Preprint Brief Report Version 1 Preserved in Portico This version is not peer-reviewed

White Matter Integrity in the Right Hemisphere Correlates with the Reading Span

Version 1 : Received: 12 January 2021 / Approved: 13 January 2021 / Online: 13 January 2021 (14:49:44 CET)

How to cite: Pechenkova, E.; Panikratova, Y.; Fomina, M.; Mershina, E.; Bazhenova, D.; Makovskaya, L.; Rumshiskaya, A.; Fedorova, O.; Sinitsyn, V.; Lebedeva, I.; Vlasova, R. White Matter Integrity in the Right Hemisphere Correlates with the Reading Span. Preprints 2021, 2021010254 (doi: 10.20944/preprints202101.0254.v1). Pechenkova, E.; Panikratova, Y.; Fomina, M.; Mershina, E.; Bazhenova, D.; Makovskaya, L.; Rumshiskaya, A.; Fedorova, O.; Sinitsyn, V.; Lebedeva, I.; Vlasova, R. White Matter Integrity in the Right Hemisphere Correlates with the Reading Span. Preprints 2021, 2021010254 (doi: 10.20944/preprints202101.0254.v1).

Abstract

Although working memory (WM) is crucial for intellectual abilities, not much is known about its brain underpinnings, especially the structural connectivity. We used diffusion tensor imaging (DTI) to look across the whole brain for the white matter integrity correlates of the individual differences in the reading span (verbal WM capacity during reading) in healthy adults. Right-handed healthy native Russian speakers (N = 47) underwent DTI on a 3T Philips Ingenia scanner. Verbal WM was assessed with the Daneman-Carpenter reading span test (Russian version). Fractional anisotropy maps from each participant were entered into the group tract-based spatial statistics analysis with the reading span as a covariate; the results were TFCE-corrected. Reading span positively correlated with the white matter integrity in several sites of the right hemisphere: the body and the splenium of corpus callosum; the posterior limb of internal capsule; posterior corona radiata; and superior parietal white matter. Although the left hemisphere is central for verbal processing, we revealed the important role of the right hemisphere white matter for the verbal WM capacity. Our finding indicates that larger verbal working memory span may originate from additional processing resources of the right hemisphere.

Subject Areas

working memory; reading span; white matter; DTI

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