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- W2617377600 abstract "PURPOSE: Functional near-infrared spectroscopy (fNIRS), a noninvasive and portable neuroimaging modality that detects changes in blood oxygenation related to human brain function, is a promising tool to address the current lack of objective biomarkers to identify pathophysiologic changes associated with concussion. We sought to determine the utility of fNIRS to detect and differentiate cortical brain activity between concussed and healthy subjects when they performed the King-Devick test. METHODS: We conducted a prospective case-control study of 19 concussed subjects and 9 healthy controls who completed the King-Devick test while wearing an fNIRS headband that recorded anterior prefrontal cortex oxygenation changes with 12 channels/4 optodes at 4Hz sampling rate. Linear mixed model analysis was performed to compare oxygenation changes in the two cohorts. RESULTS: There were significant differences across increasing difficulty of the King-Devick test conditions when comparing concussed subjects with healthy controls in both the left prefrontal cortex (F1,26 = 9.906, p< 0.005) and right prefrontal cortex (F1,25 = 7.965, p< 0.01). Among this pilot cohort, healthy controls showed significantly higher levels of oxygenation changes upon initiation of the King-Devick test compared to concussed subjects, but had decreased oxygenation changes over each successive test card. This pattern was not mirrored in concussed subjects who maintained consistent levels of oxygenation changes in the left prefrontal cortex and increasing levels in the right prefrontal cortex over the course of the test. CONCLUSION: Our preliminary experimental results suggest that fNIRS detects changes in cerebral blood oxygenation between concussed and healthy subjects. Further investigation into the utility of this neuroimaging modality for quantifying changes in cognitive workload after injury and over the course of recovery is warranted.Figure 1: Comparison of oxygenation changes in the right prefrontal cortex between concussed subjects and healthy controls during trials of the King-Devick test (F1.25 = 7.965, p < 0.01)." @default.
- W2617377600 created "2017-06-05" @default.
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- W2617377600 date "2017-05-01" @default.
- W2617377600 modified "2023-10-16" @default.
- W2617377600 title "The Use Of Functional Near-Infrared Spectroscopy (fNIRS) For Assessing Cognitive Workload During King-Devick Test After Concussion" @default.
- W2617377600 doi "https://doi.org/10.1249/01.mss.0000518006.78218.6b" @default.
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