Self- Quiz - Brachial Plexus ______1. The correct progression of the parts of the brachial plexus is: a) trunks, roots, divisions, branches, cords. b) roots, trunks, cords, divisions, branches. c) roots, trunks, divisions, cords, branches. d) roots, trunks, branches, cords, divisions. ______2. The continuation of the medial cord is the ________ nerve. a) musculocutaneous b) radial c) axillary d) ulnar ______3. The median nerve is formed from the ________ and ________ cords. a) anterior, posterior b) medial, lateral c) medial, posterior d) lateral, posterior ______4. The ________ of the brachial plexus are named for their positions relative to the axillary artery. a) cords b) trunks c) divisions d) roots ______5. The roots of the brachial plexus are formed by the a) ventral rami of spinal nerves C3 – C7 b) dorsal rami of spinal nerves C5 – C8, T1 c) ventral rami of spinal nerves C5 – C8, T1 d) dorsal rami of spinal nerves C3 – C7 ______6. The posterior cord gives rise to the ________ and ________ nerves. a) radial, ulnar b) musculocutaneous, median c) ulnar, median d) axillary, radial ______7. The ________ of the brachial plexus are found in the axilla. a) roots and trunks b) trunks and branches c) divisions and cords d) cords and branches ______8. The most medial branch of the brachial plexus is the ________ nerve. a) radial b) ulnar c) median d) axillary ______9. Finding the “M” of the brachial plexus allows you to locate the ______, ______, and ______ nerves. a) radial, ulnar, musculocutaneous b) ulnar, median, radial c) median, ulnar, musculocutaneous d) ulnar, radial, median ______10. The trunks of the brachial plexus divide into a total of ________ divisions. a) 5 b) 3 c) 8 d) 6 ______11. Which of the following is NOT a cord of the brachial plexus? a) anterior b) posterior c) medial d) lateral ______12. Which of the following is NOT a trunk of the brachial plexus? a) superior or upper b) anterior or ventral c) inferior or lower d) middle ______13. Fibers from C5 and C6 would be found in the ________ trunk. a) superior or upper b) middle c) anterior or ventral d) inferior or lower ______14. The root that does not combine with other roots to form the next portion of the brachial plexus is: a) C5 b) C6 c) C7 d) C8 ______15. The brachial plexus innervates the ________. a) neck and forearm b) upper limb c) head and neck d) neck and arm ______16. There are ____ cords, ____ roots, and ____ trunks in the brachial plexus. a) 5, 3, 6 b) 3, 5, 3 c) 6, 3, 5 d) 3, 5, 6 17. Which terminal branch of the brachial plexus innervates the deltoid and teres minor muscles? 18. Which terminal branch of the brachial plexus innervates the muscle that causes supination? 19. Injury to which branch of the brachial plexus would cause “ape hand”? 20. Injury to which branch of the brachial plexus would cause “claw hand”?