Evidence map›Paper›PMID 27162165›Full record

ArticleNeurorehabilitation and neural repair2016

The Effect of Levodopa on Improvements in Protective Stepping in People With Parkinson's Disease.

Daniel S Peterson, Fay B Horak

Open access · bronzeAbstract read
In one paragraph

Article in Neurorehabilitation and neural repair, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 19 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
19citing papers in PubMed, 1 pooled it
12.9field-weighted citation impact, top 1% 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

19 citing papers in PubMed, 1 synthesis or guideline pooled it, 35 citations in OpenAlex.

  1. Pooled it
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  15. Wearable Devices in Clinical Trials: Hype and Hypothesis.Clinical pharmacology and therapeutics · 2018
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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

2 authors at 1 institution in 1 country.

Daniel S PetersonVeterans Affairs Portland Health Care System (VAPORHCS), Portland, OR, USA Oregon Health and Science University, Portland, OR, USA University of Utah, Salt Lake City, UT, USA dspeterson8@gmail.com.
Fay B HorakVeterans Affairs Portland Health Care System (VAPORHCS), Portland, OR, USA Oregon Health and Science University, Portland, OR, USA.
VA Portland Health Care System · US

Funding

PERIPHERAL AND CENTRAL POSTURAL DISORDERS IN THE ELDERLYR01AG006457 · NIA · OREGON HEALTH & SCIENCE UNIVERSITY · PI HORAK, FAY BAHLING · 1986 to 2018
$5.2M
Frontal Cortex and Gait Freezing in Parkinson's Disease: Rehabilitation ImpactI01RX001075 · VA · PORTLAND VA MEDICAL CENTER · PI HORAK, FAY BAHLING · 2015 to 2017
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Effect of levodopa on postural motor learning in Parkinson diseaseIK1RX001480 · VA · VA SALT LAKE CITY HEALTHCARE SYSTEM · PI PETERSON, DANIEL SOREN · 2015 to 2016
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NIA NIH HHS R01 AG006457RRD VA I01 RX001075RRD VA IK1 RX001480
6 · The paper itself

Abstract

Background The effect of levodopa on postural motor learning in people with Parkinson's disease is poorly understood. In particular, it is unknown whether levodopa affects improvement in protective postural responses after external perturbations such as a slip or trip, a critical aspect of fall prevention. Objective Determine the effect of levodopa on postural motor learning in people with Parkinson's disease. Methods We assessed improvement in protective postural responses in people with Parkinson's disease over short-term (1 day) perturbation training on and off levodopa. We also assessed retention and generalization of improvement. Participants were 22 individuals with Parkinson's disease. The primary outcome was total center of mass (COM) displacement after perturbation. Secondary outcomes assessed first step performance and included margin of stability at first foot contact. Results People with Parkinson's disease improved COM displacement (P = .011) and margin of stability (P = .016) over training. Improvements in these outcomes were more pronounced after training while on levodopa than off levodopa. Levodopa State × Training interactions were not observed for other step performance variables (eg, step latency, length, total number of steps). Improvements were retained for 24 hours, and for margin of stability, retention was more pronounced while on levodopa than off (P = .018). Conclusions Individuals with Parkinson's disease are able to improve protective postural responses through short-term perturbation training, and improvements were more pronounced when on levodopa for some variables. Perturbation training may be more effective if completed while optimally medicated with levodopa.

Indexed as

AgedAntiparkinson AgentsFemaleFollow-Up StudiesGait Disorders, NeurologicGeneralization, PsychologicalHumansLevodopaMaleMiddle AgedParkinson DiseasePostural BalanceRetention, PsychologyAntiparkinson AgentsLevodopalevodopamotor learningParkinson’s diseaseposturestepping

Identifiers

PMID27162165
PMCPMC5048496
OpenAlexW2345451124

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.