Abstract
Purpose of Review
Parkinson’s disease was studied for a long time from the prism of a motor impairment. Recent advances have outlined the importance of cognitive and neuropsychiatric symptoms (NPS) in the PD equation. This review concentrates on the present possibilities of using neuroimaging techniques in order to quantify the cognitive performance and NPS in PD patients.
Recent Findings
Mild cognitive impairment as well as many NPS have been acknowledged as important criteria for assessing the quality of life in patients with Parkinson’s disease and have been shown as potential factors in predicting further evolution of PD from a clinical perspective. Some NPS strongly influence cognition (depression, REM sleep behavior disorder), while others are less specifically associated with it (impulse control disorders). Neuroimaging techniques reported specific structural, functional, and metabolic brain changes that might be specific for each NPS type.
Summary
Recent neuroimaging advances report a strong interrelation between NPS and cognitive performance in PD. A special place for consideration is given to REM sleep behavior disorder, depression, and hallucinations. Nevertheless, some studies report distinct results, outlining that the neuroimaging acquisition and analysis techniques still have limitations and also likely represent the complexity of the manifestation of NPS in PD.
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Acknowledgements
This work was funded by an operating grant from the Canadian Institutes of Health Research (CIHR) (MOP-126017), the Canada Research Chair in non-motor deficits in Parkinson’s disease, and the Tourmaline Oil Chair in Parkinson’s disease to Oury Monchi. Alexandru Hanganu received a basic research fellowship funded by the Parkinson Society Canada (PSC), Quebec Parkinson Network (QPN), and Parkinson Society Quebec’s (PSQ) Research Fund on Parkinson and a postdoctoral fellowship from Parkinson Alberta.
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Alexandru Hanganu and Oury Monchi each declare no potential conflicts of interest.
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Hanganu, A., Monchi, O. Interaction Between Neuropsychiatric Symptoms and Cognitive Performance in Parkinson’s Disease: What Do Clinical and Neuroimaging Studies Tell Us?. Curr Neurol Neurosci Rep 18, 91 (2018). https://doi.org/10.1007/s11910-018-0907-6
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DOI: https://doi.org/10.1007/s11910-018-0907-6