description as best seen in the perspective view of the footswitch 10 shown in fig1 the present invention generally includes a base portion 12 a substantially planar foot pedal or tiltable treadle 14 and side or wing switches 18 commercially available footswitches are made from a variety of materials including stainless steel titanium and plastic as best shown in fig2 the motion control assembly 20 contained in the base portion 12 provides the ergonomic design which reduces the foot and leg fatigue of an operator specifically the foot pedal or tiltable treadle 14 is substantially planar the top side 15 of the foot pedal or tiltable treadle 14 is flat and is sized to engage the bottom of an operator 39 s foot not shown the bottom side 13 of the foot pedal or tiltable treadle 14 includes an arcuate projection 22 in the illustrated embodiment the perimeter 24 of arcuate projection 22 matches the contour 26 of an arcuate depression or arcuate slot 28 formed in the top of the base 12 the contour 26 of the arcuate depression 28 has a curvature with a radius r extending from an origin that is co linear with the operator 39 s ankle 100 the perimeter of the arcuate projection 22 needs not match the contour of the arcuate depression 28 friction forces between the perimeter 24 of the arcuate projection 22 and the contour 26 of the arcuate depression 28 may be reduced by the use of anti friction roller bearings 30 which ride on the contour 26 of the arcuate depression 28 in the space between the arcuate projection 22 and the contour 26 of the arcuate depression 28 those of ordinary skill in the art will understand that other anti.