Muscle Name: Deltoids (Shoulders)

Medical Name:

• Deltoideus

Other Names:

• Delts
• Shoulder Muscles

Head:

• Anterior Deltoid
• Lateral Deltoid
• Posterior Deltoid

Movement:

• Anterior Deltoid:
  • Flexion of the shoulder (raising the arm forward)
  • Medial rotation of the shoulder (rotating the arm inward)
  • Horizontal adduction of the shoulder (moving the arm across the body)
• Lateral Deltoid:
  • Abduction of the shoulder (raising the arm out to the side)
• Posterior Deltoid:
  • Extension of the shoulder (bringing the arm backward)
  • Horizontal abduction of the shoulder (moving the arm away from the body in the horizontal plane)
  • Lateral rotation of the shoulder (rotating the arm outward)

Attachment:

• Origin:
  • Anterior Deltoid: Lateral third of the clavicle
  • Lateral Deltoid: Acromion process of the scapula
  • Posterior Deltoid: Spine of the scapula
• Insertion:
  • Deltoid tuberosity of the humerus

Related Muscles:

• Supraspinatus
• Trapezius
• Teres Major
• Infraspinatus
• Pectoralis Major
• Biceps Brachii
• Latissimus Dorsi

EXERCISES

COMMUNITY