Questions and Answers
Which joint connects the shoulder girdle bones to the axial skeleton anteriorly?
Sternoclavicular joint
Which muscle is responsible for depression of the shoulder and protraction of the scapula?
Pectoralis minor
Which nerve innervates the subclavius muscle?
Nerve to subclavius
What is the origin of the serratus anterior muscle?
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Which action is primarily associated with the serratus anterior muscle?
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Study Notes
Shoulder Anatomy
- The sternoclavicular joint connects the shoulder girdle bones to the axial skeleton anteriorly.
Muscle Functions
- The pectoralis minor muscle is responsible for depression of the shoulder and protraction of the scapula.
Muscle Innervation
- The subclavius muscle is innervated by the nerve C5-C6.
Muscle Origin
- The serratus anterior muscle originates from the surface of the scapula (1st to 9th ribs).
Muscle Actions
- The serratus anterior muscle is primarily associated with the action of rotation of the scapula.
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