This recently-published letter from two Italian neurologists describes two patients initially diagnosed with parkinsonism. They were both given tests, including the Iowa Gambling Task (IGT), that revealed cognitive dysfunction. About 18 months later, both patients showed limb apraxia (based upon a Movement Imitation Test), resulting in a CBD diagnosis.
The two neurologists conclude: “These neuropsychological findings suggest that, in CBD patients, decision-making may be impaired early in the course of the disease and may sometimes precede the appearance of upper-limb apraxia. These findings also suggest that the IGT is a useful task to detect early cognitive impairments in patients with parkinsonism whose clinical symptoms are suggestive of CBD.”
I’ve copied the citation below.
Robin
Journal of Neuropsychiatry and Clinical Neurosciences. 2011 Winter;23(2):E29.
Letters
Decision-Making Impairment May Precede Limb Apraxia in Corticobasal Degeneration
Michele Poletti, M.D. and Ubaldo Bonuccelli, M.D.
Neurology Unit, USL of Viareggio, Italy Neuroscience Department, University of Pisa.