This muscle is composed of a sternal head and a clavicular head.The fibers originate from the clavicle, sternum and upper ribs and insert on the humerous. When contracted these muscles cause flexion,extension and adduction of the shoulder joint.
Flyes are used to work the muscles of the upper body, primarily the sternal head of the pectoralis major.
The subscapularis and Pectoralis minor and clavicular & sternal heads of the pectoralis major muscles may be short.
 See also: Muscle, Exercise, Triceps, Extension, Anterior
  
|
RSS
