Muscles

Prime mover of the arm Flexion and it is large in fan shaped

• Supraspinatus

• Pectoralis Major

• Deltoid Anterior

• Latissimus Dorsi

Prime movers for shoulder Abduction!

• Infraspinatus

• Deltoid

• Pectoralis Major

• Latissimus Doris

Anterior Fibers: Flexes Shoulder

Posterior Fibers: Extends the Shoulder

• Supraspinatus

• Deltoid

• Pectoralis Major

• Latissimus Dorsi

An antagonist to Latissimus Dorsi in shoulder Flexion and Abduction

• Supraspinatus

• Deltoid

• Pectoralis Major

• Latissimus Dorsi

Prime mover for shoulder Extension & Adduction!

• Supraspinatus

• Latissimus Dorsi

• Pectoralis Major

• Deltoid

Antagonist to Deltoid in shoulder Extension and Adduction

• Latissimus Dorsi

• Deltoid

• Pectoralis Major

• Supraspinatus

Initiation of shoulder Abduction

• Infraspinatus

• Supraspinatus

• Teres Minor

• Supscapularis

External rotation of shoulder

• Supraspinatus

• Infraspinatus

  Teres Minor

• Supscapularis

Internal Rotation of shoulder

• Supscapularis

• Infraspinatus

• Teres Minor

• Supraspinatus

Prime Movers of the Shoulder Joint:

• FLEXION

• Latissimus Dorsi

• Pectoralis Major

• Deltoid (anterior part)

• Infraspinatus