Impaired interhemispheric synchrony in late blindness.
Background: Several neuroimaging studies demonstrated that visual deprivation led to significant cross-modal plasticity in the brain's functional and anatomical architecture. Purpose: To investigate the pattern of the interhemispheric functional connectivity in individuals with late blindness using...
| Published in: | Acta Radiologica Vol. 61; no. 3; pp. 414 - 424 |
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| Main Authors: | , , , |
| Format: | Journal Article |
| Published: |
Sage Publications Inc.
Mar2020
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| Online Access: | View this record in EBSCOhost |
| fields | @attributes: recordID: 1 pdfLink: plink: https://search.ebscohost.com/login.aspx?direct=true&db=ccm&AN=142085571&site=ehost-live header: @attributes: shortDbName: ccm uiTerm: 142085571 longDbName: CINAHL Complete uiTag: AN controlInfo: bkinfo: dissinfo: jinfo: jid: 02841851 1XG jtl: Acta Radiologica issn: 02841851 maglogo: Y pubinfo: dt: Mar2020 vid: 61 iid: 3 pid: 344 pub: Sage Publications Inc. place: Thousand Oaks, California artinfo: ui: 142085571 142085571 NLM31342759 10.1177/0284185119864843 NLM31342759 142085571 ppf: 414 ppct: 10 formats: tig: atl: Impaired interhemispheric synchrony in late blindness. aug: au: Huang, Xin Zhou, Fu-Qing Dan, Han-Dong Shen, Yin affil: Eye Center, Renmin Hospital of Wuhan University, Wuhan, PR China sug: subj: Brain Pathology Magnetic Resonance Imaging Methods Blindness Pathology Brain Brain Mapping Methods Adult Male Female Clinical Assessment Tools Adult: 19-44 years Male Female ab: Background: Several neuroimaging studies demonstrated that visual deprivation led to significant cross-modal plasticity in the brain's functional and anatomical architecture. Purpose: To investigate the pattern of the interhemispheric functional connectivity in individuals with late blindness using the voxel-mirrored homotopic connectivity (VMHC) and seed-based functional connectivity (FC) methods. Material and Methods: Forty-four individuals with late blindness (22 men, 22 women; mean age = 39.88 ± 12.84 years) and 55 sighted control individuals (35 men, 20 women; mean age = 43.13 ± 13.98 years)—closely matched for age, sex, and education—underwent resting-state magnetic resonance imaging scans. The VMHC and seed-based FC methods were applied to assess interhemispheric coordination in a voxel-wise manner. Results: Compared with the sighted control groups, the late blindness groups showed decreased VMHC values in the bilateral cuneus/calcarine/lingual gyrus (CUN/CAL/LING) (BA 17/18/19) (voxel level: P < 0.001, Gaussian random field [GRF] correction, cluster level: P < 0.005). Meanwhile, for seed-based FC analysis, compared with the sighted control group, the late blindness group showed a decreased FC between the right lower VMHC regions and the bilateral CUN/LING/CAL/precuneus (PreCUN)/left middle occipital gyrus (MOG) (BA 18/19/30/31) and left precentral gyrus (PreCG) and postcentral gyrus (PostCG) (BA 2/3/4/6). The late blindness group showed a decreased FC between the left lower VMHC regions and the bilateral CUN/LING/CAL/PreCUN (BA 18/19/31) and left PreCG and PostCG (BA 2/3/4/6) relative to the sighted control group (voxel level: P < 0.001, GRF correction, cluster level: P < 0.005). Moreover, a negative correlation was observed between the duration of blindness and VMHC values in the bilateral CUN/CAL/LING (r = −0.393, P = 0.008) in individuals with late blindness. Conclusion: Our results indicated that late blindness induced substantial impairment of interhemispheric coordination in the visual cortex. This might reflect impaired visual fusion, visual recognition function, and top-down modulations in individuals with late blindness. pubtype: Academic Journal doctype: Journal Article ougenre: Article language: English refInfo: holdings: @attributes: islocal: N |
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