NEUROLOGIC: His reflexes were 2+ in the upper extremities, 3+ at the knees and 1+ at the ankles. He withdrew to plantar stimulation on the left, but did not have a Babinski response clearly present. He had intact finger-to-nose testing. Marked impairment in heel-to-shin testing. He was able to sit unassisted. He stood with assistance, but had a markedly ataxic gait. On sensory exam, he had a slight distal gradient to pin and vibratory sense in both lower extremities, but also had a decrease in sensation to pin over the right lower extremity compared to the left.