Reliability of Paired Associative Stimulation-induced Neuroplasticity After Stroke (PASS)
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|ClinicalTrials.gov Identifier: NCT03861806|
Recruitment Status : Recruiting
First Posted : March 4, 2019
Last Update Posted : March 4, 2019
|Condition or disease||Intervention/treatment||Phase|
|Stroke||Behavioral: PAS true Behavioral: PAS sham||Not Applicable|
One of the assumptions in stroke rehabilitation is that motor training will lead to motor re-learning and persistent improvements through mechanisms involving neuroplasticity, defined as the ability of the brain to change its structure and function in response to injury, activity, or change in environment. A way to measure a patient's capacity for neuroplasticity may be useful in guiding selection of patients for rehabilitative interventions, or to assess the effect of pharmacological agents on neuroplasticity which may aid in augmenting motor recovery. One method to assess neuroplasticity non-invasively in humans through the use of paired associative stimulation (PAS). PAS is a form of non-invasive stimulation that modulates corticospinal excitability through mechanisms related to long-term potentiation (LTP) and long-term depression (LTD). In PAS, repetitive pairing of peripheral nerve stimulation with a transcranial magnetic stimulation (TMS) pulse over the contralateral motor cortex will increase or decrease corticospinal excitability, depending on the timing between the two stimuli. In healthy subjects and patients with stroke, PAS has successfully been used to facilitate corticospinal excitability as a means to enhance motor performance. In this study, we plan to use PAS as an assay of corticospinal plasticity rather than as a therapeutic intervention in patients with chronic motor deficits (>6 months) due to ischemic stroke.
There is large interindividual variability in individuals' responses to PAS, which may be useful in examining its relationship to motor learning, but the reliability of the measure will need to be assessed prior to using this measure to make inferences about a subject's general capacity to learn motor tasks. The reliability of the response to PAS and its relationship to clinical factors such as stroke severity, has not been well studied in patients with stroke. Results from a preliminary experiment suggest that stroke patients who have a robust response to facilitatory PAS on their unaffected hemisphere have more severe motor deficits than those who do not have a significant response to PAS.
|Study Type :||Interventional (Clinical Trial)|
|Estimated Enrollment :||32 participants|
|Intervention Model:||Parallel Assignment|
|Intervention Model Description:||We plan a randomized crossover study of sham and true PAS.|
|Masking:||Triple (Participant, Investigator, Outcomes Assessor)|
|Official Title:||Reliability of Paired Associative Stimulation-induced Neuroplasticity After Stroke|
|Estimated Study Start Date :||March 2019|
|Estimated Primary Completion Date :||February 2022|
|Estimated Study Completion Date :||February 2022|
Experimental: PAS true
Participants will receive paired associative stimulation therapy with a modulatory inter-stimulus interval.
Behavioral: PAS true
Participants will receive paired associative stimulation (transcranial magnetic stimulation and peripheral nerve stimulation) with an inter-stimulus interval length known to modulate corticospinal excitability.
Sham Comparator: PAS sham
Participants will receive paired associative stimulation therapy with a non modulatory inter-stimulus interval.
Behavioral: PAS sham
Participants will receive paired associative stimulation (transcranial magnetic stimulation and peripheral nerve stimulation) with an inter-stimulus interval length known to not modulate corticospinal excitability.
- Change in motor evoked potential amplitude [ Time Frame: Baseline, up to 30 min Post PAS ]Assessment of corticospinal excitability
Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT03861806
|Contact: Tomoko Kitago, M.D.||914-368-3169 ext +email@example.com|
|Contact: Stuart W Mackenzie, PhD.||914-368-3179 ext +firstname.lastname@example.org|
|United States, New York|
|Burke Neurological Institute||Recruiting|
|White Plains, New York, United States, 10605|
|Contact: Tomoko Kitago, M.D 914-368-3169 ext +1 email@example.com|
|Contact: Stuart W Mackenzie, PhD. 914-368-3179 ext +1 firstname.lastname@example.org|