[Saccadic latency in human with different profiles of functional asymmetry depending on visual space complicity]

The latencies of visually-guided saccades of 47 right-handed subjects (32 with right leading and 15 with left leading eyes) were studied. Stimulation paradigm was spatially bidimentional, and stimuli were presented along horizontal, vertical and oblique axes. Three levels of visual space complicity and two traditional single-step GAP and OVERLAP temporal paradigms were used. A half of the left-leading-eye subjects had shorter latencies of the saccades directed towards the left (ipsilateral) hemifield, whereas only one fifth of the subjects demonstrated shorter latencies ofsaccades towards the right (contralateral) hemifield (53% vs 20%). Only one fourth of right-leading-eye subjects had shorter latencies of saccades towards the inpsilateral hemifield and one fifth of these subjects had shorter latencies of the saccades towards the contralateral hemifield (20% vs 25%). The interrelation between eye dominance and spatial asymmetry of saccadic latencies is revealed.