PMID: 6540392Aug 1, 1984Paper

Extrapyramidal signs in Alzheimer's disease

Neurology
P K MölsäU K Rinne

Abstract

The occurrence and type of extrapyramidal signs were investigated in 143 patients with dementia of the Alzheimer type. Only 8% of the patients were free of extrapyramidal signs. The most common type of extrapyramidal involvement was a rigid, hypokinetic, and hypomimic pattern. Resting tremor was rarely encountered. Dyskinetic signs, mostly orofacial, were seen in 17%. These observations suggest that in most patients with advanced Alzheimer's disease, there is a striatal dopaminergic hypofunction, appearing clinically as hypokinesia and rigidity. However, some patients exhibit predominantly dyskinetic signs, implying more complex basal ganglia dysfunction.

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