Referral of Wetness Sensation among Fingers

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  • Wet Referral：湿り感の指間参照現象の検討

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<p>To clarify the spatial characteristics of wetness perception, we conducted two experiments to determine whether wet stimuli on the index and ring fingers affect the feeling of wetness in the middle finger of one hand. In Experiment 1, we tested whether the perception of dryness on the middle finger is affected by wet or dry stimuli on the outer two fingers. In Experiment 2, we evaluated the uniformity of the wetness perceived from three fingers when the middle and the outer two fingers were presented with stimuli with different degrees of wetness. Results showed that when the index and ring fingers contacted the wet stimuli, and the middle finger contacted the dry stimulus, the dry sensation of the middle finger was weakened. A uniform sensation of wetness was perceived. In contrast, when the outer two fingers contacted the dry stimuli and the middle finger contacted the wet stimulus, the wet sensation on the middle finger was not affected. These results suggest the phenomenon of “wet referral” exists among the fingers in one hand.</p>

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