Investigating LFP Correlates of TUS in Patients With Movement Disorders (TUS-LFP)
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ClinicalTrials.gov Identifier: NCT05965960 |
Recruitment Status :
Recruiting
First Posted : July 28, 2023
Last Update Posted : October 10, 2023
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Tracking Information | |||||||||
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First Submitted Date ICMJE | June 7, 2023 | ||||||||
First Posted Date ICMJE | July 28, 2023 | ||||||||
Last Update Posted Date | October 10, 2023 | ||||||||
Actual Study Start Date ICMJE | May 18, 2023 | ||||||||
Estimated Primary Completion Date | June 1, 2024 (Final data collection date for primary outcome measure) | ||||||||
Current Primary Outcome Measures ICMJE |
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Original Primary Outcome Measures ICMJE | Same as current | ||||||||
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Current Secondary Outcome Measures ICMJE |
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Original Secondary Outcome Measures ICMJE | Same as current | ||||||||
Current Other Pre-specified Outcome Measures | Not Provided | ||||||||
Original Other Pre-specified Outcome Measures | Not Provided | ||||||||
Descriptive Information | |||||||||
Brief Title ICMJE | Investigating LFP Correlates of TUS in Patients With Movement Disorders | ||||||||
Official Title ICMJE | Investigating Local Field Potential Correlates of Transcranial Ultrasound Stimulation in Patients With Movement Disorders | ||||||||
Brief Summary | Transcranial Ultrasound Stimulation (TUS) is an emerging non-invasive brain stimulation(NIBS) technique that can be used on both superficial and deep brain targets with a high spatial resolution as small as a few cubic millimeters. Neural correlates of TUS have yet been elucidated. To date, no intracranial recordings (i.e., local field potential [LFP]) have been captured during or after TUS in patients with movement disorders. In this study, we are aiming to profile basal ganglia LFP activity during and after TUS by using a DBS system that is capable of recording LFP. This can shed light on mechanisms of TUS, as well as allow identification of a neurophysiological biomarker that can be used to tune the TUS sonication parameters for future clinical trials. | ||||||||
Detailed Description | Experiment 1: Subjects will be randomly assigned to either the sham or active stimulation group during the first study visit. In the second study visit, there will be a crossover between the groups, with all subjects undergoing one sham and one active stimulation visit before the study is completed. During the active stimulation visit, a theta burst protocol (Isppa: 30 W/cm2, burst length: 20 ms, period: 200 ms, frequency 500 kHz) will be used to sonicate the bilateral primary motor cortices (M1) or globus pallidus interna (GPi) for 2 minutes. The sham group involves sonications performed with the power set to 0 watts over bilateral M1s/GPis. In both groups, the subjects will be masked using white noise transmitted through earbuds. The targets will be identified anatomically using structural MRIs and a neuronavigation system. The Percept PC DBS system will be used to record local field potentials (LFPs) from the subthalamic nucleus (STN) or globus pallidus internus (GPI) at various time points: before (baseline) and during the sonications, as well as at 10-, 30-, and 45-minute intervals after the sonications. These recordings will be obtained while the subjects engage in a finger tapping task monitored by an accelerometer, as well as during resting periods. The power of LFPs across different frequencies will be compared and correlated with the velocity observed during the finger tapping task. Following the completion of sham and active stimulation visits, the subjects will have the opportunity to participate in an optional control group visit, which entails sonication of the occipital cortex utilizing the theta burst protocol. Experiment 2: TUS will be utilized to target the area directly over the DBS lead, while concurrently recording LFPs to identify any stimulation artifact indicative of target area-sonication engagement. |
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Study Type ICMJE | Interventional | ||||||||
Study Phase ICMJE | Not Applicable | ||||||||
Study Design ICMJE | Allocation: Randomized Intervention Model: Crossover Assignment Masking: Double (Participant, Outcomes Assessor) Masking Description: The subject will be blind to stimulation condition (sham/active TUS). The assessor will be blind to stimulation condition (sham/active TUS) while analyzing LFPs. The UPDRS examination will be video-recorded and blindly assessed by a research team member. Primary Purpose: Basic Science
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Condition ICMJE |
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Intervention ICMJE |
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Study Arms ICMJE |
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Publications * | Not Provided | ||||||||
* Includes publications given by the data provider as well as publications identified by ClinicalTrials.gov Identifier (NCT Number) in Medline. |
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Recruitment Information | |||||||||
Recruitment Status ICMJE | Recruiting | ||||||||
Estimated Enrollment ICMJE |
25 | ||||||||
Original Estimated Enrollment ICMJE | Same as current | ||||||||
Estimated Study Completion Date ICMJE | June 1, 2024 | ||||||||
Estimated Primary Completion Date | June 1, 2024 (Final data collection date for primary outcome measure) | ||||||||
Eligibility Criteria ICMJE | Inclusion Criteria:
Exclusion Criteria:
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Sex/Gender ICMJE |
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Ages ICMJE | 18 Years and older (Adult, Older Adult) | ||||||||
Accepts Healthy Volunteers ICMJE | No | ||||||||
Contacts ICMJE |
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Listed Location Countries ICMJE | Canada | ||||||||
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Administrative Information | |||||||||
NCT Number ICMJE | NCT05965960 | ||||||||
Other Study ID Numbers ICMJE | 20-5740#2 | ||||||||
Has Data Monitoring Committee | No | ||||||||
U.S. FDA-regulated Product |
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IPD Sharing Statement ICMJE |
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Current Responsible Party | University Health Network, Toronto | ||||||||
Original Responsible Party | Robert Chen, University Health Network, Toronto, Senior Scientist | ||||||||
Current Study Sponsor ICMJE | University Health Network, Toronto | ||||||||
Original Study Sponsor ICMJE | Same as current | ||||||||
Collaborators ICMJE | Not Provided | ||||||||
Investigators ICMJE |
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PRS Account | University Health Network, Toronto | ||||||||
Verification Date | July 2023 | ||||||||
ICMJE Data element required by the International Committee of Medical Journal Editors and the World Health Organization ICTRP |