(192) The Perceptibility Difference between Glans Penis and Penile Shaft in Primary Premature Ejaculation

Abstract Introduction The penis is a vital perceptor that transmits perceived signals to ejaculation-related centers. The penis consists of the glans and the shaft, and histology and innervation differ considerably. Does this difference affect their perceptibility? Objective This paper aims to investigate whether perceived signals are different using the glans penis or penile shaft as the perceptor zone and whether hypersensitivity of the penis is the whole or the part. Methods Through somatosensory evoked potentials, thresholds, latencies, and amplitudes were recorded in 290 cases of primary premature ejaculation, using the penis and penile shaft as the perceptor areas, respectively. Results (1) Thresholds, latency, and amplitude of the glans penis and penile shaft in patients were significant differences (P< 0.05) (2) The latency of the glans penis or penile shaft was shorter than average (hypersensitivity) in 141 cases (48.62%), of which 50 cases (35.5%) were sensitive to both the glans and shaft of the penis, 14 cases (9.93%) were sensitive to the glans only and 77 cases (54.6%) were sensitive to the shaft only. (P <0.05) Conclusions There are differences in the signals perceived with the glans penis and the penile shaft as the perceptive zone. Penile hypersensitivity does not necessarily mean that the whole penis is hypersensitive. We classify the penile hypersensitivity into three categories: the glans, the shaft, or the whole penile hypersensitivity, and we put forward the new penis high sensitivity zone concept. Disclosure No