Table 1.
aMuscle weakness in lower limbs: + = ankle dorsiflexion 4/5 on medical research council (MRC) scale; ++ = ankle dorsiflexion < 4/5 on MRC scale
Muscle weakness in upper limbs: + = intrinsic hand weakness 4/5 on MRC scale; ++ = intrinsic hand weakness < 4/5 on MRC scale; - = no symptoms; bFDS = functional disability scale, cA= asymptomatic.