StrokeNCT03194464
Fatiguing Arm Exercise Following Stroke
A study testing submaximal exercise (grip) in people with Stroke, run by VA Office of Research and Development at 1 site in United States.
Trial summary
This study investigates the effects of sub-maximal exercise to task-failure (e.g., fatigue) with the less involved, or so-called non-paretic hand, in people who have experienced a stroke. Read more about this study
- Who is it for?
- Ages 18 years and older
- Conditions the study is for
- Stroke
- What is being tested?
- submaximal exercise (grip)
- Could I receive a placebo?
- No, everyone receives an active treatment
- How many people
- 15 participants
- Where
- 1 siteUnited States
- Study dates
- 1 Feb 2016to 21 May 2018
- Phase
- Interventional
- Are there results?
- Yes, posted in the registrySummary in the doctors' view
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages 18 years and older
- All sexes
- No healthy volunteers
- Adult, Older adult
Who may be able to join
- individuals at least 6 months post-stroke in the cortical or sub-cortical distribution with residual upper-extremity hemiparesis
- Non-Veteran Participants are eligible
Who cannot join
- multiple strokes
- strokes in both hemispheres
- brainstem/medullary/cerebellar stroke
- seizure disorder
- metal implants in head or neck
- pacemaker or other implanted device
- inability to produce any measurable grip force
Trial locations and contacts
1 site in 1 country.
United States1 site
North Florida/South Georgia Veterans Health System, Gainesville, FL
Gainesville, Florida, 32608
About this study
Official title: Neural Mechanisms Mediating Interlimb Transfer Following Stroke
This study investigates the effects of sub-maximal exercise to task-failure (e.g., fatigue) with the less involved, or so-called non-paretic hand, in people who have experienced a stroke. In previous work the investigators found that non-paretic hand exercise to task-failure increased excitability of the motor cortex in the more involved hemisphere and produced behavioral improvements in the unexercised paretic hand. Importantly, the magnitude of increased brain excitability is greater than what has been observed following brain stimulation with either repetitive transcranial magnetic stimulation (TMS) or transcranial direct current stimulation (tDCS) and lasts longer. This approach could be implemented in the clinical setting and could be accessible to a greater number of people than brain stimulation. The investigators' goals in the current study are to: repeat previous findings in a different group of participants and investigate the neural mechanisms that produce brain and behavioral facilitation in order to inform development of this approach for clinical implementation.
Read the detailed description
The long-term goal is to restore upper extremity (UE) motor function following stroke. The overall objective of this proposal is to improve the investigators' understanding of neural mechanisms contributing to inter-limb and inter-hemispheric transfer following non-paretic limb exercise to task failure. The investigators will use transcranial magnetic stimulation to probe acute adaptations in cortical excitability, intracortical and inter-hemispheric circuits that accompany behavioral facilitation of the paretic hand.
The work proposed in this two year project will enable the investigators to obtain three data elements critical to complete the working hypothesis:
- . Changes in intracortical and interhemispheric inhibition in both hemispheres following non-paretic limb exercise to task-failure.
- . Behavioral effects using a motor task involving manipulation and dexterity.
- . Determine the persistence and consistency of neural and behavioral facilitation.
- Conditions
- Stroke
- Being tested
- submaximal exercise (grip)
- Keywords
- hemiparesis
- Medical subject headings
- Stroke, Paresis
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
submaximal exercise (grip)Other
participants perform repeated gripping with visual feedback to task failure
| Study group | Role | What they receive |
|---|---|---|
| Task-failure, Extended Session | Experimental | Repeated sub-maximal gripping exercise with the less affected hand to task-failure - followed by repeated measurements (5) during recovery period Receives: Other: submaximal exercise (grip) |
What is being measured
The primary outcome is the main question the study is designed to answer.
Short Intracortical Inhibition (SICI)
SICI is a neurophysiologic measure of intra-cortical inhibition, obtained using transcranial magnetic stimulation (TMS) measured here in the ipsilesional hemisphere (IH) at each point to determine how it is modulated in response to task-failure. SICI is quantified as a ratio where values <1 reflect inhibition and >1 disinhibition or relative excitation. In health, SICI is ~0.5. Thus if SICI = 0.8, while <1 it would indicate less inhibition than expected in health. Transient change in SICI from 0.8 to 1.1 over the course of this experimental paradigm would reflect a period of relative excitation in response to the exercise paradigm.
