Evidence map›Paper›PMID 31773755›Full record

ArticleMuscle & nerve2020

Myotonic dystrophy type 1 alters muscle twitch properties, spinal reflexes, and perturbation-induced trans-cortical reflexes.

Richard K Shields, Jinhyun Lee, Aaron Buelow, Michael Petrie, Shauna Dudley-Javoroski, Stephen Cross, Laurie Gutmann, Peggy C Nopoulos

Open access · greenAbstract read
In one paragraph

Article in Muscle & nerve, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 5 papers.

0numbers the graph read from it
0cells of the map it votes in
5citing papers in PubMed
0.3field-weighted citation impact, top 45% 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

5 citing papers in PubMed, 6 citations in OpenAlex.

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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

8 authors at 1 institution in 1 country.

Richard K ShieldsDepartment of Physical Therapy and Rehabilitation Science, Roy J. and Lucille A. Carver College of Medicine, University of Iowa, Iowa City, Iowa.
Jinhyun LeeDepartment of Physical Therapy and Rehabilitation Science, Roy J. and Lucille A. Carver College of Medicine, University of Iowa, Iowa City, Iowa.
Aaron BuelowDepartment of Physical Therapy and Rehabilitation Science, Roy J. and Lucille A. Carver College of Medicine, University of Iowa, Iowa City, Iowa.
Michael PetrieDepartment of Physical Therapy and Rehabilitation Science, Roy J. and Lucille A. Carver College of Medicine, University of Iowa, Iowa City, Iowa.
Shauna Dudley-JavoroskiDepartment of Physical Therapy and Rehabilitation Science, Roy J. and Lucille A. Carver College of Medicine, University of Iowa, Iowa City, Iowa.
Stephen CrossDepartment of Psychiatry, Roy J. and Lucille A. Carver College of Medicine, University of Iowa, Iowa City, Iowa.
Laurie GutmannDepartment of Neurology, Roy J. and Lucille A. Carver College of Medicine, University of Iowa, Iowa City, Iowa.
Peggy C NopoulosDepartment of Psychiatry, Roy J. and Lucille A. Carver College of Medicine, University of Iowa, Iowa City, Iowa.
University of Iowa · US

Funding

The University of Iowa Clinical and Translational Science AwardUL1TR002537 · NCATS · UNIVERSITY OF IOWA · PI HANSEN, MARLAN R, WINOKUR, PATRICIA · 2018 to 2022
$20.0M
Longitudinal Assessment of Brain Structure and Function in Myotonic DystrophyR01NS094387 · NINDS · UNIVERSITY OF IOWA · PI NOPOULOS, PEGGY C · 2015 to 2019
$4.1M
The University of Iowa Clinical and Translational Science AwardKL2TR002536 · NCATS · UNIVERSITY OF IOWA · PI BASSUK, ALEXANDER G · 2018 to 2022
$3.3M
Long Duration Activity and Metabolic Control after Spinal Cord InjuryR01HD082109 · NICHD · UNIVERSITY OF IOWA · PI SHIELDS, RICHARD K. · 2015 to 2019
$1.6M
Musculoskeletal Plasticity after Spinal Cord InjuryR01HD084645 · NICHD · UNIVERSITY OF IOWA · PI SHIELDS, RICHARD K. · 2015 to 2019
$1.6M
NCATS NIH HHS KL2 TR002536NCATS NIH HHS UL1 TR002537NICHD NIH HHS R01 HD082109NICHD NIH HHS R01 HD084645NINDS NIH HHS R01 NS094387
6 · The paper itself

Abstract

backgroundNeurophysiologic biomarkers are needed for clinical trials of therapies for myotonic dystrophy (DM1). We characterized muscle properties, spinal reflexes (H-reflexes), and trans-cortical long-latency reflexes (LLRs) in a cohort with mild/moderate DM1.

methodsTwenty-four people with DM1 and 25 matched controls underwent assessment of tibial nerve H-reflexes and soleus muscle twitch properties. Quadriceps LLRs were elicited by delivering an unexpected perturbation during a single-limb squat (SLS) visuomotor tracking task.

resultsDM1 was associated with decreased H-reflex depression. The efficacy of doublet stimulation was enhanced, yielding an elevated double-single twitch ratio. DM1 participants demonstrated greater error during the SLS task. DM1 individuals with the least-robust LLR responses showed the greatest loss of spinal H-reflex depression.

conclusionsDM1 is associated with abnormalities of muscle twitch properties. Co-occurring alterations of spinal and trans-cortical reflex properties underscore the central nervous system manifestations of this disorder and may assist in gauging efficacy during clinical trials.

Indexed as

H-ReflexAdultCohort StudiesElectric StimulationElectrodiagnosisElectromyographyFemaleHumansMaleMiddle AgedMuscle ContractionMuscle, SkeletalMyotonic DystrophyReflex, AbnormalSpineexcitation-contraction couplinghomosynaptic depressionH-reflexlong-latency reflexmuscle plasticityperturbation

Identifiers

PMID31773755
PMCPMC7711310
OpenAlexW2991143525

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.