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Günter U Höglinger, Daniel Alvarez-Fischer, Oscar Arias-Carrión, Miriam Djufri, Andrea Windolph, Ursula Keber, Andreas Borta, Vincent Ries, Rainer K W Schwarting, Dieter Scheller, Wolfgang H Oertel
Parkinson disease (PD) is a neurodegenerative disorder characterized by massive loss of midbrain dopaminergic neurons. Whereas onset of motor impairments reflects a rather advanced stage of the disorder, hyposmia often marks the beginning of the disease. Little is known about the role of the nigro-striatal system in olfaction under physiological conditions and the anatomical basis of hyposmia in PD. Yet, the early occurrence of olfactory dysfunction implies that pathogens such as environmental toxins could incite the disease via the olfactory system...
September 2015: Acta Neuropathologica
Lin-Jie Zhang, Ning Zhao, Ying Fu, Da-Qi Zhang, Jing Wang, Wen Qin, Ningnannan Zhang, Kristofer Wood, Yaou Liu, Chunshui Yu, Fu-Dong Shi, Li Yang
Few data were available for the understanding of olfactory function in neuromyelitis optica spectrum disorders (NMOSDs). The aims of our study were to investigate the incidence of olfactory dysfunction and characterize olfactory structures, using MRI, in patients with NMOSDs. Olfactory function was evaluated by olfactometer in 49 patients with NMOSDs and 26 matched healthy controls. MRI parameters such as olfactory bulb (OB) and the olfactory-related gray matter volume changes were assessed. The frequency of olfactory dysfunction was 53% in patients with NMOSDs...
August 2015: Journal of Neurology
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