More Severe Functional Impairment in Dementia With Lewy Bodies Than Alzheimer Disease Is Related to Extrapyramidal Motor Dysfunction

The nature of functional disability differs between AD and DLB with additional impairments in mobility and self-care in DLB being mainly attributable to extrapyramidal motor symptoms. Consideration of these is important in assessment and management. Activities of daily living scales for use in this population should attribute the extent to which functional disabilities are related to cognitive, psychiatric, or motor dysfunction.