Cervical and cortical somatosensory evoked potentials (SEPs) were recorded in 45 normal subjects. Absolute peak latencies and latency differences between the components P7, N9, N11, N13, PI7 and N20 were measured. Subjects aged 40–60 years had significantly longer latencies of Nl 3 and N20 than subjects aged 15–39 years. Moreover, statistical analysis revealed a significant prolongation of N9-N13, N11-N13 and N13-N20 transit times in older subjects. Possible connections with known morphological age-related findings are discus