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Unilateral Wrist Extension Training After Stroke

29 agosto 2017 aggiornato da: Dr. E. Paul Zehr, University of Victoria

Following stroke, muscle weakness and impaired motor function are expressed in both the more (MA; paretic) and less affected (LA; non-paretic) sides. Although the efficacy of resistance training is well recognized, training the MA limb directly may be initially difficult due to muscular weakness. "Cross-education" is training one side of the body increases strength in the untrained and opposite side. This concept can be applied in strength training when training the more affected sides cannot be initiated. Recently, our lab found six weeks of dorsiflexion resistance training in the LA leg improved the strength of both trained and untrained legs of chronic stroke participants.

The current project explored if cross-education exists in the upper limb in chronic stroke participants and if there are related changes in cortical and spinal cord plasticity. We hypothesized that unilateral strength in the less affected arm could enhance wrist extension strength bilaterally with related neural adoption and improved clinical function.

Panoramica dello studio

Stato

Completato

Condizioni

Intervento / Trattamento

Descrizione dettagliata

Stroke produces muscle weakness seen on both more (paretic, MA) and less affected (non-paretic, LA) sides. "Cross-education" is training one side of the body increases strength or motor skill in the same muscles on the untrained side. This can be applied to enhance muscle strength in the MA side and we found that 6 weeks of dorsiflexion resistance training with the LA leg improved strength bilaterally in chronic stroke. To explore if cross-education occurs also in the upper limb after stroke, participants will complete a 5-week unilateral wrist extension training.

Twenty four participants will be recruited, 12 from Rehabilitation Neuroscience laboratory at University of Victoria, 12 from Brain Behaviour Laboratory at University of British Columbia. Before and after training, maximal voluntary contraction wrist extension force was measured with a 6-axis load cell using Cartesian coordinates (Fz = extension). Electromyography of extensor and flexor carpi radialis, biceps and triceps brachii were recorded. Fugl-Meyer and partial Wolf Motor Function Test were performed by the same physical therapist at each location. Reciprocal inhibition from wrist flexors to extensors, cutaneous reflexes evoked by median and superficial radial nerve stimulation were assessed in those at UVIC. Cortical silent period, short-interval intracortical inhibition, intracortical facilitation and transcallosal inhibition from transcranial magnetic stimulation were measured in participants at UBC.

Tipo di studio

Interventistico

Iscrizione (Effettivo)

24

Fase

  • Non applicabile

Criteri di partecipazione

I ricercatori cercano persone che corrispondano a una certa descrizione, chiamata criteri di ammissibilità. Alcuni esempi di questi criteri sono le condizioni generali di salute di una persona o trattamenti precedenti.

Criteri di ammissibilità

Età idonea allo studio

  • Bambino
  • Adulto
  • Adulto più anziano

Accetta volontari sani

No

Sessi ammissibili allo studio

Tutto

Descrizione

Inclusion Criteria:

  • Over 6 months post-stroke;
  • One side of arm shows muscle weakness
  • Pass the screening test of Physical Activity Readiness Questionnaire
  • Pass the screening test for dementia
  • Free from dementia (score < 24 on the Montreal Cognitive Assessment) and any other contradiction for TMS test

Exclusion Criteria:

  • Had medication affecting muscle tone within the past 3 months
  • Wear a pacemaker

Piano di studio

Questa sezione fornisce i dettagli del piano di studio, compreso il modo in cui lo studio è progettato e ciò che lo studio sta misurando.

Come è strutturato lo studio?

Dettagli di progettazione

  • Scopo principale: Trattamento
  • Assegnazione: N / A
  • Modello interventistico: Assegnazione di gruppo singolo
  • Mascheramento: Nessuno (etichetta aperta)

Armi e interventi

Gruppo di partecipanti / Arm
Intervento / Trattamento
Sperimentale: Wrist extension training
Participants will join a five-week training protocol with 3 sessions per week. During each session, 5 sets 5 maximal wrist extension training will be performed on participants less affected side.

Cosa sta misurando lo studio?

Misure di risultato primarie

Misura del risultato
Misura Descrizione
Lasso di tempo
Changes in wrist extension force
Lasso di tempo: Week1-3: baselines were measured once per week for three times; Week 4-8: training(no measurement was taken); Week 9: post-test; Week 13: follow-up test
To test if training could improve wrist extension strength, maximal wrist extension force were measured in both arms during the 3 baseline pretests, 1 post-test. There was a week in between each baseline tests, post-test will be performed within one week after the training finished. To test if the force changes maintained after training, follow-up test was performed 5 weeks after training finished.
Week1-3: baselines were measured once per week for three times; Week 4-8: training(no measurement was taken); Week 9: post-test; Week 13: follow-up test

