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Average contralesional reticulospinal tract (RetST) fractional anisotropy (FA) for severe stroke group (0.415), moderate stroke group (0.363), and control group (0.393). Severely impaired individuals show significantly greater FA (p = 0.0045) than moderately impaired individuals. SD bars are shown. 95% confidence intervals were severe [0.39, 0.43], moderate [0.34, 0.38], and control [0.37, 0.41].
