Posted by lae2 on October 31, 2017 at 15:10:26:
Axilla and Brachial Plexus - True/False
1. Two muscles take origin from the coracoid process and one muscle inserts at the coracoid process.
2. Pectoralis minor depresses the scapula and adducts at the glenohumeral joint.
3. At the anterior boundary of the axilla the lateral pectoral nerve is medial to the medial pectoral nerve.
4. The latissimus dorsi inserts on the intertubercular sulcus; medial to pectoralis major and lateral to pectoralis minor.
5. The long thoracic nerve is a branch of the posterior cord of the brachial plexus and innervates the serratus anterior.
6. The cords of the brachial plexus are named according to their relationships to the coracoid process.
7. Severance of the posterior cord that affects all branches eliminates lateral rotation at the glenohumeral joint.
8. Severance of the posterior cord results in a flexed and adducted resting position of the wrist.
9. Severance of the lateral cord of the brachial plexus entirely eliminates flexion at the elbow.
10. Severance of the lateral and medial cords of the brachial plexus results in an extended and abducted resting position of the wrist.
11. Severance of the radial nerve at the spiral grove results in a flexed wrist and loss of extension at the elbow.
12. The anterior and posterior humeral circumflex arteries circle the anatomical neck of the humerus.
13. Distal to the circumflex scapular artery the subscapular artery continues as the thoracodorsal artery.
14. The profunda brachii artery passes through the triangular space to arrive at the infraspinous fossa.
15. The musculocutaneous nerve passes through the short head of the biceps as it enters the posterior arm.
16. The C5 root of the brachial plexus elaborates the dorsal scapular nerve and contributes to the phrenic and long thoracic nerves.
17. The superior trunk of the brachial plexus elaborates the suprascapular nerve.
18. Erb's palsy primarily affects the shoulder and Klumke's palsy primarily affects intrinsic muscles of the hand.
19. Severance of the ulnar at the axilla results in the ulnar paradox.
20. Severance of the median nerve in the axilla affects flexion at the elbow.
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