Olfactory Dysfunction in COVID-19

Olfactory Dysfunction and Phantosmia in Patients With COVID-19 in Northern Iran

Background: One of the most common symptoms of COVID-19 infection is Olfactory Dysfunction (OD). Objectives: This study aims to investigate OD and phantosmia in COVID-19 cases from northern Iran. Materials & Methods: In this cross-sectional study, participants were 400 patients with COVID-19 infection in Rasht, Iran from March 2019 to September 2020. All the patients were evaluated in terms o...

COVID-19: The potential role of nutritional deficiencies, global climatic changes, and immune system dysfunction

Olfactory dysfunction in Alzheimer's disease.

Alzheimer's disease (AD) is a common neurodegenerative disorder with the earliest clinical symptom of olfactory dysfunction, which is a potential clinical marker for AD severity and progression. However, many questions remain unanswered. This article reviews relevant research on olfactory dysfunction in AD and evaluates the predictive value of olfactory dysfunction for the epidemiological, path...

Olfactory Dysfunction in Parkinson’s Disease

Prior to the onset of the cardinal motor features of idiop athic Parkinson‘s disease (PD), other manifestations of neurodegeneration such as olfactory dysfunction are often apparent. Characterizing these potential biomarkers of preclinical PD is particularly important in identifying individuals who will go on to develop disabling symptoms, and thus be good candidates for new neuroprotective str...

Olfactory dysfunction in Parkinson's disease.

An olfactory function test in 18 patients with Parkinson's disease (PD) and 10 age-matched control subjects was performed. Both detection and recognition thresholds were measured with five kinds of synthesized odorants (T & T olfactometry). Before each test, rhinoscopic inspections were performed to exclude subjects who could have respiratory hyposmia. Both detection and recognition thresholds ...