Figure 3

Spatial selectivity of t-HFS-induced effects. Percent changes in discrimination thresholds (n = 17) of all fingers of the right hand (d1–d5), while tactile HFS was applied to the right index finger (d2) for a period of 20 min. Apart from a significant lowering in discrimination thresholds on d2 after t-HFS, only little fluctuations could be observed for all other fingers. These findings demonstrate a lack of effects on others than the stimulated finger, which indicates a substantial local specificity of tactile HFS-induced changes.