Sex differences in mental rotation: Cortical functional connectivity using direct transfer function

This study investigated possible reasons for sex differences in visuospatial performance by flux of information underlying cortical functional connectivity. In the present study, earlier two stages were identified as a) perceptual encoding, identification, and discrimination of objects, kept under visuospatial attention allocation network (VSAN) and b) rotation ability involving spatial transformation strategy, assigned in mental rotation network (MRN). Participants underwent 3D mental rotation task with varying difficulty levels, simultaneously having electroencephalogram (EEG). It has been confirmed in behavioural outcome, as angular disparity increases, reaction and accuracy trades off. There were different activated electrodes in male and female participants for both networks. Advantage of spatial working memory was evident in men and reflected during performance. Also, VSAN showed that men utilised bottom-up attentional processes for more rotated views. MRN exhibited hemispheric lateralisation in the parietal cortex; men showed higher activation in right parietal cortex. This research work offers promising perspective to the study of cortical functional connectivity, in the terms of strength and direction, during sub-processes of MR.
Source: Biomedical Signal Processing and Control - Category: Biomedical Science Source Type: research