Neuropsychological Sequelae of Essential Tremor: A Differential Comparison with Alzheimerís Disease and Parkinsonís Disease
Authors: Samuel T. Gontkovsky Katrina Alexander and William W. Beatty
Abstract: This investigation examined the neuropsychological sequelae of essential tremor by comparing the performance of patients with this condition to that of a healthy elderly control group, patients with Parkinsonís disease, and patients with Alzheimerís disease. The hypothesis that patients with essential tremor would demonstrate significantly poorer scores on measures of neurocognitive status relative to healthy elderly controls but would exhibit significantly better scores on measures of neurocognitive status than the clinical groups was confirmed. Furthermore, the hypothesis that patients with essential tremor would generate performance patterns resembling those of patients with Parkinsonís disease more so than patients with Alzheimerís disease, even when controlling for degree of cognitive impairment among clinical groups, also was confirmed. These results have important clinical implications in the diagnosis and treatment of essential tremor.