A progressive neurological disorder characterized by nerve cell loss and atrophy of multiple areas of the brain, including the cerebral cortex and the basal ganglia. Symptoms are similar to those found in parkinson’s disease, such as poor coordination, akinesia, rigidity, disequilibrium, and limb dystonia. Other symptoms such as cognitive and visual-spatial impairments, apraxia, hesitant and halting speech, myoclonus (muscular jerks), and dysphagia may also occur. An individual with CBGD eventually becomes unable to walk. Also known as corticobasal degeneration.