Muscles that Move the Shoulder and Arm

Muscles that Move the Shoulder and Arm

Pectoralis Major

• Functions of the Pectoralis Major Muscle:

  • Flexes the Shoulder:
  • The muscle is responsible for lifting the arm forward, moving it away from the body.
  • Adducts the Shoulder:
  • It brings the arm towards the body, allowing for movements such as bringing the arms down to the sides.
  • Medially Rotates the Shoulder:
  • This involves rotating the arm towards the center of the body.

• Prime Mover in Shoulder Flexion:

  • The pectoralis major is the primary muscle that performs shoulder flexion, signifying that it is the most powerful muscle in executing this specific movement.