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Review
. 2014 Feb;30(1):134-40.
doi: 10.1007/s12264-013-1390-3. Epub 2013 Oct 17.

Hyposmia: a possible biomarker of Parkinson's disease

Qian Xiao  1 , Sheng Chen, Weidong Le
Affiliations
Review

Hyposmia: a possible biomarker of Parkinson's disease

Qian Xiao et al. Neurosci Bull. 2014 Feb.

Abstract

Hyposmia, identified as reduced sensitivity to odor, is a common non-motor symptom of Parkinson's disease (PD) that antedates the typical motor symptoms by several years. It occurs in ∼90% of early-stage cases of PD. In addition to the high prevalence, the occurrence of hyposmia may also predict a higher risk of PD. Investigations into hyposmia and its relationship with PD may help elucidate the underlying pathogenic mechanisms. This review provides an update of olfactory dysfunction in PD and its potential as a biomarker for this devastating disease.

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