A single session of submaximal grip strength training with or without high-definition anodal-TDCS produces no cross-education of maximal force

Document title: A single session of submaximal grip strength training with or without high-definition anodal-TDCS produces no cross-education of maximal force
Journal: Brazilian Journal of Motor Behavior
System number: 000443481
ISSN: 2446-4902
Authors: 1
Institutions: 1Monash University, Faculty of Medicine, Nursing and Health Science, Melbourne, Victoria. Australia
2St Mary’s University, Faculty of Sport, Health and Applied Sciences, Twickenham. Reino Unido
3La Trobe University, College of Science, Health and Engineering, Melbourne, Victoria. Australia
4University of Groningen, University Medical Center Groningen, Groningen. Países Bajos
Volumen: 15
Number: 3
Pages: 216-236
Country: Brasil
Language: Inglés
Document type: Artículo
Approach: Analítico, descriptivo
English abstract Previous studies suggest that cross-education of strength may be modulated by increased corticospinal excitability of the ipsilateral primary motor cortex (M1) due to cross-activation. Conventional anodal-transcranial direct current stimulation (TDCS) has been shown to acutely increase bilateral cortical excitability and impart a cross-education effect. However, no study has examined the influence of bilateral TDCS of both M1 (i.e., ipsi-and contralateral M1) and how it affects corticospinal excitability, cross-activation and cross-education of muscle strength.METHOD: Twelve participants (8 women and 4 men; aged 18-50 years) underwent three conditions in a randomized crossover design: (1) submaximal grip training and single-site unilateral-high definition-TDCS (ipsilateral to the training side) (2) submaximal grip training and bilateral anodal-high definition-TDCS, and (3) submaximal grip training and sham-high definition-TDCS. Submaximal gripping task involved a single-session of unilateral training which was squeezing the transducer at 70% of maximum voluntary isometric contraction (MVIC) grip force and performing four sets of 10 isometric contractions held steadily for 5 seconds. Anodal-high definition-TDCS was applied for 15 min at 1.5 mA over right M1 (unilateral single-site) or left and right M1s (bilateral), and in a sham condition during submaximal grip training. Participants were pseudorandomized to receive either single-site or bilateral M1 stimulation with each session separated by one-week. Before and after each session, MVIC force of ipsilateral and contralateral gripping, ipsilateral stimulus-response curve, short-interval intracortical inhibition (SICI), cortical silent period (CSP), intracortical facilitation (ICF), long-interval intracortical inhibition (LICI), and cross-activation were measured, using transcranial magnetic stimulation (TMS) targeting the wrist flexor/extensor muscles
Disciplines: Medicina
Keyword: Terapéutica,
Estimulación transcraneal por corriente directa,
Corteza motora,
Entrenamiento de fuerza,
Keyword: Therapeutics,
Transcranial direct current stimulation,
Motor cortex,
Strength training,
Physical therapy
Full text: https://socibracom.com/bjmb/index.php/bjmb/article/view/223/208