Clinical features of CBS patients when grouped according to resting motor threshold.

Although there were no differences in patient age, symptom duration, limb weakness, or limb functional capacity, patients with a an RMT <50% were significantly more impaired on the visuospatial subtask of the ACE-R, with a trend for impaired performance on the attention and memory ACE-R sub-tasks. CBS  =  corticobasal syndrome, RMT  =  resting motor threshold, MRCSS  =  medical research council sum score, ALSFRS-R  =  amyotrophic lateral sclerosis functional rating score – revised, ACE-R =  Addenbrooke's cognitive examination – Revised, MMSE  =  mini-mental status examination. Note: P-Values quoted in the right hand column refer to inter-group comparisons. Post-hoc pairwise comparisons are indicated by: aRMT <50% versus RMT <50%, P<0.05; bRMT <50% versus Inexcitable, P = 0.063.