Hemispheric sex differences in response to apparently moving stimuli as indicated by visual evoked potentials

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Abstract
This research was designed to determine whether visual event potentials (ERP) recorded from over the 2 occipital hemispheres would indicate differential processing of apparently moving and stationary stimuli. Previous findings in the literature led to a consideration of a male-female comparison as part of the experimental design. Nine male and 9 female subjects were screened for right-handedness and visual abilities (acuity, depth and phoria). Each participated in 3 experimental sessions over a 3 day period in which ERP were recorded from O1 and O2 in response to stimuli presented in left, central and right visual fields. For female subjects, right hemispheric derived ERP were larger in amplitude than left hemisphere recordings for apparently moving stimuli presented centrally. Males showed no hemispheric amplitude differences. For male subjects, the left hemisphere ERP latencies to motion were longer than those recorded from over O2 with central visual field presentations. Different attentional strategies in the 2 sexes probably led to the observed result.