Table 1.

Summary of NRTP 3-D movement fields

• Fit results of Eq. 6 for all 34 cNRTP burst neurons. Fis the mean firing rate (in Hz), (êxy, êz ) are the (dimensionless) components of the normalized eye displacement tuning vector, ê. ςi is the standard deviation of parameter i and was obtained by bootstrapping the fit 75 times (see Efron and Tibshirani, 1991). r is the correlation coefficient between fit and data, and N is the number of saccades, selected on the basis of an optimal amplitude criterion (see Materials and Methods). Rmin andRmax are the minimum and maximum saccade amplitudes (in deg), selected for each cell. L,R = left/right recording side.

• F1_152 , Significant torsional component, r ≥ 0.7;

• F1_150 , significant torsional component, 0.6 ≤ r ≤ 0.7. In 20/34 cells the correlation exceeded 0.7, and in 11/20 the torsional component differed significantly from zero. In 11/34 neurons correlations are higher than 0.8, out of which 5 have a torsional on-direction. For 9/34 cells 0.6 ≤ r ≤ 0.7, and in 5 torsion was unequal to zero. For 5/34 cellsr < 0.6, and in 2 of these a significant torsion was obtained. Also, from the 10 directional burst neurons, 4 were torsional. Thus, regardless of the criteria applied, in roughly half of the cells (18/34) the obtained torsional component was significant.