Behavioral & Cognitive Disorders
Hyposmia in neurodegenerative disorders
Olfactory deficits involving odor detection, identification, and discrimination are very common early in the course of Parkinson disease and dementia with Lewy bodies. Odor identification is also impaired in patients with REM sleep behavior disorder, a common and very early feature of Lewy body alpha-synucleinopathies. Less commonly, some degree of olfactory loss has also been reported in various other dementing disorders, including Alzheimer disease and frontotemporal dementia.
Oct. 21, 2020