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Figure 1 | BMC Neuroscience

Figure 1

From: Differential effects of tactile high- and low-frequency stimulation on tactile discrimination in human subjects

Figure 1

Psychometric functions (regression curves) illustrating the differential effect of 20 min large-field t-HFS and t-LFS stimulation in two representative subjects. Correct responses in percent are plotted as a function of separation distance. 50% level of correct responses is indicated together with resulting thresholds (dashed horizontal and vertical lines). Dashed grey lines show pre-condition before, solid black lines post-condition immediately after t-HFS or t-LFS. After t-HFS there is a distinct shift in the psychometric functions towards lower separation distances (threshold was reduced from 1.83 to 1.48 mm after t-HFS). After t-LFS we found an analogous shift in the psychometric curve, but towards larger separations (threshold was increased from 1.86 to 2.05 mm after t-LFS

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