化学物質を用いたサーマルグリル錯覚における刺激配置の検討（第二報）

グリッド状配置の場合の検討

抄録

The Thermal Grill Illusion (TGI) is a phenomenon that causes a burning sensation or pain when warm and cold stimuli alternate. The chemical-based TGI method can provide a prolonged painful experience with low energy. However, it has the challenge of requiring a time lag between the application of two chemicals to produce a strong TGI. To overcome this limitation, we investigated the impact of the placement of chemical stimuli on TGI perception. In our first study, we divided the stimulus area into two parts and compared simple placements like vertical and horizontal orientations. Our findings show that TGI perception is influenced by the placement of stimuli, and the strongest TGI is produced when capsaicin is applied proximally on the forearm and menthol distally. In our second study, we compared a more complex placement, a grid-like stimulus placement, to the strongest placement from the first study.