The radial nerve
a. Is the principal branch of the posterior cord of the brachial plexus
b. Is derived from the posterior primary rami of the C5 to T1 nerve roots
c. Is the main nerve supply to the flexor compartments of the arm and forearm
d. Supplies sensation to the extensor aspect of the radial three and a half digits
The Correct option is A
Explanation with High Yield Facts:
The radial nerve is the main branch of the posterior cord of the brachial plexus. Other branches of the posterior cord include the axillary, thoracodorsal and upper and lower subscapular nerves. All roots of the brachial plexus arise from the anterior primary rami. The radial nerve supplies the forearm and wrist extensors; A radial nerve palsy results in a classical 'wrist drop'. The anterior and posterior interosseus nerves are branches of the median and radial nerves respectively.
0 comments:
Post a Comment