ClinicalTrials.gg
Status unknownNCT03661034Updated Aug 24, 2021

Study of Tolerability, Safety and Efficacy of Sensory Stimulation at Multiple Dose Levels to Improve Brain Function (Etude Study)

An interventional study of GammaSense Stimulation System (non-invasive, non-significant risk) in Alzheimer Disease, Early Onset, Alzheimer Disease and Alzheimer Dementia, sponsored by Cognito Therapeutics, Inc.. Status unknown at 1 site in United States. Open to participants aged 50 Years and older. Per ClinicalTrials.gov, last updated 2021-08-24.

Sponsored by Cognito Therapeutics, Inc. · Not applicable, Interventional, and Treatment

The sponsor has not verified this record recently (last verified Aug 2021), so the status shown — last known as Active, not recruiting — may be out of date.

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Phase
Not applicable
Study type
Interventional
Enrollment
20
Allocation
Randomized
Ages
50 Years and older
Sex
All
01

Where this study stands

Counted across the records on this site · 2026-11-14

Among 1,939 studies in Alzheimer Disease with a site in United States — 345 open to participants now, 445 under way, 40 of them phase 3. Alzheimer Disease · United States.

Planned enrollment
1,278th of 1,608
20 · median 73
Started
2018
with 103 others
No phase
608 of 1,939
130 open now
Registered
980th of 1,939
by date

Among the 1,939 studies in Alzheimer Disease with a site in United States, this one is the 1,278th largest by planned enrollment of the 1,608 interventional ones that give a count, is one of 104 that started in 2018, is one of 608 with no phase, and was the 980th registered.

Alzheimer Disease

3,968 studies on the registry are indexed under Alzheimer Disease; 928 are open to participants now.

Browse Alzheimer Disease studies →

Open to participants now

345 of the 1,939 studies in Alzheimer Disease with a site in United States are open now. Recruiting first, the newest first:

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All 345 open studies →

A study can be open while its sites in United States have not opened yet or have stopped. Only those recruiting at a site in United States →

Who these studies take

Of the 643 Alzheimer Disease studies recruiting now, 284 (44%) set no upper age limit and 55 (9%) stop at 75 or younger; 34 take children under 18; 285 take healthy volunteers.

This study: 50 Years and older · all sexes · no healthy volunteers.

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02

Study summary

The Etude Study is a multi-center, four-arm prospective dose-adjusting study designed to assess the tolerability, safety and efficacy of non-invasive sensory stimulation for patients with cognitive impairment.

Read the detailed description

Subjects will be enrolled in two Cohorts (N=10 each, enrolled sequentially), and each will assess two different dose levels (randomly assigned). Based on initial outcomes in Cohort 1 at Interim Analysis, the doses for Cohort 2 will be escalated or decreased. Subjects will participate in 1 year (48 weeks) of daily therapy dose using the non-invasive, non-significant risk sensory stimulation medical device.

03

Conditions studied

  • Alzheimer Disease, Early Onset
  • Alzheimer Disease
  • Alzheimer Dementia
  • Mild Cognitive Impairment
  • Memory Disorders
  • Memory Loss
  • Memory Impairment
  • Memory Disorders, Age Related
  • Alzheimer Disease, Late Onset
  • Cognitive Impairment
  • Dementia, Mild
  • Dementia, Alzheimer Type
  • Cognitive Decline

Keywords

  • Dementia
  • Alzheimer's Disease
  • Memory Loss
04

Who can participate

Ages eligible
50 Years and older
Sexes eligible
All
Accepts healthy volunteers
No

Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.

Inclusion criteria

  • >= 50 Years Old
  • 24 - 30
  • Prodromal Alzheimer's Disease (AD), AD or Mild Cognitive Impairment (MCI) due to AD
  • Participation of a caregiver / care partner
  • Amyloid Positive PET Scan

Exclusion criteria

Exclusion Criteria:

  • Profound hearing or visual impairment
  • Seizure Disorder
  • Use of memantine (Namenda or Namzaric)
  • Implantable devices (non-MR compatible)
Terms in these criteria, in plain language(1)

Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.

MMSE and MoCA

Short tests of memory and thinking, each scored out of 30. Lower scores suggest more difficulty; criteria give a range, either to include people with memory problems or to leave them out.

