tDCS Effects on GABA Concentration and Brain Functional Connectivity in Older Adults Of Working Age

NCT ID: NCT02794272

Last Updated: 2017-01-06

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

COMPLETED

Clinical Phase

NA

Total Enrollment

24 participants

Study Classification

INTERVENTIONAL

Study Start Date

2016-04-30

Study Completion Date

2016-08-31

Brief Summary

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The aim of this study is to investigate whether anodal tDCS over the left M1 leads to a decrease of GABA concentration and alterations of functional brain connectivity in older people, compared to sham tDCS.

Detailed Description

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Conditions

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Healthy Older Adults

Study Design

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Allocation Method

RANDOMIZED

Intervention Model

CROSSOVER

Primary Study Purpose

TREATMENT

Blinding Strategy

SINGLE

Participants

Study Groups

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Anodal tDCS

Anodal stimulation during resting state fMRI

Group Type EXPERIMENTAL

tDCS

Intervention Type DEVICE

Cathodal tDCS

Cathodal stimulation during resting state fMRI

Group Type EXPERIMENTAL

tDCS

Intervention Type DEVICE

sham tDCS

Sham stimulation during resting state fMRI

Group Type SHAM_COMPARATOR

sham-tDCS

Intervention Type DEVICE

Interventions

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tDCS

Intervention Type DEVICE

sham-tDCS

Intervention Type DEVICE

Eligibility Criteria

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Inclusion Criteria

* unobtrusive neuropsychological screening
* age: older adults of working age: 50-65 years

Exclusion Criteria

* Mild cognitive impairment (MCI) or other neurological diseases.
* History of severe alcoholism or use of drugs.
* Severe psychiatric disorders such as depression, psychosis (if not in remission) and severe untreated medical problems.
* Contraindication for MRI (claustrophobia, metallic implants, ferromagnetic metals in the body, disorders of thermoregulation, pregnant women).
Minimum Eligible Age

50 Years

Maximum Eligible Age

65 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

Yes

Sponsors

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Physikalisch-Technische Bundesanstalt Institut Berlin (PTB)

OTHER

Sponsor Role collaborator

Charite University, Berlin, Germany

OTHER

Sponsor Role lead

Responsible Party

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Agnes Flöel

Prof. Dr.

Responsibility Role PRINCIPAL_INVESTIGATOR

Principal Investigators

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Agnes Flöel, Prof. Dr.

Role: PRINCIPAL_INVESTIGATOR

Charite University, Berlin, Germany

Locations

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Charité Universitätsmedizin Berlin

Berlin, State of Berlin, Germany

Site Status

Countries

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Germany

References

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Bachtiar V, Near J, Johansen-Berg H, Stagg CJ. Modulation of GABA and resting state functional connectivity by transcranial direct current stimulation. Elife. 2015 Sep 18;4:e08789. doi: 10.7554/eLife.08789.

Reference Type BACKGROUND
PMID: 26381352 (View on PubMed)

Amadi U, Allman C, Johansen-Berg H, Stagg CJ. The Homeostatic Interaction Between Anodal Transcranial Direct Current Stimulation and Motor Learning in Humans is Related to GABAA Activity. Brain Stimul. 2015 Sep-Oct;8(5):898-905. doi: 10.1016/j.brs.2015.04.010. Epub 2015 May 1.

Reference Type BACKGROUND
PMID: 26279408 (View on PubMed)

Stagg CJ, Bachtiar V, Amadi U, Gudberg CA, Ilie AS, Sampaio-Baptista C, O'Shea J, Woolrich M, Smith SM, Filippini N, Near J, Johansen-Berg H. Local GABA concentration is related to network-level resting functional connectivity. Elife. 2014 Mar 25;3:e01465. doi: 10.7554/eLife.01465.

Reference Type BACKGROUND
PMID: 24668166 (View on PubMed)

Other Identifiers

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TRAINSTIM1.B

Identifier Type: -

Identifier Source: org_study_id

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