Fig. 12. A three-way comparison of pursuit strength, neuronal direction preference, and neuronal eye dominance for the two strabismic monkeys that were used for both pursuit and MT recordings. Each panel summarizes the pursuit and MT neuronal responses for visual signals in one visual hemifield (and thus one hemisphere) of one of the monkeys. Within each panel, pursuit and direction preference data are presented separately for each eye. The double-headed vectors at the top of each panel indicate the directional bias in pursuit and in the preferences of MT neurons. Theupper vector pairs (labeled Pursuit) summarize the average eye acceleration data from Figure 4, combined for target eccentricities of 3, 6, and 9 deg in the hemifield appropriate to the indicated hemisphere. The accelerations are normalized so that the ends of the T–N–T scale correspond to the largest eye acceleration value obtained in that monkey (i.e., the peak values on the corresponding plots in Fig. 4). T indicates temporalward eye acceleration, and N indicates nasalward eye acceleration. Open arrowheads indicate responses to temporalward target motion, and filled arrowheadsindicate responses to nasalward target motion. The lower vector pairs (labeled Neuronal preference) show the proportions of neurons that received effective input from the indicated eye and preferred directions with a temporalward (T,open arrowheads) or nasalward (N,filled arrowheads) component. For the contralateral eye, “effective input” was assumed for neurons in eye dominance groups 1–5; for the ipsilateral eye, we used groups 3–7. Neurons preferring directions within ±22.5 deg of vertical are excluded. The ends of theT–N–T scale correspond to 100% of the direction-selective neurons for the indicated eye and hemisphere. At least 20 neurons contribute to each vector pair, except for the left eye/left hemisphere of monkey SY (2 neurons) and the left eye/left hemisphere of monkey PW (11 neurons). The eye dominance distributions are conventional. A, B, Data from the two hemispheres of monkey SY. C, D, Data from the two hemispheres of monkey PW.