| Phenotype details |
see paper; ..., 30y-lost ambulation, used walking aids; delayed motor development; gait disturbance; nystagmus; broken smooth pursuit; no slow saccades; dysarthria; brisk knee jerks; no ankle clonus; normal upper limb tonus; increased lower limb tonus; lower limb weakness; Babinski signs; no fasciculations, no cramps; decreased vibration; no bladder disturbances; dysexecutive syndrome; normal behavior; MRI cerebellar atrophy; motor evoked potentials |