This study provides evidence for a prominent involvement of pyramidal dysfunction in upper limb dexterity loss as well as a potential outcome measure for clinical studies in FRDA.
FRDA patients had slower and more regular FT rate than controls. Eleven FRDA patients showed FT rate slowing. Those patients had longer disease duration and higher SARA scores. Seven patients with FT rate slowing had MEP and all displayed prolonged CMCT, while the four other patients with constant FT rate had normal CMCT.