Measured: baseline, post task-failure (minutes to an hour), every 45 min up to 3.5 hours post-task-failure (7 points total)
SICI Ratio
SICI is a neurophysiologic measure of intra-cortical inhibition, obtained using transcranial magnetic stimulation (TMS) measured here in the ipsilesional hemisphere (IH) at each point to determine how it is modulated in response to task-failure. SICI is quantified as a ratio where values <1 reflect inhibition and >1 disinhibition or relative excitation. In health, SICI is ~0.5. Thus if SICI = 0.8, while <1 it would indicate less inhibition than expected in health. Transient change in SICI from 0.8 to 1.1 over the course of this experimental paradigm would reflect a period of relative excitation in response to the exercise paradigm.
Measured: Baseline, pre-exercise of 8 repeated sessions
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted21 Jun 2017
- Study start1 Feb 2016
- Primary completion21 May 2018
- Study completion21 May 2018
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Posted resultsParticipant flow, outcome measures and adverse events reported by the sponsor.
- Other trials for StrokeStudies of the same condition, open and under way.
- More trials run by VA Office of Research and DevelopmentThe sponsor's other registered studies.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Interventional
- Phase
- Phase N/A
- Primary purpose
- Basic science
- Allocation
- Not applicable
- Intervention model
- Single group
- Model description
- Prospective, repeated measures
- Masking
- None (open label)
- Enrolment
- 15 participants (actual)
Sponsor and investigators
- Lead sponsor
- VA Office of Research and Development
- Sponsor type
- US federal agency
- Responsible party
- Sponsor
- Investigators
- Carolynn Patten, PhD, Principal investigator, North Florida/South Georgia Veterans Health System, Gainesville, FL
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT03194464
- Sponsor's protocol ID
- N1759-P
- Status last verified
- Jun 2020
- First submitted
- 14 Oct 2016
- Last updated
- 4 Jun 2020
- Results posted
- Yes, on ClinicalTrials.gov
- Data monitoring committee
- No
- FDA-regulated drug
- No
- FDA-regulated device
- No
- Individual data sharing
- No
Study at a glance
From the registry record, last updated by the sponsor on 4 Jun 2020. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Neural Mechanisms Mediating Interlimb Transfer Following Stroke
- ClinicalTrials.gov ID
- NCT03194464
- Acronym / sponsor ID
- N1759-P
- Conditions
- Stroke
- Keywords
- hemiparesis
- Study type
- Interventional
- Recruitment status
- Completed
- Enrolment
- 15 participants (actual)
- Lead sponsor
- VA Office of Research and DevelopmentUS federal agency
- Study start
- 1 Feb 2016 (actual)
- Primary completion
- 21 May 2018 (actual)
- Study completion
- 21 May 2018 (actual)
- First posted
- 21 Jun 2017 (actual)
- Results
- Posted 4 Jun 2020
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
This study investigates the effects of sub-maximal exercise to task-failure (e.g., fatigue) with the less involved, or so-called non-paretic hand, in people who have experienced a stroke. In previous work the investigators found that non-paretic hand exercise to task-failure increased excitability of the motor cortex in the more involved hemisphere and produced behavioral improvements in the unexercised paretic hand. Importantly, the magnitude of increased brain excitability is greater than what has been observed following brain stimulation with either repetitive transcranial magnetic stimulation (TMS) or transcranial direct current stimulation (tDCS) and lasts longer. This approach could be implemented in the clinical setting and could be accessible to a greater number of people than brain stimulation. The investigators' goals in the current study are to: repeat previous findings in a different group of participants and investigate the neural mechanisms that produce brain and behavioral facilitation in order to inform development of this approach for clinical implementation.
Detailed description
The long-term goal is to restore upper extremity (UE) motor function following stroke. The overall objective of this proposal is to improve the investigators' understanding of neural mechanisms contributing to inter-limb and inter-hemispheric transfer following non-paretic limb exercise to task failure. The investigators will use transcranial magnetic stimulation to probe acute adaptations in cortical excitability, intracortical and inter-hemispheric circuits that accompany behavioral facilitation of the paretic hand.
