Asymmetry of the amplitude-temporal properties of visually-guided saccades in monkeys depending on the complexity of the spatial scheme of the visual stimulation

The properties of visually-guided saccades were studied in three monkeys (Macaca rhesus). Traditional single-step GAP-OVERLAP temporal paradigms were used. Target stimuli were presented in accordance with two spatial stimulation schemes: (i) along the horizontal meridian (one-dimensional scheme) and (ii) within rectangle part of the visual field (two-dimensional scheme). We revealed asymmetric focuses of short- and long-latency saccades in the two-dimensional scheme of stimulation. The MANOVA revealed that the factor of dimensionality influenced saccadic latency to a greater extent than the factor of lateralization of stimuli (presenting in the right or left visual hemifields). Accuracy of saccades decreased with increasing in their eccentricity in both spatial schemes of stimulation.