Evidence map›Paper›PMID 32217286›Full record

ArticleComputers in biology and medicine2020

Can motor function uncertainty and local instability within upper-extremity dual-tasking predict amnestic mild cognitive impairment and early-stage Alzheimer's disease?

Hossein Ehsani, Saman Parvaneh, Jane Mohler, Christopher Wendel, Edward Zamrini, Kathy O'Connor, Nima Toosizadeh

Open access · greenAbstract read
In one paragraph

Article in Computers in biology and medicine, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 20 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
20citing papers in PubMed, 1 pooled it
1.9field-weighted citation impact, top 14% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

20 citing papers in PubMed, 1 synthesis or guideline pooled it, 22 citations in OpenAlex.

  1. Pooled it
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  6. Differences in brain function entropy due to cognitive impairment: Application of functional near infrared spectroscopy measures during dual-tasking.International journal of psychophysiology : official journal of the International Organization of Psychophysiology · 2025
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  16. Dual-task performance is associated with brain MRI Morphometry in individuals with mild cognitive impairment.Journal of neuroimaging : official journal of the American Society of Neuroimaging · 2021
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  17. Review
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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

7 authors at 3 institutions in 1 country.

Hossein EhsaniDepartment of Biomedical Engineering, University of Arizona, Tucson, AZ, USA; Department of Kinesiology, University of Maryland, College Park, MD, USA. Electronic address: hehsani@umd.edu.
Saman ParvanehPhilips Research North America, Cambridge, MA, USA.
Jane MohlerDepartment of Biomedical Engineering, University of Arizona, Tucson, AZ, USA; Arizona Center on Aging (ACOA), Department of Medicine, University of Arizona, College of Medicine, Tucson, AZ, USA; Division of Geriatrics, General Internal Medicine and Palliative Medicine, Department of Medicine, University of Arizona, Tucson, AZ, USA.
Christopher WendelArizona Center on Aging (ACOA), Department of Medicine, University of Arizona, College of Medicine, Tucson, AZ, USA; Division of Geriatrics, General Internal Medicine and Palliative Medicine, Department of Medicine, University of Arizona, Tucson, AZ, USA.
Edward ZamriniBanner Sun Health Research Institute, Sun City, AZ, USA; Banner Alzheimer's Institute, University of Arizona, Tucson, AZ, USA; Department of Neurology, University of Utah, Salt Lake City, UT, USA.
Kathy O'ConnorBanner Sun Health Research Institute, Sun City, AZ, USA; Banner Alzheimer's Institute, University of Arizona, Tucson, AZ, USA.
Nima ToosizadehDepartment of Biomedical Engineering, University of Arizona, Tucson, AZ, USA; Arizona Center on Aging (ACOA), Department of Medicine, University of Arizona, College of Medicine, Tucson, AZ, USA; Division of Geriatrics, General Internal Medicine and Palliative Medicine, Department of Medicine, University of Arizona, Tucson, AZ, USA.
University of Arizona · USBanner Sun Health Research Institute · USPhilips (United States) · US

Funding

MCI and Alzheimer's Disease Screening using Upper-extremity Dual-taskR21AG055852 · NIA · UNIVERSITY OF ARIZONA · PI MOHLER, MARTHA JANE, TOOSIZADEH, NIMA · 2017 to 2018
$431k
NIA NIH HHS R21 AG055852
6 · The paper itself

Abstract

In this study, we examined the uncertainty and local instability of motor function for cognitive impairment screening using a previously validated upper-extremity function (UEF). This approach was established based upon the fact that elders with an impaired executive function have trouble in the simultaneous execution of a motor and a cognitive task (dual-tasking). Older adults aged 65 years and older were recruited and stratified into 1) cognitive normal (CN), 2) amnestic MCI of the Alzheimer's type (aMCI), and 3) early-stage Alzheimer's Disease (AD). Participants performed normal-paced repetitive elbow flexion without counting and while counting backward by ones and threes. The influence of cognitive task on motor function was measured using uncertainty (measured by Shannon entropy), and local instability (measured by the largest Lyapunov exponent) of elbow flexion and compared between cognitive groups using ANOVAs, while adjusting for age, sex, and BMI. We developed logistic ordinal regression models for predicting cognitive groups based on these nonlinear measures. A total of 81 participants were recruited, including 35 CN (age = 83.8 ± 6.9), 30 aMCI (age = 83.9 ± 6.9), and 16 early AD (age = 83.2 ± 6.6). Uncertainty of motor function demonstrated the strongest associations with cognitive impairment, with an effect size of 0.52, 0.88, and 0.51 for CN vs. aMCI, CN vs. AD, and aMCI vs. AD comparisons, respectively. Ordinal logistic models predicted cognitive impairment (aMCI and AD combined) with a sensitivity and specificity of 0.82. The findings accentuate the potential of employing nonlinear dynamical features of motor functions during dual-tasking, especially uncertainty, in detecting cognitive impairment.

Indexed as

Alzheimer DiseaseCognitive DysfunctionAgedAged, 80 and overHumansNeuropsychological TestsUncertaintyUpper ExtremityBiomechanicsComputer modelingEarly detectionExecutive functionLargest Lyapunov exponentMCIMotor controlNonlinear dynamical systemsShannon entropyWearable motion sensors

Identifiers

PMID32217286
PMCPMC7415325
OpenAlexW3012020375

What OpenQuestion holds

Textmetadata
LicenceTDM
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.