Misure di risultato secondarie

Misura del risultato
Misura Descrizione
Lasso di tempo
Changes in the modulation of spinal-mediated muscle reflexes
Lasso di tempo: Week1-3: baselines were measured once per week for three times; Week 4-8: training(no measurement was taken); Week 9: post-test;
To test if training could induce neural adaptation at spinal level, spinal-mediated muscle reflexes include reciprocal inhibition and cutaneous reflexes in the wrist extensor muscle were measured. Muscle reflex amplitudes were compared before and after training. There was no follow-up test for this measurement
Week1-3: baselines were measured once per week for three times; Week 4-8: training(no measurement was taken); Week 9: post-test;
Neural adaptation in the corticospinal pathway
Lasso di tempo: Week1-3: baselines were measured once per week for three times; Week 4-8: training(no measurement was taken); Week 9: post-test;
To test if training could induced neural adaptation at corticospinal level, cortical silent period, short-interval intracortical inhibition, intracortical facilitation and transcallosal from transcranial magnetic stimulation were measured in wrist extensor muscle. Changes in the muscle reflex amplitudes and cortical silent period duration were compared before and after training. There was no follow-up test for this measurement.
Week1-3: baselines were measured once per week for three times; Week 4-8: training(no measurement was taken); Week 9: post-test;
Upper limb impairment assessments
Lasso di tempo: Week1-3: baselines were measured once per week for three times; Week 4-8: training(no measurement was taken); Week 9: post-test;
Fugl-Meyer test score were assessed by licensed physiotherapists. Scores were compared before and after training. There was no follow-up test for this measurement.
Week1-3: baselines were measured once per week for three times; Week 4-8: training(no measurement was taken); Week 9: post-test;
Upper limb function assessments
Lasso di tempo: Week1-3: baselines were measured once per week for three times; Week 4-8: training (no measurement was taken); Week 9: post-test; Week 13: follow-up test
Wolf Motor Function Test were assessed by licensed physiotherapists. Scores were compared before and after training.
Week1-3: baselines were measured once per week for three times; Week 4-8: training (no measurement was taken); Week 9: post-test; Week 13: follow-up test
Ten-meter walking test
Lasso di tempo: Week1-3: baselines were measured once per week for three times; Week 4-8: training (no measurement was taken); Week 9: post-test;
Walking speed was compared before and after training. There was no follow-up test for this measurement
Week1-3: baselines were measured once per week for three times; Week 4-8: training (no measurement was taken); Week 9: post-test;
Six-minute walking test
Lasso di tempo: Week1-3: baselines were measured once per week for three times; Week 4-8: training(no measurement was taken); Week 9: post-test;
Walking distance was compared before and after training. There was no follow-up test for this measurement
Week1-3: baselines were measured once per week for three times; Week 4-8: training(no measurement was taken); Week 9: post-test;
Timed up and go
Lasso di tempo: Week1-3: baselines were measured once per week for three times; Week 4-8: training(no measurement was taken); Week 9: post-test;
Walking speed was compared before and after training. There was no follow-up test for this measurement.
Week1-3: baselines were measured once per week for three times; Week 4-8: training(no measurement was taken); Week 9: post-test;

Collaboratori e investigatori

Qui è dove troverai le persone e le organizzazioni coinvolte in questo studio.

Sponsor

Collaboratori

Investigatori

  • Investigatore principale: E.Paul Zehr, Rehabilitation Neuroscience Laboratory, University of Victoria

Studiare le date dei record

Queste date tengono traccia dell'avanzamento della registrazione dello studio e dell'invio dei risultati di sintesi a ClinicalTrials.gov. I record degli studi e i risultati riportati vengono esaminati dalla National Library of Medicine (NLM) per assicurarsi che soddisfino specifici standard di controllo della qualità prima di essere pubblicati sul sito Web pubblico.

Studia le date principali

Inizio studio

1 marzo 2015

Completamento primario (Effettivo)

1 luglio 2017

Completamento dello studio (Effettivo)

1 luglio 2017

Date di iscrizione allo studio

Primo inviato

24 agosto 2017

Primo inviato che soddisfa i criteri di controllo qualità

29 agosto 2017

Primo Inserito (Effettivo)

31 agosto 2017

Aggiornamenti dei record di studio

Ultimo aggiornamento pubblicato (Effettivo)

31 agosto 2017

Ultimo aggiornamento inviato che soddisfa i criteri QC

29 agosto 2017

Ultimo verificato

1 agosto 2017

Maggiori informazioni

Termini relativi a questo studio

Altri numeri di identificazione dello studio

  • D015017-2011-2015

Queste informazioni sono state recuperate direttamente dal sito web clinicaltrials.gov senza alcuna modifica. In caso di richieste di modifica, rimozione o aggiornamento dei dettagli dello studio, contattare register@clinicaltrials.gov. Non appena verrà implementata una modifica su clinicaltrials.gov, questa verrà aggiornata automaticamente anche sul nostro sito web .

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