- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT03974087
The Effect of Transcranial Direct Current Stimulation on Visual Attention in Mild Cognitive Impairment
March 14, 2023 updated by: Masaryk University
The Effect of Transcranial Direct Current Stimulation on Visual Attention in Mild Cognitive Impairment - a Combined MRI and Non-invasive Brain Stimulation Study
Progressively causes the breakdown of cognitive functions and impairs quality of life for patients and their caregivers.
In addition to memory impairment, visual attention is also compromised, even at the stage of mild cognitive impairment due to AD (MCI-AD).
No treatment has been found for MCI-AD; therefore, attention has been drawn to non-invasive brain stimulation techniques, such as transcranial direct current stimulation (tDCS), in order to enhance cognitive functions by modifying brain plasticity.
In the current research, investigator aim to examine the long-term effects of the optimal multiple-session tDCS protocol in MCI-AD on visual attention including the transfer to an ecologically valid virtual environment and identify the neural underpinnings of tDCS-induced behavioral aftereffects using a combined tDCS/ MRI network-based approach.
Study Overview
Status
Completed
Conditions
Intervention / Treatment
Detailed Description
Investigator will investigate the long-term effects of 10 active tDCS consecutive sessions using an optimized stimulation protocol as compared to a placebo stimulation on visual attention in the MCI-AD.
A two-parallel-group, randomized, placebo-controlled design will be used.
In addition, the cognitive transfer of tDCS will be evaluated.
Repeated tDCS sessions will be performed in 10 consecutive sessions (2 weeks: Monday to Friday) over one preselected ROI together with ongoing visual attention training.
During the stimulation, investigator will use the visual matching task.
Before the repeated stimulation sessions, participants will undergo the neurocognitive examination.
Behavioral examinations of the trained and untrained tasks (i.e. the transfer tasks) will be performed to assess the baseline performance.
MRI protocol consisting of T1, T2, FLAIR, and fMRI during the task performance (visual matching task), resting state fMRI, and DTI sequences will be acquired before and after the whole 10-day stimulation protocol in order to search for active vs. placebo tDCS-induced changes in brain activation and resting state functional and structural connectivity and to identify neural correlates of behavioral changes.
Behavioral assessment of the trained task and the transfer task will be repeated immediately after and again at a one-month follow-up visit after the end of the last stimulation session
Study Type
Interventional
Enrollment (Actual)
35
Phase
- Not Applicable
Contacts and Locations
This section provides the contact details for those conducting the study, and information on where this study is being conducted.
Study Locations
-
-
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Brno, Czechia, 61300
- Ceitec, Masaryk University
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Participation Criteria
Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.
Eligibility Criteria
Ages Eligible for Study
60 years to 85 years (Adult, Older Adult)
Accepts Healthy Volunteers
No
Genders Eligible for Study
All
Description
Inclusion Criteria:
- amnestic single or multi-domain mild cognitive impairment patients in accordance with diagnostic criteria (Albert et al., 2011)
Exclusion Criteria:
- psychiatric disorders, including major depression, major vascular lesions, and other brain pathologies detected by MRI that might present with cognitive decline
- a cardio pacemaker or any MRI-incompatible metal in the body
- epilepsy
- any diagnosed psychiatric disorder
- alcohol/drug abuse
- lack of cooperation
- presence of dementia.
Study Plan
This section provides details of the study plan, including how the study is designed and what the study is measuring.
How is the study designed?
Design Details
- Primary Purpose: Supportive Care
- Allocation: Randomized
- Interventional Model: Parallel Assignment
- Masking: Triple
Arms and Interventions
Participant Group / Arm |
Intervention / Treatment |
---|---|
Active Comparator: MCI patients with real transcranial direct current stimulation
Patients will receive 2mA stimulation in 10 consecutive sessions.
|
2mA stimulation for 20 minutes
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Sham Comparator: MCI patients with sham transcranial direct current stimulation
Patients will receive sham stimulation in 10 consecutive sessions.
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2mA stimulation for 20 minutes
|
What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Visual-attention task accuracy
Time Frame: Change from baseline immediately after completion of stimulation protocol and one month after completion of stimulation protocol
|
Task will be presented on a computer and subject will respond by YES-NO buttons.
Only if there are no differences in task accuracy, we will measure task reaction times (e.g.
due to the roof effect).
|
Change from baseline immediately after completion of stimulation protocol and one month after completion of stimulation protocol
|
Secondary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Psychological assessment - z-score computed from multiple psychological domains
Time Frame: Change from baseline immediately after one month from completion of stimulation protocol
|
Z-scores based on neuropsychological assessment (lasting up to 40 min) evaluating (global cognitive functions, memory, attention, psychomotor functions, executive functions, visuospatial functions, language, depressive symptoms, and activities of daily living) Only if there are no changes in z-score, we will asses change on a level of individual tests.
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Change from baseline immediately after one month from completion of stimulation protocol
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Magnetic resonance imaging
Time Frame: Change from baseline immediately after completion of stimulation protocol and one month after completion of stimulation protocol
|
Investigator will record high resolution structural T1-weighted (MPRAGE) images, functional T2* weighted multiband EPI sequences, and DTI measurement.
The total time spent in the scanner will be approximately 60 min
|
Change from baseline immediately after completion of stimulation protocol and one month after completion of stimulation protocol
|
Other Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Memory task in virtual reality performance - the accuracy
Time Frame: Change from baseline immediately after completion of stimulation protocol and one month after completion of stimulation protocol
|
Change from baseline immediately after completion of stimulation protocol and one month after completion of stimulation protocol
|
|
Memory task in virtual reality performance - The time to accomplish different difficulty levels
Time Frame: Change from baseline immediately after completion of stimulation protocol and one month after completion of stimulation protocol
|
Change from baseline immediately after completion of stimulation protocol and one month after completion of stimulation protocol
|
|
Memory task in virtual reality performance - The trajectories needed for completion of different difficulty levels
Time Frame: Change from baseline immediately after completion of stimulation protocol and one month after completion of stimulation protocol
|
Change from baseline immediately after completion of stimulation protocol and one month after completion of stimulation protocol
|
|
Visual working memory task accuracy
Time Frame: Change from baseline immediately after completion of stimulation protocol and one month after completion of stimulation protocol
|
Task will be presented on a computer and subject will respond by YES-NO buttons.
Only if there are no differences in task accuracy, we will measure task reaction times (e.g.
due to the roof effect).
|
Change from baseline immediately after completion of stimulation protocol and one month after completion of stimulation protocol
|
Collaborators and Investigators
This is where you will find people and organizations involved with this study.
Sponsor
Collaborators
Investigators
- Principal Investigator: Lubomira Anderková, PhD, Ceitec, Masaryk University
Study record dates
These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.
Study Major Dates
Study Start (Actual)
February 19, 2020
Primary Completion (Actual)
October 30, 2022
Study Completion (Actual)
December 30, 2022
Study Registration Dates
First Submitted
May 10, 2019
First Submitted That Met QC Criteria
June 3, 2019
First Posted (Actual)
June 4, 2019
Study Record Updates
Last Update Posted (Actual)
March 15, 2023
Last Update Submitted That Met QC Criteria
March 14, 2023
Last Verified
September 1, 2021
More Information
Terms related to this study
Additional Relevant MeSH Terms
Other Study ID Numbers
- NV18-04-00256
Drug and device information, study documents
Studies a U.S. FDA-regulated drug product
No
Studies a U.S. FDA-regulated device product
No
product manufactured in and exported from the U.S.
No
This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.
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