We evaluated multimodal evoked potentials in patients with primary Sjogren's syndrome without clinical neurological manifestations. While brainstem auditory evoked potentials (BAEP) were performed in ninety patients visual (VEP) and somatosensory evoked potentials (SEP) could be evaluated in fifty-eight patients. The control group included 20 healthy adults matched for sex and chronological age. VEP and AEP studies did not reveal any abnormality. In SEP; N9-N13 interpeak latencies were significantly prolonged in the patients group. However, the latency of N9 potentials recorded from Erb's point was normal as well as the N13-N20 interpeak latencies. This result indicates that central branches of the primary sensory neurons are involved in Sjogren's syndrome.