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Resting-state functional connectivity after concussion is associated with clinical recovery. Hum Brain Mapp 2019 03;40(4):1211-1220

Date

11/20/2018

Pubmed ID

30451340

Pubmed Central ID

PMC6365215

DOI

10.1002/hbm.24440

Scopus ID

2-s2.0-85056732323   3 Citations

Abstract

There has been a recent call for longitudinal imaging studies to better characterize the time course of physiological recovery following sport-related concussion (SRC) and its relationship with clinical recovery. To address this, we evaluated changes to resting-state functional connectivity (rs-FC) of the whole-brain network following SRC and explored associations between rs-FC and measures of clinical outcome. High school and collegiate football athletes were enrolled during preseason. Athletes that suffered SRC (N = 62) were assessed across the acute (within 48 hr) and sub-acute (days 8, 15, and 45) phases. Matched football athletes without concussion served as controls (N = 60) and participated in similar visits. Multi-band resting-state fMRI was used to assess whole-brain rs-FC at each visit using network-based statistic and average nodal strength from regions of interest defined using a common whole-brain parcellation. Concussed athletes had elevated symptoms, psychological distress, and oculomotor, balance, and memory deficits at 48 hr postconcussion relative to controls, with diminished yet significant elevations in symptoms and psychological distress at 8 days. Both rs-FC analyses showed that concussed athletes had a global increase in connectivity at 8 days postconcussion relative to controls, with no differences at the 48-hr, 15-day, or 45-day visits. Further analysis revealed the group effect at the 8-day visit was driven by the large minority of concussed athletes still symptomatic at their visit; asymptomatic concussed athletes did not differ from controls. Findings from this large-scale, prospective study suggest whole-brain rs-FC alterations following SRC are delayed in onset but associated with the presence of self-reported symptoms.

Author List

Kaushal M, España LY, Nencka AS, Wang Y, Nelson LD, McCrea MA, Meier TB

Authors

Michael McCrea PhD Professor in the Neurosurgery department at Medical College of Wisconsin
Timothy B. Meier PhD Associate Professor in the Neurosurgery department at Medical College of Wisconsin
Lindsay D. Nelson PhD Associate Professor in the Neurosurgery department at Medical College of Wisconsin
Andrew S. Nencka PhD Center Associate Director, Associate Professor in the Radiology department at Medical College of Wisconsin




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