Journal of neurology, neurosurgery, and psychiatry
-
J. Neurol. Neurosurg. Psychiatr. · Oct 2012
Prevalence and phenomenology of olfactory hallucinations in Parkinson's disease.
Although visual hallucinations in Parkinson's disease (PD) have been described in several major studies, little is known about olfactory hallucinations (OHs). ⋯ In conclusion, OHs should be added to the list of non-motor PD symptoms that can occur early or late in the course of PD. The authors' study did not reveal any significant difference in terms of olfactory abilities between patients with or without OHs. However, olfactory impairment is well documented in Parkinsonian patients and cannot be totally ruled out as a risk factor for OHs. The authors recognise that complex mechanisms are probably involved in this phenomenon.