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RESEARCH PRODUCT

The effect of paired associative stimulation on fatigue resistance

Vesa LinnamoSinikka PeuralaJussi PeltonenAndrew G. CresswellMarkus GruberJanne AvelaSusanne Kumpulainen

subject

AdultMalepaired associative stimulationmedicine.medical_treatmentStimulationIsometric exerciseta3112Young AdultPaired associative stimulationFatigue resistancemotor cortextranscranial magnetic stimulationmedicineHumansddc:796Muscle Skeletalta315skin and connective tissue diseasesSoleus muscleNeuronal PlasticityGeneral NeuroscienceHealthy subjectsFatigue; Central fatigue; Motor cortex; Transcranial magnetic stimulation; Paired associative stimulationGeneral MedicineEvoked Potentials Motorcentral fatigueTranscranial magnetic stimulationmedicine.anatomical_structureMuscle FatigueFemalefatiguesense organsPsychologyNeuroscienceMotor cortex

description

Paired associative stimulation (PAS) is a non-invasive stimulation method developed to induce bidirectional changes in the excitability of the cortical projections to the target muscles. However, very few studies have shown an association between changes in motor evoked potentials (MEP) after PAS and behavioral changes in healthy subjects. In the present study we hypothesized that the functional relevance of PAS can be seen during fatiguing exercise, since there is always a central contribution to the development of fatigue. Transcranial magnetic stimulation was applied over the motor cortex to measure changes in the MEPs of the soleus muscle before and after PAS. Furthermore, fatigue resistance was tested during 15s sustained maximal isometric contractions before and after PAS. On average, fatigue resistance did not change after PAS, however the change in excitability correlated significantly with the change in fatigue resistance. Discussion: Functionality of PAS intervention was not demonstrated in this study. However, the observed relationship between excitability and fatigue resistance suggests that PAS might have affected central fatigue during short maximal contractions. (C) 2015 Elsevier Ireland Ltd and the Japan Neuroscience Society. All rights reserved.

yearjournalcountryeditionlanguage
2015-01-01
10.1016/j.neures.2015.01.015