Effects of Gamma-tACS on EEG Periodic Activity

NCT ID: NCT05809076

Last Updated: 2023-04-12

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

34 participants

Study Classification

INTERVENTIONAL

Study Start Date

2021-07-20

Study Completion Date

2023-01-18

Brief Summary

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In this study on healthy subjects, the effect of transcranial alternating current stimulation (tACS) will be investigated. In particular, the distinction between periodic and aperiodic electroencephalogram (EEG) activity will be considered, as well as the state-dependency phenomenon. Participants will take part in two experimental sessions that will include tACS stimulation (one real, one control). Before, during, and after stimulation, subjects will have their EEG recorded during rest or during tasks.

The aim of this study is to investigate how the modulatory effects of gamma-tACS interact with intrinsic neural activity, measured in terms of periodic and aperiodic activity, as well as neurophysiological and behavioral modulation, taking into consideration the state-dependency phenomenon, which refers to the brain's activation state prior to stimulation.

Detailed Description

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Conditions

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Transcranial Alternating Current Stimulation

Study Design

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Allocation Method

NON_RANDOMIZED

Intervention Model

PARALLEL

Primary Study Purpose

BASIC_SCIENCE

Blinding Strategy

SINGLE

Participants

Study Groups

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real tACS

Group Type EXPERIMENTAL

real tACS

Intervention Type DEVICE

tACS is a non-invasive method to induce brain modulation. It will be applied at a frequency of 40 Hz (gamma-tACS) with a peak-to-peak intensity of 2 mA. During the real tACS condition, the alternating current will be administered for 20 minutes.

sham tACS

Group Type SHAM_COMPARATOR

sham tACS

Intervention Type DEVICE

In the sham tACS condition, the current will be delivered only for the first 30 seconds and then stopped, in order to simulate the same somatosensory sensations as real tACS, but without inducing modulation.

Interventions

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real tACS

tACS is a non-invasive method to induce brain modulation. It will be applied at a frequency of 40 Hz (gamma-tACS) with a peak-to-peak intensity of 2 mA. During the real tACS condition, the alternating current will be administered for 20 minutes.

Intervention Type DEVICE

sham tACS

In the sham tACS condition, the current will be delivered only for the first 30 seconds and then stopped, in order to simulate the same somatosensory sensations as real tACS, but without inducing modulation.

Intervention Type DEVICE

Eligibility Criteria

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Inclusion Criteria

\- Healthy adults

Exclusion Criteria

* Left-handedness (assessed through the Oldfield test)
* Diagnosis of neurological or psychiatric disorders
* Vision problems that prevent reading, not correctable with lenses
* Diagnosis of substance dependence on drugs or alcohol
* Presence of hearing aids/prostheses
* Diagnosis of epilepsy or family history up to the second degree with it
* Episodes of febrile convulsions or recurrent fainting
* Head trauma
* Presence of surgical clips or metal implants in the head
* Diagnosis of heart disease
* Presence of a cardiac pacemaker or artificial heart valve
* Presence of hearing aids/prostheses
* Hearing problems or tinnitus
* Vision problems not corrected with lenses (such as color blindness)
* Taking tricyclic antidepressant medications
* Taking neuroleptic medications
* Diagnosis of headache or migraine
* Taking more than 3 alcoholic units in the last 24 hours
* Taking 2 or more cups of coffee or caffeine from other sources in the last 2 hours
Minimum Eligible Age

18 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

Yes

Sponsors

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IRCCS San Camillo, Venezia, Italy

OTHER

Sponsor Role lead

Responsible Party

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Responsibility Role SPONSOR

Principal Investigators

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Arcara

Role: PRINCIPAL_INVESTIGATOR

IRCCS San Camillo Hospital

Locations

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IRCCS San Camillo Hospital

Venice, , Italy

Site Status

Countries

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Italy

Other Identifiers

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2021.18

Identifier Type: -

Identifier Source: org_study_id

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