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Scientists zap brains to unlock secrets of vision

NCT ID NCT01617408

Knowledge-focused Sponsor: National Institute of Mental Health (NIMH) 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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 27, 2026 · Last updated Jul 17, 2026 · Updated 5 times

Summary

This study aims to understand how the brain processes what we see, like faces, tools, and scenes. Healthy volunteers aged 18-50 will perform visual tasks while having brain scans (MRI) and receiving mild brain stimulation (TMS or tES). The goal is to map which brain areas handle different aspects of vision, not to test a treatment.

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.

Participants

About 665 people

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

Started

Mar 2013

Lead sponsor

A government research agency

The lead sponsor is the US National Institutes of Health.

Who can take part

This study's own entry requirements. Only the study team can say for certain whether you qualify.

Who is studied

Neurologically normal subjects aged between 18 and 50 years old.

Ages

18 to 50 years

Sex

Anyone

Healthy volunteers

Accepted

You do not need to have the condition being studied to take part.

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: Healthy Ages 18-50 years (inclusive) Able to read and write in English to guarantee understanding of all written and spoken instructions, which are in English EXCLUSION CRITERIA: Individuals with conditions that could pose a risk relating to the safety of the MRI procedure, the TMS procedure or the combined TBS and fMRI procedure will be excluded from the protocol such as: * Those with ferromagnetic metal in the cranial cavity or eye, e.g. aneurysm clip, implanted neural stimulator, cochlear implant, ocular foreign body. * Those with an abnormality on a structural MRI. * Those with an implanted cardiac pacemaker or auto-defibrillator * Those with an insulin pump. * Those with an irremovable body piercing * Pregnant women * Those with a visual impairment that will prevent them from performing the task * Those without consent capacity will not be enrolled * Those who do not understand the study instructions * Those with a history of neurological problems. Neurological problems include, but are not limited to; family history of epilepsy, history of seizures and recurrent migraines. * Those using medicines that can lower the seizure threshold. These can include but are not limited to; imipramine, amitriptyline, doxepine, nortriptyline, maprotiline, chlorpromazine, clozapine, foscarnet, ganciclovir, ritonavir, amphetamines. * Those with a visual impairment that will prevent them from performing the task * Those who have a significant psychiatric illness or have a history of psychiatric illness. * NIMH staff/employees/family members

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As listed by the trial registrant

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

Dorsal pathway FMRI Ventral pathway

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

  • National Institutes of Health Clinical Center

    RECRUITING

    Bethesda, Maryland, 20892, United States

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