Differential modulation of prepulse inhibition of the blink reflex in peripersonal versus extrapersonal space

Reduction in R2 magnitude after prepulse stimulation 100 ms prior to test pulse is recognized (PPI). Although PPI was observed under both conditions, PPI of so-BR was attenuated when the stimulus was presented in the PPS. Therefore, our study provides evidence for modulation of PPI of so-BR in PPS and may suggest top-down modulation of the neural circuitry underlying PPI.