INFRASPINATUS

ORIGIN

Infraspinous fossa of the scapula

 

INSERTION

Middle facet of greater tubercle of the humerus

 

ACTION

External rotation of arm, stabilizes humerus

 

INNERVATION

Suprascapular Nerve (C5, 6)

 

PRIMARY JOINT

Glenohumeral joint

 

KEY STRENGTH TRAINING EXERCISES

Lateral raises

Reverse flyes

 

NEW STRENGTH TRAINING EXERCISES

Shoulder external rotation with resistance bands

Posterior shoulder stretch

 

COMMON INJURIES

Straining/stiffness

Tear