Fig. 3
From: Supporting front crawl swimming in paraplegics using electrical stimulation: a feasibility study
Electrodes used in water: a Axelgaard Ultrastim®snap electrode with oversize waterproof backing with an electrode area of 22.9 cm2 [30, 31] for tSCS (4 electrodes electrically connected for the abdomen and one over the spine) and FES (two electrodes for each quadriceps), b to d Safety silicone electrodes (VITAtronic Limited, Germany) consisting of an insulative and waterproof cover material and a conductive bottom material for tSCS (2 x (b) electrically connected for the abdomen and 1 x (d) for the back) and for FES (2 x (c) for each quadriceps)