P-values of the metabolite comparisons between the intracranial CST segments in each hemisphere in the control group.

Significant p-values (<0.05) are indicated by asterisks (*). Out of a total of 40 possible comparisons, 34 and 30 between-segment comparisons were found to be significant in the left and right CST, respectively. The abbreviations used are: CST: corticospinal tract, PCG: precentral gyrus, CS: centrum semiovale, CR: corona radiate, PLIC: posterior limb of internal capsule, and CP: cerebral peduncle, NAA: N-acetyl aspartate, Cho: total-choline, Cre: total-creatine.