Figure 2: Comparison of the latencies of the SEPs and PSSR before and after ejaculation. The latencies of the (a) GPSEP, (b) DNSEP, and (c) PSSR, before and after ejaculation in PE patients and control subjects. PE: premature ejaculation; SEP: somatosensory evoked potential; PSSR: penile sympathetic skin response; GPSEP: glans penis somatosensory evoked potential; DNSEP: dorsal nerve somatosensory evoked potential. Student's t-test was used to compare the results between two groups. Paired t-tests were used to compare the results before and after ejaculation.