I have underlined some problem areas and crossed out unnecessary verbiage: No changes in the left hand's MMs grade could be attributed to a possible maturation of corpus callosum's myelination over 1 year period. Precisely , it can be speculated that unlike the 1st session, where transcallosal connection might have affected both sides, brain maturation could have resulted in a deterioration of linkage between both hemispheres in the 2nd session, which would result in an improvement only in the right hand.
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