05

Study design

Phase
Not applicable
Primary purpose
Treatment
Allocation
Randomized
Intervention model
Parallel assignment
Masking
None (open label)
Enrollment
20 participants (estimated)

Study arms

  • Experimental
    Cohort 1, Arm A

    Dosing 1 hour session per day with GammaSense Stimulation System (non-invasive, non-significant risk)

    Device: GammaSense Stimulation System (non-invasive, non-significant risk)

  • Experimental
    Cohort 1, Arm B

    Dosing 1 hour session twice per day with GammaSense Stimulation System (non-invasive, non-significant risk)

    Device: GammaSense Stimulation System (non-invasive, non-significant risk)

  • Experimental
    Cohort 2, Arm C

    Dosing 1 hour session every other day or one 2 hour session per day, depending on Interim Analysis outcomes with GammaSense Stimulation System (non-invasive, non-significant risk)

    Device: GammaSense Stimulation System (non-invasive, non-significant risk)

  • Experimental
    Cohort 2, Arm D

    Dosing 30 minute session twice per day or 120 minute session twice per day, depending on Interim Analysis outcomes with GammaSense Stimulation System (non-invasive, non-significant risk)

    Device: GammaSense Stimulation System (non-invasive, non-significant risk)

Interventions

  • DeviceGammaSense Stimulation System (non-invasive, non-significant risk)

    Non-invasive, non-significant risk audio-visual sensory stimulation device

    Also known as: FG-0003

06

What researchers measure

Primary outcomes

  1. Change in Amyloid Positron Emission Tomography (PET) Scan

    Movement of amyloid, as measured qualitatively and quantitatively in Amyloid PET Imaging at 0, 1.5, 3, 6, 9 and 12 months following assigned regimen of sensory stimulation treatment sessions

    Time frame: PET Imaging at Baseline, 6 weeks and every 3 months throughout therapy (0, 1.5, 3, 6, 9 and 12 month)

  2. Adverse Events

    Composite adverse events to be assessed at Interim Analysis (at any point in partial study completion), and final analysis (at 6 and 12 months time points).

    Time frame: Over 12 months

Secondary outcomes

  1. Alzheimer's Disease Assessment Scale- Cognitive Subscale (ADAS-Cog)

    A scale used to assess cognition; This scale consists of 14 questions assessed resulting in a score from 0 to 90, where a higher score indicates more cognitive disruption.

    Time frame: Baseline, 3, 6, 9 and 12 months

07

Study locations

1 site
  • Boston Center for Memory
    Newton, Massachusetts 02459, United States
08

References and documents

Individual participant data

Plan to share: No

No publications or documents are linked to this record.

09

Timeline

Tracking since Sep 25, 2026
ElapsedEstimatedEstimated, not yet reachedSimilar studies: half by the dot; the band is the middle halfHalf of similar studies reached it by the dot; the band is the middle half, from a quarter to three quarters

Ran from May 2018 to primary completion in May 2021, 35 months.

Of 77 industry-sponsored interventional studies with no phase under Alzheimer Disease, half reached primary completion within 18 months of starting (the median), counting those still running; a quarter within 11 and three quarters within 40. This study's 35 months is above that.

Counting every sponsor, half of 962 studies reached it within 29 months; a quarter within 15 and three quarters within 51.

How these figures are worked out, and which studies are left out of them.

Registered
Aug 1, 2018
First posted
Sep 7, 2018
StartActual
May 31, 2018
Primary completionActual
May 1, 2021
CompletionEst.
Mar 1, 2022
Last update
Aug 24, 2021
What these dates mean
Start.
When the first participant enrolled; while estimated, when the study expects to open to recruitment.
Primary completion.
When the last participant was examined or treated to collect data for the study's main question, its primary outcome. A study that stopped early gives the date its data collection stopped.
Completion.
When the last participant's last visit took place, for every outcome, secondary ones and side effects included: the end of the study. Often later than primary completion, sometimes the same day.
Actual and Est.
Actual means the registry says the date has happened. Est. (estimated) is a date the sponsor plans or expects. It can still move, and the sponsor is expected to change it to actual once it has passed.
No changes since tracking began. The registry record was last updated on Aug 24, 2021, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT03661034
Lead sponsor
Cognito Therapeutics, Inc.
Responsible party
Sponsor
First posted
Sep 7, 2018
Start date
May 31, 2018
Primary completion
May 1, 2021
Completion
Mar 1, 2022 (estimated)
Last update
Aug 24, 2021

Study contacts

Evan R Hempel
study chair · Cognito Therapeutics

Oversight

Data monitoring committee
Yes
FDA-regulated drug
No
FDA-regulated device
Yes
View the source record on ClinicalTrials.gov ↗

Not currently enrolling

This study is status unknown, as verified in Aug 2021. You cannot join it, but the record below documents what was studied.

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