Shoulder Girdle Anatomy and Function

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5 Questions

Which muscle is responsible for the protraction and upward rotation of the scapula?

Serratus anterior

What is the innervation of the Serratus anterior muscle?

Long thoracic nerve

Which joint connects the shoulder girdle bones to the axial skeleton anteriorly?

Sternoclavicular joint

Which muscle is responsible for depression and stabilization of the clavicle?

Subclavius

Which nerve is involved in the innervation of the Pectoralis minor muscle?

Medial pectoral nerve

Study Notes

Muscles of the Scapula

  • The Serratus anterior muscle is responsible for the protraction and upward rotation of the scapula.
  • The Serratus anterior muscle is innervated by the long thoracic nerve (C5-C7).

Shoulder Girdle Joints

  • The sternoclavicular joint connects the shoulder girdle bones to the axial skeleton anteriorly.

Pectoralis Minor Muscle

  • The Pectoralis minor muscle is responsible for depression and stabilization of the clavicle.
  • The Pectoralis minor muscle is innervated by the medial pectoral nerve (C6-C8).

Test your knowledge of the components, movements, and muscles associated with the shoulder girdle. Learn about the connections to the axial skeleton and the functional significance of the shoulder girdle in increasing range of movement for the upper limb.

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