Finite Element magnetic model of the myokinetic control interface components. The human forearm was modelled as a solid water cylinder (length 250 mm, diameter 70 mm), with four implanted cylindrical MMs (MM0…MM3). The magnetic shield was modelled as a hollow cylinder (length 250 mm, diameter 110 mm, thickness 0.1 mm). The magneto-static disturbance (not shown) was modelled as a cubic magnet (L = 5 mm, Br = 14 kG) producing a 16 G field on the sensors on PCB1 (first simulation) or on PCB2 (second simulation) (i.e. 25 mm away from either PCB1 or PCB2).