Figure 7. Oriented postural responses induced by transcutaneous electrical stimulation of the forefoot and/or heel zones of the soles.
The plantar regions were stimulated by pairs of surface electrodes (•): delivery of rectangular pulses (0.5 ms duration, 100 Hz) at non-painful intensity (1.2 × perception threshold). Individual final positions of the CoP after 2.5 s of stimulation for 5 subjects are shown (○); their means are represented (□). Vectors show that body tilts are contralaterally oriented with respect to the stimulation sites.