A 33-year-old woman has burned her hands in the kitchen on several occasions over the past 6 months. Examination shows mild atrophy of the arms and hands, and decreased pain and temperature sensation in the C5 to T1 dermatomes. Touch is preserved. Which of the following is the most likely explanation for these findings?
Anterior horn destruction
Fasciculus cuneatus obliteration
Fasciculus gracilis obliteration
Lesion at anterior white commissure
Myoneural junction disorder
