Evidence map›Paper›PMID 27866119›Full record

ArticleClinical neurophysiology : official journal of the International Federation of Clinical Neurophysiology2017

Group III/IV locomotor muscle afferents alter motor cortical and corticospinal excitability and promote central fatigue during cycling exercise.

Simranjit K Sidhu, Joshua C Weavil, Tyler S Mangum, Jacob E Jessop, Russell S Richardson, David E Morgan, Markus Amann

Open access · greenAbstract read
In one paragraph

Article in Clinical neurophysiology : official journal of the International Federation of Clinical Neurophysiology, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 56 papers.

0numbers the graph read from it
0cells of the map it votes in
56citing papers in PubMed
13.8field-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

56 citing papers in PubMed, 123 citations in OpenAlex.

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  11. Multimodal neuroimaging of fatigability development.Imaging neuroscience (Cambridge, Mass.) · 2025
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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 4 institutions in 2 countries.

Simranjit K SidhuDepartment of Internal Medicine, University of Utah, Salt Lake City, Utah, United States; Discipline of Physiology, Adelaide Medical School, The University of Adelaide, Australia. Electronic address: simran.sidhu@adelaide.edu.au.
Joshua C WeavilDepartment of Exercise & Sport Science, University of Utah, Salt Lake City, Utah, United States.
Tyler S MangumDepartment of Exercise & Sport Science, University of Utah, Salt Lake City, Utah, United States.
Jacob E JessopDepartment of Anaesthesiology, University of Utah, Salt Lake City, Utah, United States.
Russell S RichardsonDepartment of Internal Medicine, University of Utah, Salt Lake City, Utah, United States; Department of Exercise & Sport Science, University of Utah, Salt Lake City, Utah, United States; Geriatric Research, Education & Clinical Center, VA Medical Center, Salt Lake City, Utah, United States.
David E MorganDepartment of Anaesthesiology, University of Utah, Salt Lake City, Utah, United States.
Markus AmannDepartment of Internal Medicine, University of Utah, Salt Lake City, Utah, United States; Department of Exercise & Sport Science, University of Utah, Salt Lake City, Utah, United States; Department of Anaesthesiology, University of Utah, Salt Lake City, Utah, United States; Geriatric Research, Education & Clinical Center, VA Medical Center, Salt Lake City, Utah, United States.
University of Utah · USGeriatric Research Education and Clinical Center · USLake City VA Medical Center · USUniversity of Adelaide · AU

Funding

Role of Sensory Neurons in Human Cardiovascular DiseaseR01HL116579 · NHLBI · UNIVERSITY OF UTAH · PI AMANN, MARKUS · 2013 to 2021
$3.4M
Work of Breathing and Oxidative Stress in COPD: Impact on Blood Flow and FatigueR00HL103786 · NHLBI · UNIVERSITY OF UTAH · PI AMANN, MARKUS · 2013 to 2015
$738k
Respiratory muscle work and oxidative stress in COPD: impact on leg blood flow anK99HL103786 · NHLBI · UNIVERSITY OF UTAH · PI AMANN, MARKUS · 2010 to 2011
$161k
Premature fatigue in veterans with heart failure: neuronal influencesI21RX001572 · VA · VA SALT LAKE CITY HEALTHCARE SYSTEM · PI AMANN, MARKUS · 2015 to 2016
–
NHLBI NIH HHS K99 HL103786NHLBI NIH HHS R00 HL103786NHLBI NIH HHS R01 HL116579RRD VA I21 RX001572
6 · The paper itself

Abstract

objectiveTo investigate the influence of group III/IV muscle afferents on the development of central fatigue and corticospinal excitability during exercise.

methodsFourteen males performed cycling-exercise both under control-conditions (CTRL) and with lumbar intrathecal fentanyl (FENT) impairing feedback from leg muscle afferents. Transcranial magnetic- and cervicomedullary stimulation was used to monitor cortical versus spinal excitability.

resultsWhile fentanyl-blockade during non-fatiguing cycling had no effect on motor-evoked potentials (MEPs), cervicomedullary-evoked motor potentials (CMEPs) were 13±3% higher (P<0.05), resulting in a decrease in MEP/CMEP (P<0.05). Although the pre- to post-exercise reduction in resting twitch was greater in FENT vs. CTRL (-53±3% vs. -39±3%; P<0.01), the reduction in voluntary muscle activation was smaller (-2±2% vs. -10±2%; P<0.05). Compared to the start of fatiguing exercise, MEPs and CMEPs were unchanged at exhaustion in CTRL. In contrast, MEPs and MEP/CMEP increased 13±3% and 25±6% in FENT (P<0.05).

conclusionDuring non-fatiguing exercise, group III/IV muscle afferents disfacilitate, or inhibit, spinal motoneurons and facilitate motor cortical cells. In contrast, during exhaustive exercise, group III/IV muscle afferents disfacilitate/inhibit the motor cortex and promote central fatigue. SIGNIFICANCE: Group III/IV muscle afferents influence corticospinal excitability and central fatigue during whole-body exercise in humans.

Indexed as

Action PotentialsAfferent PathwaysBicyclingEvoked Potentials, MotorExerciseHumansMaleMotor CortexMuscle ContractionMuscle FatiguePyramidal TractsQuadriceps MuscleRandom AllocationYoung AdultBrainCentral nervous systemCervicomedullary stimulationNeural blockadeTranscranial magnetic stimulation

Identifiers

PMID27866119
PMCPMC5240388
OpenAlexW2536123395

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.