Article

Few studies are available in the literature on the sensations artificially
created by dual-channel electrocutaneous stimulation. This study assessed the
effect of a set of selected stimulation parameters on the sensations evoked by
single- or dual-channel electrocutaneous stimulation.
The investigated parameters
included the stimulation site, the number of pulses, the number of stimulating
channels (single- vs dual-channel), and the interleaved time between two
channels. The modality, quality, location, and magnitude of the sensations were
evaluated when the stimulations were applied on the forearm skin in 16
nondisabled subjects. Tactile perception was found to be induced more easily on
the median and ulnar aspect than the dorsal and radial aspect of the forearm.
Stimulation site significantly affected the magnitude of the sensation (p <
0.01). Dual-channel stimulation significantly increased the sensation magnitude
(p < 0.05) only when the two electrodes were positioned closely. Moreover, a
higher number of pulses evoked a movement perception more frequently and the
interleaved time showed no significant effect on the magnitude of the sensation.

Langue : ANGLAIS