Many patients with Alzheimers disease (AD) are apraxic and the apraxia has beenposited to be related to a loss of movement representations. Whereas patients with Alzheimersdisease have been reported to demonstrate normal motor learning on a rotor pursuit skillacquisition task, it is unknown whether AD subjects who are apraxic demonstrate normalskill-learning. We tested subjects with probable AD and normal controls on a rotor pursuit task.We also tested the AD subjects for ideomotor apraxia. Subjects with AD who were apraxic hadnormal motor learning. In addition, praxis score did not correlate with performance on theskill-acquisition task. The results suggest that ideomotor praxis and motor learning are at leastpartly dissociable. Copyright (C) 1999 Elsevier Science B.V.