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Exploring the Cortical Hemodynamic Response of Excitatory Brain Stimulation: a Pilot Study

NCT05427552 · Status: COMPLETED · Phase: NA · Type: INTERVENTIONAL · Enrollment: 24

Last updated 2022-09-15

No results posted yet for this study

Summary

Intermittent theta-burst stimulation (iTBS) is a promising treatment for major depressive disorder. However, fewer than 50% of patients show sufficient response. Therefore, the optimal treatment protocol is worth investigating. Recent studies show that the relationship between stimulation intensity and prefrontal hemodynamic response is not linear but in an inverse U-shape by exploring the hemodynamic changes before and after iTBS. Concurrent transcranial magnetic stimulation (TMS)/functional near-infrared spectroscopy (fNIRS) setup allows the investigators to observe the prefrontal hemodynamic response during stimulation.

The aim of this study is to investigate the effects of different intensities on brain activity during and after the stimulation using fNIRS.

Conditions

  • Healthy

Interventions

DEVICE

Intermittent theta-burst stimulation (iTBS)

The iTBS will be applied over lDLPFC with three different intensities. The investigators put the NIRS probe under the TMS coil to detect the hemodynamic signal simultaneously, and the applied rMT was adjusted based on Stokes et al., 2007. The equation is AdjMT% = MT + 2.8 \* (Dsitex - Dm1), and the thickness of the probe is 6mm, therefore, 2.8\*6=16.8(%) were added to the normal intensity.

Sponsors & Collaborators

  • The Hong Kong Polytechnic University

    lead OTHER

Principal Investigators

  • Georg S Kranz, PhD · The Hong Kong Polytechnic University

Study Design

Allocation
RANDOMIZED
Purpose
BASIC_SCIENCE
Masking
SINGLE
Model
CROSSOVER

Eligibility

Min Age
18 Years
Max Age
35 Years
Sex
ALL
Healthy Volunteers
Yes

Timeline & Regulatory

Start
2022-06-01
Primary Completion
2022-08-31
Completion
2022-08-31

Countries

  • Hong Kong

Study Locations

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Read the full study record

This page highlights key information. For complete eligibility criteria, study locations, investigator contacts, and the full protocol, visit the original record on ClinicalTrials.gov.

View NCT05427552 on ClinicalTrials.gov