- Loss of sense of smell is a classic early finding in Parkinson’s disease.
How to Perform
- Ask the patient whether their sense of smell has been abnormal recently. Ask them to close their eyes and present common smells such as hand sanitizer, coffee, peppermint etc. and ask the patient to identify them.
Causes of Anosmia
- Mechanical anosmia - inflammation of nasal mucosa, blockage of nasal passages
- Olfactory anosmia - blunt trauma, frontal lobe damage, meningitis, neurosyphillis
- Parkinson’s disease
- Congenital anosmia