Investigating the Effect of Normal Frequency-band and Infra-low Frequency Neurofeedback on Functional Brain Connectome

Summary

In this basic research project a novel form of neurofeedback is investigated, in which in addition to the use of 1) normal frequency bands (1-35 Hertz), 2) very slow signals (low frequency; \< 0.1 Hertz) are used, which correspond more to the basic excitability of the brain. Because of the slow signal characteristics, this method is called infra-low frequency neurofeedback (ILF-NFB for short). Although this method has been successfully applied in clinical settings since the 1980s, the mechanisms underlying the effect are largely unexplored. For that purpose, a project consistiong of three studies will be conducted in order to investigate the neurophysiological effects of both signal elements on healthy participants:

* Study 1 examines the effects of normal frequency band training alone.
* Study 2 examines the effects of low frequency training.
* Study 3 examines the effects of the combination of normal frequency band and low frequency training

For each study, a total of 40 clean data sets are to be collected, resulting in a minimum amount of 120 participants for all three studies.

All three studies investigate the effects of the neurofeedback on brain connectivity patterns by means of functional magnetic resonance imaging (fMRI), accompanied by measurements of the autonomic nervous system (ANS) and behavior.

Conditions

• Neurofeedback

Interventions

DEVICE

Real Neurofeedback

Real Neurofeedback with visual and acoustic feedback presentation based on the EEG-signal from the participant (Signals used described in corresponding study arm). The NFB-signals are obtained from the T4 and P4 positions according to the 10-20 EEG placement consensus. NFB is done using the software package Cygnet (BEE Medic GmbH Technologies, Kirchberg, Switzerland) and for all participants the same neurofeedback-animation is used. NFB training duration is approx. 30min

DEVICE

Sham Neurofeedback

The sham neurofeedback is performed in identical fashion using the same software, feedback, electrode placement, duration as in the real neurofeedback. Only difference is that a pre-recorded EEG-dataset will be used and the feedback signal is thus independent from the brain activity of the participant.

Sponsors & Collaborators

• Philipp Stämpfli

  lead OTHER

Principal Investigators

• Philipp Stämpfli, PD PhD · Psychiatric University Hospital, Zurich

Study Design

Allocation

RANDOMIZED

Purpose

BASIC_SCIENCE

Masking

DOUBLE

Model

PARALLEL

Eligibility

Min Age

18 Years

Sex

ALL

Healthy Volunteers

Yes

Timeline & Regulatory

Start

2023-01-13

Primary Completion

2024-12-18

Completion

2024-12-18

Countries

• Switzerland

Study Locations