High frequency somatosensory stimulation increases sensori-motor inhibition and leads to perceptual improvement in healthy subjects

Godde and coworkers (Godde et al., 2000) were the first to demonstrate in healthy volunteers that high frequency repetitive somatosensory stimulation (HF-RSS) improves two point discrimination in the stimulated area. Since previous animal experiments (Godde et al., 1996) showed that HF-RSS enlarges cutaneous receptive fields in rat somatosensory cortex, it might have been expected that HF-RSS in humans would reduce spatial discrimination. However, the latter does not strictly relate to the size of individual neuron receptive field, but instead reflects the information present in the discharge of a large number of neurons (Godde et al., 1996; Godde et al., 2000; Dinse et al., 2006).

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