Temporal Interference Methods for Non-invasive Deep Brain Stimulation, Study 1.3

Summary

This grant aims to develop a line of research using temporal interference (TI) electrical neurostimulation technology to understand the causal role of deep brain structures in cognition. In the short term, the investigators aim to validate and characterize the effects of TI on brain activity as measured by fMRI and demonstrate its ability to focally stimulate deep brain regions without affecting overlying cortex. In the longer term, investigators aim to use these data to resolve longstanding debates about the function of deeper brain regions and lay the foundation for future clinical applications of TI for treating addiction, Obsessive-Compulsive Disorder (OCD), Parkinson's disease, and other disorders involving deep brain dysfunction. The grant supports 2 distinct aims, each of which will be evaluated through a series of independent studies.

Conditions

• Healthy Volunteers

Interventions

DEVICE

Temporal Interference (TI) Electrical Stimulation - dACC Comparison Frequency TI Sham

Same setup as the dACC comparison frequency TI Active condition, except that stimulation immediately ramps down after reaching the target intensity following ramp up, producing a sham condition.

DEVICE

Temporal Interference (TI) Electrical Stimulation - dACC 20 Hz TI Active

Non-invasive electrical brain stimulation delivered through two sets of scalp electrodes using alternating current frequencies at up to ±5 mA per channel, corresponding to 10 mA peak-to-peak. For the dACC 20 Hz TI Active condition, one channel will deliver 2000 Hz and the other 2020 Hz, producing a 20 Hz beat frequency targeting the dorsal anterior cingulate cortex. Stimulation is administered in 2-minute on / 2-minute off cycles with a 30-second ramp up and ramp down beginning at the start of each 2-minute period.

DEVICE

Temporal Interference (TI) Electrical Stimulation - dACC 20 Hz TI Sham

Same setup as the dACC 20 Hz TI Active condition, except that stimulation immediately ramps down after reaching the target intensity following ramp up, producing a sham condition.

DEVICE

Temporal Interference (TI) Electrical Stimulation - dACC Comparison Frequency TI Active

Non-invasive electrical brain stimulation delivered through two sets of scalp electrodes using alternating current frequencies at up to ±5 mA per channel, corresponding to 10 mA peak-to-peak. For the dACC comparison frequency TI Active condition, stimulation will be delivered using a selected beat frequency in the 1-100 Hz range. Stimulation is administered in 2-minute on / 2-minute off cycles with a 30-second ramp up and ramp down beginning at the start of each 2-minute period.

Sponsors & Collaborators

• National Institute of Mental Health (NIMH)

  collaborator NIH

• Indiana University

  lead OTHER

Principal Investigators

• Joshua W Brown, PhD · Indiana University, Bloomington

Study Design

Allocation

RANDOMIZED

Purpose

BASIC_SCIENCE

Masking

SINGLE

Model

CROSSOVER

Eligibility

Min Age

18 Years

Max Age

50 Years

Sex

ALL

Healthy Volunteers

Yes

Timeline & Regulatory

Start

2026-05-30

Primary Completion

2026-07-31

Completion

2026-07-31

FDA Device

Yes

Countries

• United States

Study Locations