscles used: Pectoralis major, and anterior fibers of the deltoid

Bones used: Humerus, scapula, radius, ulna, elbow, wrist

What is muscle origin Is arm raising flexion or

and insertion? extension?

During muscle contraction, one end of the muscle is fixed in its position, while the other end moves during contraction. The origin is the attachment site that doesn't move during contraction, while the insertion is the attachment site that does move when the muscle contracts. The site of muscle origin and insertion is the clavicle and the humerous.

Lifting your arm up in front of your body is considered to be a shoulder flexion.

Abby Hinton