ecoding model was used (Fig. 2) (Georgopoulos et al.. 2005): N L xitl — x(t - 11=E t bffir calt — lc] (2) n.1 k =0 Yltl - y[t —11 = E E bniy.S„Ir — kj n-1 t=0 (3) where x(rj and All are the horizontal and vertical position of the pen at time sample r respectively. N is the number of MEG sen