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SESSION 14 - Brachial Plexus And Upper Limb Nerves 1. Where do the following parts of the brachial plexus lie: Roots, trunks, divisions, cords? 2. Which muscles and area of skin are supplied by the musculocutaneous nerve? 3. How would you test the integrity of the axillary nerve in a patient with a dislocated shoulder? 4. Name four muscles supplied by the radial nerve before it gives off its posterior interosseous branch? What do they have it common? 5. Summarise the loss of movement that occurs with a C5,6 lesion of the brachial plexus. In what position does the arm lie? 6. Summarise the loss of movement that occurs with a C8,T1 lesion of the brachial plexus. What are the characteristics of the hand? 7. Name three nerves that arise from the roots of the brachial plexus. 8. Which muscles are supplied by the only nerve that arises from a trunk of the brachial plexus? 9. Working around and up and down the arm, can you account for the nerve supply of all the skin? 10. What is the name of the space posteriorly, in the axilla, through which the axillary nerve leaves? Can you name its boundaries? 11. Why do we call the sternoclavicular and acromioclavicular joints ATYPICAL? 12. Holding a clavicle, how would you decide which end articulates with the sternum (manubrium)? How would you decide which way up it is? 13. Which nerve is most intimately related to the scapula and where? 14. Which is the worst type of fracture of the clavicle - medial or lateral to the coracoclavicular ligament and why? 15. The two muscles whose nerve supplies are most difficult to remember are teres major and minor. Can you remember? 16. What is the letter of the alphabet that most characteristically describes the formation of the median nerve? 17. Why does the lateral "head" of the median nerve contribute more roots than the medial "head"? 18. By testing sensation in the hand only, how would you distinguish between a lesion of the median nerve at the elbow and one at the wrist? 19. What symptoms would a cervical rib produce? (note: a cervical rib is a true very small rib or fibrous band lateral the transverse process of C7) 20. What is the autonomous area for the axillary nerve?