nerve lesion

[Miracoli]

A 52-year-old band director suffered problems in her right arm several days after strenuous field exercises
for a major athletic tournament. Examination in the orthopedic clinic reveals wrist drop and weakness
of grasp but normal extension of the elbow joint. There is no loss of sensation in the affected limb. Which
nerve was most likely affected?
A. Ulnar
B. Anterior interosseous
C. Posterior interosseous
D. Median
E. Superficial radial

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[acciddropping]

C?

 

[NeuroLAX]

C. Wrist drop and decreased grip strength tell you its some part of the radial nerve that has been damaged. That leaves you with answer choices C and E. Since there is no sensory loss, it is C.

 

[acciddropping]

A 52-year-old band director suffered problems in her right arm several days after strenuous field exercises
for a major athletic tournament. Examination in the orthopedic clinic reveals wrist drop and weakness
of grasp but normal extension of the elbow joint. There is no loss of sensation in the affected limb. Which
nerve was most likely affected?
A. Ulnar
B. Anterior interosseous
C. Posterior interosseous
D. Median
E. Superficial radial

Miracoli - can you write more neuroanatomy questions and give explanations as well? Thanks