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Saturday January 30, 10:22

Parkinson: Smell disorders can be a sign?

Olfactory disorders appera in 40 to 90% of Parkinson's patients
Olfactory disorders appera in 40 to 90% of Parkinson's patients

Disorders of smell allow earlier diagnosis of Parkinson's disease? This is the idea that developing specialists in a study resumed recently in the Journal of International Medicine (JIM).

Firstly, the authors point out that the diagnosis of this disease is sometimes difficult and it relies mainly on clinical criteria. In other words, it does not require further evaluation, but follow-up for several years.

A situation that does not meet the doctors who would like to detect this disease at an early stage with more certainty. Many researchers have yet attempted to identify elements that could guide the diagnostics: magnetic resonance imaging (MRI) scan, ultrasound of specific areas of the brain, etc. Unfortunately, none gives complete satisfaction.

Scientinsts study one more track: the fact that Parkinson's often suffer from disorders of smell.

Overall, various studies - based on specialized tests that evaluate olfaction using five very distinctive odors (gasoline, cinnamon, pineapple, banana, smoke) - indicate that the prevalence of olfactory disorders ranges from 40% to over 90% in Parkinson's disease.

This is explained by the fact that the degenerative process of the disease can affect areas involved in olfaction. The authors of this work specify that the assessment of olfactory functions has a number of limits. It depends on the sociocultural level, verbal ability on recall and recognition of information, and also sex, because women have higher abilities than men.

Moreover, these specialists can not say that olfactory tests will distinguish Parkinson's disease from other conditions which may affect olfaction, particularly among the elderly.


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