Effect of Topical Capsaicin on Laser Evoked Potentials. A. Topical pretreatment with 1% capsaicin did not affect grand average (across 7 subjects) LEP evoked by a suprathreshold short (60 ms) laser pulses. B. In contrast, topical capsaicin clearly enhanced cortical responses to the suprathreshold long (1.5 s) laser pulses.
Tzabazis et al. Molecular Pain 2011 7:18 doi:10.1186/1744-8069-7-18