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Home brain zapper tested for cancer fog

NCT ID NCT07112521

Symptom relief Sponsor: University of Helsinki Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now This study
This trial is taking on new participants right now.
Not yet recruiting
Registered, but not yet taking participants.
By invitation only
Not open to general applications. Only people the study team invites can take part.
Paused
Paused for now. It may or may not start again.
Ongoing
Running, but no longer taking on new participants.
Completed
The trial has finished. Results may not be published yet.
Stopped early
Stopped early, before it reached the end. That can be for many reasons, including safety.
Cancelled
Cancelled before anyone took part.

Expanded access (not trials)

Expanded access
Not a trial. This treatment can be requested outside a study, case by case, for people who qualify.
Expanded access (paused)
Not a trial. The treatment can normally be requested outside a study, but is unavailable right now.
Expanded access (ended)
Not a trial. The treatment could once be requested outside a study, but no longer can.
Approved
The treatment has been approved, so it is available normally rather than through this programme.

When the status isn't known

Details not published
The full record has not been published yet, so there is little to show here.
Status unknown
This status has not been confirmed recently, so it may be out of date.

First seen Jun 26, 2026 · Last updated Jun 26, 2026

Summary

This study tests whether a home-use device that sends a mild electrical current to the brain can help breast cancer survivors with memory and attention problems (often called 'chemo brain'). Forty women who finished cancer treatment will use either the active device or a sham version for six weeks. Researchers will also check if being overweight changes how well the treatment works.

What this could mean

Our plain-language read of the trial. This is informational only, not medical advice or a prediction.

Active substance
transcranial Direct Current Stimulation (tDCS) device
What this could lead to
If it works, this could offer a safe, at-home way to improve memory and attention in breast cancer survivors struggling with 'chemo brain'.
What could go wrong
This is a small early-stage trial (40 people) testing a mild brain stimulation technique. The effect may be small or no better than placebo, and results may not apply to all survivors.

This is an AI summary of the original study and may miss details. Read our disclaimer.

Study facts

What this study's own registry entry says, in plain language.

Phase

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

About 40 people

The number the study aims to enrol. It can still change while the study runs.

Expected to start

Sep 2025

An estimate. Start dates often move.

Expected to finish

Jan 2027

An estimate. End dates often move.

Lead sponsor

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

18 years and older

Sex

Female participants only

Healthy volunteers

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

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: * Female * Over 18 years old * Diagnosed with primary adult-onset breast cancer within the last 5 years * Completed all active cancer treatments at least 3 months prior to study participation * Capable of fulfilling study requirements, including having internet access. * Fluent in either Finnish or English * Have normal or corrected vision and hearing * Right-handed (based on the Edinburgh Handedness Inventory score; Oldfield, 1971) Exclusion Criteria: * Have received primary cancer treatment (chemotherapy, radiotherapy, immunotherapy, or surgery) within the last 3 months * Have a history of childhood-onset cancer * Present with acute eczema on the scalp * Diagnosed with dementia, Alzheimer's disease, multiple sclerosis, or - Parkinson's disease * Have experienced unconsciousness for more than five minutes due to a head/brain injury within the last 10 years * Have a history of stroke or transient ischemic attack * Suffer from claustrophobia * Are pregnant or breastfeeding * Have any of the following medical implants or devices: cardiac implantable electronic devices, metallic intraocular foreign bodies, neurostimulation systems, cochlear/ear implants, drug infusion pumps, catheters with metal components, metallic fragments (e.g., bullets), cerebral aneurysm clips, magnetic dental implants, tissue expanders, artificial limbs, non-removable piercings, or face tattoos. * Weight exceeding 250 kg (the MRI table weight limit) or they are unable to fit within the 70 cm diameter bore of the MRI machine

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Conditions

The condition(s) this trial relates to.

breast cancer Obesity obesity disorder Overweight

As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

Breast cancer survivor Obesity / overweight

How to take part

Only the study team decides who joins. These are the ways to reach them.

  1. The places running it

    1 site. The list below names each one and where it is.

  2. The official record

    ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.

    Open the record ↗

  3. A doctor treating you

    A doctor who knows your case can contact a study site on your behalf, and can tell you whether this study is worth pursuing at all.

Contacts and locations

Locations

  • Department of Psychology, Faculty of Medicine, University of Helsinki

    RECRUITING

    Helsinki, Uusimaa, 00200, Finland

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Other studies related to the condition(s) this trial covers.