Term
| List the origin(s) of the Trapezius |
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Definition
| Medial third of the superior nuchal line, external occipital protuberance, spinous processes of C7-T12 vertebrae |
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Term
| List the insertion(s) of the Trapezius |
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Definition
| Lateral third of of clavicle, acromion and spine of scapula |
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Term
| What innervates the Trapezius? |
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Definition
| Cranial nerve XI, spinal nerve C3, C4 |
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Term
| What is the action of the descending part of the trapezius? |
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Definition
| Elevates the shoulder (not the joint) |
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Term
| What is the action of the ascending part of the trapezius? |
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Definition
| depresses the shoulder (not the joint) |
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Term
| What is the action of the middle part of the trapezius? |
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Definition
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Term
| List the origin(s) of the Latissimus Dorsi |
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Definition
| Spinous processes of inferior 6 thoracic vertebrae, thoracolumbar fascia, iliac crest and inferior 3 or 4 ribs |
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Term
| List the insertion(s) of the Latissimus Dorsi |
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Definition
| Floor of interbercular groove of humerus |
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Term
| What innervates the Latissimus Dorsi? |
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Definition
| Thoracodorsal nerve (C6, C7, C8) |
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Term
| What is the main action of the Latissimus Dorsi? |
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Definition
| Extends, adducts, and medially rotates humerus |
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Term
| List the origin(s) of the Pectoralis major |
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Definition
| Clavicular head, sternocostal head, superior six costal cartilages |
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Term
| List the insertion(s) of the Pectoralis major |
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Definition
| Lateral lip of intertubercular groove of humerus |
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Term
| What innervates the Pectoralis Major? |
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Definition
| Lateral and medial pectoral nerves |
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Term
| What is the main action of the Pectoralis major? |
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Definition
| Adducts and medially rotates humerus; draws scapula anteriorly and inferiorly |
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Term
| List the origin(s) of the Pectoralis minor |
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Definition
| 3-5th ribs near their costal cartilages |
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Term
| List the insertion(s) of the Pectoralis minor |
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Definition
| Medial border and superior surface of coracoid process of scapula |
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Term
| What innervates the Pectoralis minor? |
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Definition
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Term
| What is the main action of the Pectoralis minor? |
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Definition
| Stabilizes scapula by drawing it inferiorly and anteriorly against thoracic wall |
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Term
| List the origin(s) of the Teres major |
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Definition
| Posterior surface of inferior angle of scapula |
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Term
| List the insertions(s) of the Teres major |
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Definition
| Medial lip of intubercular groove of humerus |
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Term
| What innervates the Teres major |
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Definition
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Term
| What is the main action of the Teres major? |
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Definition
| Adducts and medially rotates the arm |
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Term
| List the origin(s) of the Deltoid |
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Definition
| Lateral third of clavicle, acromion and spine of scapula |
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Term
| List the insertion(s) of the Deltoid |
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Definition
| Deltoid tuberosity of humerus |
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Term
| What innervates the Deltoid |
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Definition
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Term
| What is the main action of the anterior part of the deltoid? |
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Definition
| flexes and medially rotates arm |
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Term
| What is the main action of the middle part of the deltoid? |
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Definition
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Term
| What is the main action of the posterior part of the deltoid? |
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Definition
| extends and laterally rotates arm |
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