Somatosensory evoked potentials in abetalipoproteinemia.

Visual, brain-stem auditory, and somatosensory evoked potentials (SEPs) were obtained on a patient with known abetalipoproteinemia. Only the SEP was abnormal, and it correlated with the reported neuropathology of this disease. Serial SEP studies remained stable, as had the clinical condition of this patient on vitamin E therapy. The SEP may supplement clinical examination in follow-up of patients under treatment.