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Updated: Jul 4, 2026

Dynamic Digital Biomarkers of Motor and Cognitive Function in Parkinson's Disease
Published on: July 24, 2019
Mild cognitive impairment in Parkinson's disease: the challenge and the promise
Hubert H Fernandez1, Gregory P Crucian, Michael S Okun
1Department of Neurology, University of Florida, Gainesville, FL, USA. Fernandez@neurology.ufl.edu
Abstract:
This review addresses the literature surrounding Parkinson's disease (PD) and mild cognitive impairment (MCI). It discusses the neuropsychological, pharmaceutical, and pathological overlap, the socioeconomic impact of PD and MCI, and the value of recognizing, understanding, and treating MCI in PD. It is concluded from this review that MCI in PD does exist and should be considered in clinical and research investigations. Due to the lack of accepted clinical criteria, an inclusive operating definition of MCI in PD is proposed. Research guidelines for studying the presence of MCI in PD and evaluating the efficacy of pharmaceutical interventions are also suggested.
Insights
Mild cognitive impairment (MCI) in Parkinson's disease (PD) is a recognized condition. This review proposes a definition and guidelines for its clinical and research evaluation.
Area of Science:
- Neurology
- Neuroscience
- Cognitive Science
Background:
- Parkinson's disease (PD) is a neurodegenerative disorder.
- Mild cognitive impairment (MCI) is increasingly recognized in PD patients.
- Understanding the overlap between PD and MCI is crucial for patient care.
Purpose of the Study:
- To review the existing literature on Parkinson's disease and mild cognitive impairment.
- To discuss the neuropsychological, pharmaceutical, and pathological connections.
- To propose an operating definition and research guidelines for MCI in PD.
Main Methods:
- Literature review of studies on PD and MCI.
- Analysis of neuropsychological, pharmaceutical, and pathological data.
- Synthesis of findings to establish a consensus.
Main Results:
- Mild cognitive impairment (MCI) is a distinct feature in Parkinson's disease (PD).
- There is significant overlap in pathology and clinical presentation between PD and MCI.
- Current clinical criteria for MCI in PD are lacking.
Conclusions:
- MCI in PD is a valid clinical and research entity.
- An inclusive operating definition for MCI in PD is proposed.
- Guidelines for future research and treatment evaluation are suggested.
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