Manual Dexterity Modifications After Application of tSMS Over the Primary Motor Cortex (M1)
Hand Grip Strength and Manual Dexterity Modifications After Application of Transcranial Static Magnetic Field Stimulation (tSMS) Over the Primary Motor Cortex (M1) in Healthy Subjects
Transcranial static magnetic field stimulation (tSMS) is a novel brain stimulation technique that has been shown to be safe and effective in modifying biological parameters when applied to the cerebral cortex. Its application decreases cortical excitability, regardless of the polarity of the magnetic field, reducing the amplitude of motor evoked potentials (MEP). tSMS is presented as a potentially useful tool in the management of the interhemispheric inhibition, a condition present in neurological pathologies such as stroke or multiple sclerosis. Despite having demonstrated neurophysiological effects in previous studies, the effects of tSMS application on force production and manual dexterity, have not yet been clearly established.
The present study aims to evaluate changes in force production, manual dexterity, and fatigue after unilateral application of a tSMS session on the primary motor cortex (M1). It is hypothesized that the application of tSMS will momentarily decrease the parameters of strength and manual dexterity in the upper limb contralateral to the stimulated cortex, without changes in the strength and dexterity of the unstimulated hemibody. These parameters may show an increase in the unstimulated hemibody. If the hypothesis is confirmed, it could be considered a valid treatment for health conditions presenting interhemispheric inhibition.
Aperçu de l'étude
Statut
Les conditions
Intervention / Traitement
Type d'étude
Inscription (Anticipé)
Phase
- N'est pas applicable
Contacts et emplacements
Lieux d'étude
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Madrid
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Alcorcón, Madrid, Espagne, 28922
- Recrutement
- Universidad Rey Juan Carlos
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Contact:
- Francisco Molina-Rueda, PhD
- Numéro de téléphone: +034 661614359
- E-mail: francisco.molina@urjc.es
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Critères de participation
Critère d'éligibilité
Âges éligibles pour étudier
Accepte les volontaires sains
Sexes éligibles pour l'étude
La description
Inclusion Criteria:
- Age between 18 and 60 years.
- Absence of cognitive impairment.
- Adequate understanding of verbal and written information, sufficient to complete the tests.
Exclusion Criteria:
- Presence of metallic implants (e.g., neurostimulator, pacemaker, cochlear implant, or metallic elements in the head or around the eyes).
- Diagnosis of epilepsy or being under treatment with antiepileptic drugs.
- Diagnosis of unstable cardiovascular disease.
- Diagnosis of any disease or condition that may interfere with this study.
- Use of drugs that may influence with neuromuscular function (muscle relaxants or some analgesics...).
Plan d'étude
Comment l'étude est-elle conçue ?
Détails de conception
- Objectif principal: Recherche sur les services de santé
- Répartition: Randomisé
- Modèle interventionnel: Affectation parallèle
- Masquage: Quadruple
Armes et Interventions
Groupe de participants / Bras |
Intervention / Traitement |
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Expérimental: tSMS
Real tSMS stimulation.
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30-minute tSMS application in a comfortable seated position.
The material used in the stimulation was a MAGxx1.1 helmet (Neurek Spain Toledo), with a Neodymium (NdFeB) magnet of 60mm diameter and 30mm height with Nickel (Ni-Cu-Ni) coating MAG60r+ (Neurek Spain, Toledo), placed over the primary motor cortex (M1) of the left cerebral hemisphere.
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Comparateur factice: Sham tSMS
Sham tSMS stimulation.
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30-minute sham tSMS application in a comfortable seated position.
The device used in sham stimulation had the same weight and shape as the real stimulation helmet.
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Que mesure l'étude ?
Principaux critères de jugement
Mesure des résultats |
Description de la mesure |
Délai |
|---|---|---|
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Finger Tapping Test (FTT)
Délai: 5 minutes
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was performed for assessment of manual motor skills.
This test has been used for many years in the neuropsychological assessment of brain damage, being an indicator of cortical activity, as well as being used in NIBS studies as a measure of manual dexterity.
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5 minutes
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Nine-Hole Peg Test (9HPT)
Délai: 5 minutes
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Was used to assess finger dexterity; this tool has been used in the assessment of motor activity in a multitude of pathologies, with adequate to excellent inter-rater reliability and excellent inter-rater reliability in healthy adults.
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5 minutes
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Mesures de résultats secondaires
Mesure des résultats |
Description de la mesure |
Délai |
|---|---|---|
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Hand grip strength
Délai: 5 minutes
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Upper extremity force production was assessed by grip testing; a hand-held dynamometer (Jamar Plus+; Sammons Preston, Rolyon, Bolingbrook, IL) was used for this purpose.
Greater hand grip strength corresponds with greater activation in M1, premotor area (PMA), and supplementary motor area (SMA) in the dominant hemisphere, and of the SMA in the nondominant hemisphere, and may provide information about the functionality of the human brain.
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5 minutes
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Collaborateurs et enquêteurs
Parrainer
Dates d'enregistrement des études
Dates principales de l'étude
Début de l'étude (Réel)
Achèvement primaire (Anticipé)
Achèvement de l'étude (Anticipé)
Dates d'inscription aux études
Première soumission
Première soumission répondant aux critères de contrôle qualité
Première publication (Réel)
Mises à jour des dossiers d'étude
Dernière mise à jour publiée (Réel)
Dernière mise à jour soumise répondant aux critères de contrôle qualité
Dernière vérification
Plus d'information
Termes liés à cette étude
Termes MeSH pertinents supplémentaires
Autres numéros d'identification d'étude
- URJCtSMS100222
Plan pour les données individuelles des participants (IPD)
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Informations sur les médicaments et les dispositifs, documents d'étude
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