Study Results
The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.
Basic Information
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RECRUITING
NA
30 participants
INTERVENTIONAL
2025-07-17
2028-06-30
Brief Summary
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Detailed Description
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Conditions
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Study Design
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RANDOMIZED
CROSSOVER
2. Washout Period: A minimum 1-week washout period (typically around 2 weeks) is included to minimize potential carry-over effects.
3. Final 2-Day Sessions: Participants complete the alternate stimulation condition (sham or real) paired with perceptual learning-based training.
TREATMENT
DOUBLE
Study Groups
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tRNS with perceptual learning-based training
Each 2-day session consists of up to three 18-minute transcranial random noise stimulation (tRNS) paired with perceptual learning-based training.
transcranial random noise stimulation (tRNS)
Stimulation location: bilateral human middle temporal complex (hMT+). Stimulation parameters: 1 mA current intensity, with a frequency range of 101-640 Hz.
Perceptual learning-based training
A motion discrimination task, judging the global direction of moving dot stimuli with two different coherence levels.
Sham with perceptual learning-based training
Each 2-day session consists of up to three 18-minute sham stimulation paired with perceptual learning-based training.
Sham Stimulation
Stimulation location: bilateral human middle temporal complex (hMT+). Stimulation parameters: Ramp up stimulation at 1mA with a frequency range of 101-640Hz for the first 30 seconds followed by no current for the remainder of the duration.
Perceptual learning-based training
A motion discrimination task, judging the global direction of moving dot stimuli with two different coherence levels.
Interventions
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transcranial random noise stimulation (tRNS)
Stimulation location: bilateral human middle temporal complex (hMT+). Stimulation parameters: 1 mA current intensity, with a frequency range of 101-640 Hz.
Sham Stimulation
Stimulation location: bilateral human middle temporal complex (hMT+). Stimulation parameters: Ramp up stimulation at 1mA with a frequency range of 101-640Hz for the first 30 seconds followed by no current for the remainder of the duration.
Perceptual learning-based training
A motion discrimination task, judging the global direction of moving dot stimuli with two different coherence levels.
Eligibility Criteria
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Inclusion Criteria
2. Capable of providing informed consent and complying with study procedures.
3. Unilateral or bilateral focal brain damage causing loss of vision.
4. At least three months post-stroke or traumatic brain injury, or a stable brain tumor within the past year.
1. At least 18 years of age.
2. Capable of providing informed consent and complying with study procedures.
Exclusion Criteria
2. Severe mental health challenges that could interfere with study results, or current or recent (within the past 6 months) drug or alcohol abuse or addiction as defined by DSM-5.
3. Vision loss resulting from ocular disease or disorder.
B. Healthy volunteers (age-matched controls):
1. Any CNS diseases or psychiatric disorders (e.g., epilepsy, schizophrenia) that would interfere with study results.
2. Previous head injury.
3. Present or past (within past 6 months) drug or alcohol abuse or addiction based on DSM-5.
18 Years
ALL
No
Sponsors
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Georgetown University
OTHER
Responsible Party
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Locations
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Georgetown University Medical Center
Washington D.C., District of Columbia, United States
Countries
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Central Contacts
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Facility Contacts
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Other Identifiers
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STUDY00008292
Identifier Type: -
Identifier Source: org_study_id
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