Fig. 3.
Comparison of eye-related parameters during spontaneous eye movements between SIF and MIF motoneurons. (A) Linear regression lines of firing rate versus eye position for 104 SIF (blue) and 51 MIF (red) motoneurons. The slope of each line represents the neuronal eye position sensitivity (ks) during spontaneous eye movements. (B) Linear regression lines of firing rate versus eye velocity for the same set of cells as shown in A. The slope of each line represents the neuronal eye velocity sensitivity (rs) during spontaneous eye movements. (C–F) Bar charts comparing eye position sensitivity (ks, in C), firing rate at straight-ahead gaze (F0, in D), eye position threshold (Th, in E) and eye velocity sensitivity (rs, in F) between the 51 MIF and 104 SIF motoneurons illustrated in A and B. Data are mean and SEM. Asterisks indicate significant differences (P < 0.05, t test).