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A 37-year-old man comes to the physician because of severe back pain for 2 days. The pain radiates down the buttock, posterior thigh, and posterolateral leg. He also has numbness on the side of his left foot. On physical examination, sensation to pain is decreased over the lateral side of the left foot. Deep tendon reflexes are absent at the left ankle, and there is weakness of dorsiflexion of the left foot. Compression of which of the following nerve roots is the most likely cause of these findings?
A ) T12
B ) L2
C ) L4
D ) S1
E ) S3
Dx-Common Peroneal injury = L4-S2
So I chose C, but answer is D= S1.... ?
A ) T12
B ) L2
C ) L4
D ) S1
E ) S3
Dx-Common Peroneal injury = L4-S2
So I chose C, but answer is D= S1.... ?