{"database":"biostudies-literature","file_versions":[],"scores":null,"additional":{"submitter":["Tao Y"],"funding":["NIDCD NIH HHS","National Institute on Deafness and Other Communication Disorders"],"pagination":["17-41"],"full_dataset_link":["https://www.ebi.ac.uk/biostudies/studies/S-EPMC9088558"],"repository":["biostudies-literature"],"omics_type":["Unknown"],"volume":["131"],"pubmed_abstract":["This study, through a series of univariate and multivariate (classification) analyses, investigated fMRI task-based functional connectivity (FC) at pre- and post-treatment time-points in 18 individuals with chronic post-stroke dysgraphia. The investigation examined the effects of lesion and treatment-based recovery on functional organization, focusing on both inter-hemispheric (homotopic) and intra-hemispheric connectivity. The work confirmed, in the chronic stage, the \"network phenotype of stroke injury\" proposed by Siegel et al. (2016) consisting of abnormally low inter-hemispheric connectivity as well as abnormally high intra-hemispheric (ipsilesional) connectivity. In terms of recovery-based changes in FC, this study found overall hyper-normalization of these abnormal inter and intra-hemispheric connectivity patterns, suggestive of over-correction. Specifically, treatment-related homotopic FC increases were observed between left and right dorsal frontal-parietal regions. With regard to intra-hemispheric connections, recovery was dominated by increased ipsilateral connectivity between frontal and parietal regions along with decreased connectivity between the frontal regions and posterior parietal-occipital-temporal areas. Both inter and intra-hemispheric changes were associated with treatment-driven improvements in spelling performance. We suggest an interpretation according to which, with treatment, as posterior orthographic processing areas become more effective, executive control from frontal-parietal networks becomes less necessary."],"journal":["Cortex; a journal devoted to the study of the nervous system and behavior"],"pubmed_title":["How functional network connectivity changes as a result of lesion and recovery: An investigation of the network phenotype of stroke."],"pmcid":["PMC9088558"],"funding_grant_id":["P50 DC012283"],"pubmed_authors":["Tao Y","Rapp B"],"additional_accession":[]},"is_claimable":false,"name":"How functional network connectivity changes as a result of lesion and recovery: An investigation of the network phenotype of stroke.","description":"This study, through a series of univariate and multivariate (classification) analyses, investigated fMRI task-based functional connectivity (FC) at pre- and post-treatment time-points in 18 individuals with chronic post-stroke dysgraphia. The investigation examined the effects of lesion and treatment-based recovery on functional organization, focusing on both inter-hemispheric (homotopic) and intra-hemispheric connectivity. The work confirmed, in the chronic stage, the \"network phenotype of stroke injury\" proposed by Siegel et al. (2016) consisting of abnormally low inter-hemispheric connectivity as well as abnormally high intra-hemispheric (ipsilesional) connectivity. In terms of recovery-based changes in FC, this study found overall hyper-normalization of these abnormal inter and intra-hemispheric connectivity patterns, suggestive of over-correction. Specifically, treatment-related homotopic FC increases were observed between left and right dorsal frontal-parietal regions. With regard to intra-hemispheric connections, recovery was dominated by increased ipsilateral connectivity between frontal and parietal regions along with decreased connectivity between the frontal regions and posterior parietal-occipital-temporal areas. Both inter and intra-hemispheric changes were associated with treatment-driven improvements in spelling performance. We suggest an interpretation according to which, with treatment, as posterior orthographic processing areas become more effective, executive control from frontal-parietal networks becomes less necessary.","dates":{"release":"2020-01-01T00:00:00Z","publication":"2020 Oct","modification":"2025-04-04T07:46:20.051Z","creation":"2025-04-04T07:46:20.051Z"},"accession":"S-EPMC9088558","cross_references":{"pubmed":["32781259"],"doi":["10.1016/j.cortex.2020.06.011"]}}