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Brain scans reveal how deaf adults hear with two cochlear implants

NCT ID NCT02904187

Knowledge-focused Sponsor: Hospices Civils de Lyon Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now
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 This study
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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 Jun 27, 2026

Summary

This study looked at how the brain processes sound in 43 deaf adults who have two cochlear implants. Researchers compared their brain activity to people with normal hearing using PET or EEG scans. The goal was to understand if the timing between activating the two implants affects how the brain handles sound information.

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

43 people

The number who actually took part.

Started

Mar 2010

Finished

Mar 2016

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

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 for patients: \- profoundly deaf patients with bilateral cochlear implants Exclusion criteria for patients: * post-operative complications * incomplete surgical insertion of one of the cochlear implant * age under 18 years * non-compliant patient * pregnant woman or woman with no efficient contraception method * informed consent not signed * no health insurance Inclusion criteria for control \- normal hearing subjects Exclusion criteria control * normal hearing subject * subject under 18 years old * unilateral or bilateral hearing loss * non-compliant subject * pregnant woman or woman with no efficient contraception method * informed consent not signed * no health insurance

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Conditions

The condition(s) this trial relates to.

Deafness hearing loss disorder

As listed by the trial registrant

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

Deafness

Contacts and locations

Locations

  • Département d'ORL, Hôpital Edouard Herriot

    Lyon, 69437, France

More trials for these conditions

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