The work proposed in this two year project will enable the investigators to obtain three data elements critical to complete the working hypothesis:
- . Changes in intracortical and interhemispheric inhibition in both hemispheres following non-paretic limb exercise to task-failure.
- . Behavioral effects using a motor task involving manipulation and dexterity.
- . Determine the persistence and consistency of neural and behavioral facilitation.
Study design
- Primary purpose
- Basic science
- Allocation
- Not applicable
- Intervention model
- Single group
- Masking
- None (open label)
- Number of arms
- 1
- Model description
- Prospective, repeated measures
| Arm | Type | Receives |
|---|---|---|
| Task-failure, Extended Session | Experimental | Other: submaximal exercise (grip)Repeated sub-maximal gripping exercise with the less affected hand to task-failure - followed by repeated measurements (5) during recovery period |
Who may qualify
- Ages
- 18 years and older
- Sex
- All
- Healthy volunteers
- Not accepted
- Age groups
- Adult, Older adult
Key inclusion criteria (2 listed)
- individuals at least 6 months post-stroke in the cortical or sub-cortical distribution with residual upper-extremity hemiparesis
- Non-Veteran Participants are eligible
Key exclusion criteria (7 listed)
- multiple strokes
- strokes in both hemispheres
- brainstem/medullary/cerebellar stroke
- seizure disorder
- metal implants in head or neck
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Interventions
| Intervention | Type | Arms |
|---|---|---|
| submaximal exercise (grip)participants perform repeated gripping with visual feedback to task failure | Other | Task-failure, Extended Session |
Primary outcome
Short Intracortical Inhibition (SICI)
Time frame: baseline, post task-failure (minutes to an hour), every 45 min up to 3.5 hours post-task-failure (7 points total)
SICI is a neurophysiologic measure of intra-cortical inhibition, obtained using transcranial magnetic stimulation (TMS) measured here in the ipsilesional hemisphere (IH) at each point to determine how it is modulated in response to task-failure. SICI is quantified as a ratio where values <1 reflect inhibition and >1 disinhibition or relative excitation. In health, SICI is ~0.5. Thus if SICI = 0.8, while <1 it would indicate less inhibition than expected in health. Transient change in SICI from 0.8 to 1.1 over the course of this experimental paradigm would reflect a period of relative excitation in response to the exercise paradigm.
SICI Ratio
Time frame: Baseline, pre-exercise of 8 repeated sessions
SICI is a neurophysiologic measure of intra-cortical inhibition, obtained using transcranial magnetic stimulation (TMS) measured here in the ipsilesional hemisphere (IH) at each point to determine how it is modulated in response to task-failure. SICI is quantified as a ratio where values <1 reflect inhibition and >1 disinhibition or relative excitation. In health, SICI is ~0.5. Thus if SICI = 0.8, while <1 it would indicate less inhibition than expected in health. Transient change in SICI from 0.8 to 1.1 over the course of this experimental paradigm would reflect a period of relative excitation in response to the exercise paradigm.
Results and safety
Loading the posted results from ClinicalTrials.gov…
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 4 Jun 2020.
- Posted resultsParticipant flow, baseline, all outcome measures and adverse events.
- Individual participant dataSharing planned: No
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Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part. This study is not recruiting at the moment.
Carolynn Patten, PhD principal investigator
North Florida/South Georgia Veterans Health System, Gainesville, FL
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
A study testing submaximal exercise (grip) in people with Stroke, run by VA Office of Research and Development at 1 site in United States.
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
The sponsor lists 2 inclusion and 7 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: finished, as of the sponsor's last update on 4 Jun 2020. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 1 site in United States. Whether a site is taking part right now should be confirmed with that site. See every site.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
Are results available for this study?
Yes. Results are posted in the registry (first posted 4 Jun 2020). A summary is in the For doctors view, and the full results are on ClinicalTrials.gov.
How can a doctor refer a patient or contact the research team?
The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
Short Intracortical Inhibition (SICI) (time frame: baseline, post task-failure (minutes to an hour), every 45 min up to 3.5 hours post-task-failure (7 points total)). The study lists 2 primary outcomes in all. It is what the study was designed to measure, not a finding.
Where can I read the original study information?
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 4 Jun 2020.