Abstract
Growing evidence suggests that younger athletes with greater concussion history are more likely to endorse greater subjective cognitive (e.g., executive function) symptoms, but not perform worse on objective cognitive testing. We sought to identify biological correlates of elevated cognitive symptoms in 100 healthy, collegiate-aged athletes with varying degrees of concussion history. Associations between concussion history with subjectively-rated executive function were assessed with generalized linear models. Using resting state fMRI, we examined associations between concussion history and between-and within-network connectivity across three networks integral to executive function; default mode network (DMN), frontoparietal network (FPN), and ventral attention network (VAN). Relationships of between-and within-network connectivity with subjective executive function were assessed. Although the large majority of participants did not report clinically relevant levels of executive difficulties, there was a significant association between concussion history and higher behavioral regulation-related symptoms; B = .04[.01, .07], p = .011. A significant elevation in total within-network connectivity was observed among those with a greater concussion history, B = .02[.002, .03], p = .028, which was primarily driven by a positive association between concussion history and within DMN connectivity, B = .02[.004, .04], p = .014. Higher behavioral regulation-related symptoms were associated with greater total within-network connectivity, B = 0.57[0.18, 0.96], p = .005, and increased within-network connectivity for the DMN, B = .49[.12, .86], p = .010). The current study identified a distinct biological correlate, increased within-DMN connectivity, which was associated with both a greater history of concussion and greater behavioral regulation symptoms. Future studies are required to determine the degree to which these changes associated with concussion history may evolve toward objective cognitive decline over the lifespan.
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The data utilized as part of this study that support the reported findings are available from the corresponding author, upon reasonable request.
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Acknowledgements
The authors thank Luisa Bohorquez-Montoya, Jennifer Powell, Alexander Kirk, Amy Nader, and Dan Huber at the Medical College of Wisconsin for data collection, quality assurance, and data management; and Andrew S. Nencka, Brad Swearingen, and the MRI technicians at the Center for Imaging Research at the Medical College of Wisconsin for assistance in MRI data collection.
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Research reported in this publication was supported by the National Institute Of Neurological Disorders And Stroke of the National Institutes of Health under Award Number R01NS102225. The content is solely the responsibility of the authors and does not necessarily represent the official views of the National Institutes of Health. The REDCap electronic database and the Adult Translational Research Unit used for this project were supported by the National Center for Advancing Translational Sciences, National Institutes of Health, Award Number UL1TR001436. BLB acknowledges support from the National Institute of Neurological Disorders and Stroke (Award Number L30NS113158) and National Institute on Aging (Award Number K23 AG073528).This research was completed in part with computational resources and technical support provided by the Research Computing Center at the Medical College of Wisconsin.
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B.L. Brett, PhD- Designed and conceptualized study; major role in acquisition of the data; analyzed data; drafted and revised the manuscript for intellectual content.
A.M. Bryant, PhD- drafted and revised the manuscript for intellectual content.
L.Y. España, BA- Major role in acquisition of the data; analyzed data; revised the manuscript for intellectual content.
A.R. Mayer, PhD- Designed and conceptualized study; revised the manuscript for intellectual content.
T.B. Meier, PhD- Designed and conceptualized study; major role in acquisition of the data; analyzed data; drafted and revised the manuscript for intellectual content.
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Brett, B.L., Bryant, A.M., España, L.Y. et al. Investigating the overlapping associations of prior concussion, default mode connectivity, and executive function-based symptoms. Brain Imaging and Behavior 16, 1275–1283 (2022). https://doi.org/10.1007/s11682-021-00617-2
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DOI: https://doi.org/10.1007/s11682-021-00617-2