Sep 17, 2018 Olfactory Deficits Common in Parkinson Disease, May Be Linked to Frontal Lobe Dysfunction Olfactory Deficits Common in Parkinson Disease, May Be Linked to Frontal Lobe Dysfunction... (PD) and these deficits may be correlated with frontal lobe dysfunction, according to study results published in Clinical Neurology and Neurosurgery. ... read morePublished on 2018-09-17