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Questions and Answers
Which muscle attaches the scapula with the humerus?
Which muscle attaches the scapula with the humerus?
- Pectoralis major
- Subscapularis
- Deltoid (correct)
- Trapezius
Which part of the scapula does the deltoid muscle originate from?
Which part of the scapula does the deltoid muscle originate from?
- Acromion
- Clavicle
- Spine of scapula (correct)
- Deltoid tuberosity in humerus
What is the action of the anterior fibers of the deltoid muscle?
What is the action of the anterior fibers of the deltoid muscle?
- Adduction
- Flexion
- Medial rotation
- Abduction (correct)
What is the action of the subscapularis muscle?
What is the action of the subscapularis muscle?
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What is the nerve supply to the deltoid muscle?
What is the nerve supply to the deltoid muscle?
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Study Notes
Muscles of the Scapula and Humerus
- The muscle that attaches the scapula with the humerus is the deltoid muscle.
Deltoid Muscle
- The deltoid muscle originates from the anterior surface of the acromion process and the lateral border of the scapula spine.
- The anterior fibers of the deltoid muscle are responsible for flexion and medial rotation of the humerus.
- The deltoid muscle receives its nerve supply from the axillary nerve (C5-C6).
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