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- W4297962017 abstract "Abstract Hemispheric dominance has been used to understand the influence of central and peripheral neural damage on the motor function of individuals with stroke, cerebral palsy, and limb loss. It has been well established that greater activation occurs in the contralateral hemisphere to the side of the body used to perform the task. However, there is currently a large variability in calculation procedures for brain laterality when using functional near-infrared spectroscopy (fNIRS) as a non-invasive neuroimaging tool. In this study, we used fNIRS to measure brain activity over the left and right sensorimotor cortices while participants (n = 20, healthy and uninjured) performed left and right-hand movement tasks. Then, we analyzed the fNIRS data using two different processing pipelines (block averaging or general linear model [GLM]), two different criteria of processing for negative values (include all beta values or include only positive beta values), and three different laterality index (LI) formulas. The LI values produced using the block averaging analysis indicated an expected contralateral dominance with some instances of bilateral dominance, which agreed with the expected contralateral activation. However, the inclusion criteria nor the LI formulas altered the outcome. The LI values produced using the GLM analysis displayed a robust left hemisphere dominance regardless of the hand performing the task, which disagreed with the expected contralateral activation. In conclusion, we recommend using the block averaging analysis when calculating brain laterality as measured by fNIRS." @default.
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- W4297962017 date "2022-09-29" @default.
- W4297962017 modified "2023-10-18" @default.
- W4297962017 title "Laterality Index Calculations in a Control Study of Functional Near Infrared Spectroscopy" @default.
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- W4297962017 doi "https://doi.org/10.21203/rs.3.rs-2093217/v1" @default.
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