Term
| 1. How is the scapula attached to the trunk? |
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Definition
| Muscles mostly and to the skeleton by the acromioclavicular joint. |
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Term
| 2. What extrinsic muscle(s) of the scapula elevates the scapula? |
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Definition
| Levator scapulae, rhomboids, upper fibers of trapezius. |
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Term
| 3. What are the four rotator cuff muscles? |
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Definition
| Subscapularis, supraspinatus, infraspinatus, teres minor. |
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Term
| 4. Which of the rotator cuff muscles medial rotates the shoulder joint? |
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Definition
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Term
| 5. In addition to movement of the shoulder joint, what is a key function of the rotator cuff muscles? |
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Definition
| Stabilizes the shoulder joint – hold humeral head against glenoid. |
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Term
| 6. What nerve innervates the infraspinatus muscle? |
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Definition
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Term
| 7. If the nerve in #6 is damaged, what movement(s) of the shoulder would be affected? |
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Definition
| Lateral rotation and initiation of abduction. |
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Term
| 8. In abducting the arm, what muscle raises the arm to the horizontal position? What nerve is involved? |
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Definition
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Term
| 9. How is the arm raised above the horizontal position? |
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Definition
| Scapula is rotated by the serratus anterior and lower fibers of trapezius so that the glenoid points upward. |
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Term
| 10. Rotator cuff injuries most commonly involve which rotator cuff muscle or tendon? |
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Definition
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Term
| 11. Which are the boundaries of the quadrangular space? |
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Definition
| Shoulder capsule (or teres minor), long head of triceps, surgical neck of the humerus, upper border of teres major. |
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Term
| 12. What vessel is found in the triangular interval? |
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Definition
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Term
| 13. At what joint does separation of the shoulder occur? What ligaments are often torn? |
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Definition
| acromioclavicular; acromioclavicular ligament and the coracoclavicular ligaments (trapezoid & conoid) |
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Term
| 14. How is the clavicle often broken? |
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Definition
| By falling on the outstretched upper limb and hand (to break the fall) the clavicle breaks between the lateral and middle thirds. The distal end and upper limb drops. (FOOSH!!) |
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Term
| 13. At what joint does separation of the shoulder occur? What ligaments are often torn? |
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Definition
| acromioclavicular; acromioclavicular ligament and the coracoclavicular ligaments (trapezoid & conoid) |
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