Questions and Answers
List all the shoulder adductors.
Pectoralis Major, Latissimus Dorsi, Teres Major, Coracobrachialis
The origin of Pectoralis Major is the ____ end of the clavicle, sternum, and ribs 1-6.
sternal
What is the insertion point of Pectoralis Major?
By short tendon into intertubercular sulcus of humerus and greater tubercle of humerus.
The origin of Latissimus Dorsi includes the lower 6 Tx, Lx, lower 3-4 ribs, ___________ crest, and inferior angle of scapula.
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What is the insertion point of Latissimus Dorsi?
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The origin of Teres Major is the posterior surface of scapula at the __________ angle.
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What is the insertion point of Teres Major?
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The origin of Coracobrachialis is the ___________ process.
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What is the insertion point of Coracobrachialis?
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Study Notes
Shoulder Adductors
- Major muscles involved in shoulder adduction include Pectoralis Major, Latissimus Dorsi, Teres Major, and Coracobrachialis.
- Pectoralis Major is crucial for various upper body movements and assists in both flexing and rotating the arm.
Pectoralis Major
- Originates from the sternal end of the clavicle, sternum, and the first six ribs.
- Inserts into the intertubercular sulcus and greater tubercle of the humerus via a short tendon.
Latissimus Dorsi
- Originates from the lower six thoracic vertebrae, lumbar vertebrae, lower three to four ribs, iliac crest, and inferior angle of the scapula.
- Inserts into the intertubercular sulcus of the humerus, making it vital for shoulder extension and adduction.
Teres Major
- Originates from the posterior surface of the scapula at the inferior angle.
- Inserts at the lesser tubercle of the humerus, and its tendon fuses with that of the Latissimus Dorsi, aiding in arm movement.
Coracobrachialis
- Originates from the coracoid process of the scapula.
- Inserts on the medial surface of the humerus, contributing to shoulder flexion and adduction.
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Description
This quiz provides flashcard-style questions on shoulder adductors, including key muscles involved and their origins and insertions. Perfect for students of anatomy or those preparing for related examinations to test their understanding of shoulder muscle anatomy.
