Can zapping the Brain's diaphragm center help COPD breathing?
NCT ID NCT07831629
First seen Sep 21, 2026 · Last updated Sep 21, 2026
Summary
Researchers are testing whether high-definition transcranial direct current stimulation (HD-tDCS) changes brain blood flow and breathing muscle strength in adults with chronic obstructive pulmonary disease (COPD). Twenty participants receive three 20-minute sessions of brain stimulation, each with a different electrical polarity or a placebo. The team measures brain oxygen levels with near-infrared spectroscopy and checks breathing muscle strength before, during, and after stimulation. The goal is to understand how this brain stimulation affects the brain and breathing, not to prove it treats COPD.
What this could mean
Our plain-language read of the trial. This is informational only, not medical advice or a prediction.
- Active substance
- high-definition transcranial direct current stimulation (HD-tDCS), a non-invasive brain stimulation technique
- What this could lead to
- If it works, this could point toward a non-drug way to support breathing muscles in people with COPD by targeting the brain region that controls the diaphragm.
- What could go wrong
- This is a small pilot study of 20 people testing immediate brain and breathing responses, not long-term benefit. The stimulation may produce no meaningful change, and results in this selected group may not apply to all people with COPD.
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Study facts
What this study's own registry entry says, in plain language.
- Phase
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Not a phased trial
Phase numbers describe drug development. The registry uses this when they do not apply, as it does for trials of devices, procedures or behaviour changes, and for observational studies.
- Participants
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20 people
The number who actually took part.
- Started
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Oct 2023
- Finished
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Apr 2024
- Lead sponsor
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Other sponsor
The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.
Who can take part
This study's own entry requirements. Only the study team can say for certain whether you qualify.
- Ages
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18 to 80 years
- Sex
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Anyone
- Healthy volunteers
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Not accepted
This study is not open to healthy volunteers. The entry requirements below say who it is open to.
Show the full entry requirements Hide the full entry requirements
Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.
Inclusion Criteria: * Age over 18 years old; * Airflow limitation mild to severe (GOLD 1-3); * No contraindications for HD-tDCS, such as pregnancy, metal implants in the head, cochlear implants and pacemaker; * Absence of concomitant diseases of the central or peripheral nervous system. Exclusion Criteria: * Refusal to sign the TCLE; * Missing two consecutive or three alternate sessions during treatment; * Develop any disabling condition that prevents continued participation in the study.
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Conditions
The condition(s) this trial relates to.
As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.
Contacts and locations
Locations
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Aging and Neuroscience Studies Laboratory
João Pessoa, Brazil
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