Imaging During Subliminal Perception

Healthy Clinical Trial

Official title: Functional Imaging During Subliminal Perception

Status Completed

Clinical Trial Summary

Subliminal perception of visual stimuli can be studied with functional brain imaging, e.g. with functional magnetic resonance imaging (fMRI). However, it is unclear how subliminal perception affects connectivity in the brain.

Further, it is not known if real-time (rt) fMRI neurofeedback of brain areas involved in subliminal perception can lead to supra-threshold perception.

For attention tasks, the investigators hypothesize that functional connectivity strength is mediated by the insular cortex during both supra-threshold and subliminal perception.

Additionally, the investigators hypothesize that rt-fMRI neurofeedback training should alter neuronal and behavioral responses.

Clinical Trial Description

In this project, using healthy adults, the investigators have 2 aims:

1. Apply electroencephalography (EEG) and fMRI before and after rt-fMRI neurofeedback during attention tasks to identify brain regions involved in subliminal and supraliminal perception.

2. Apply functional connectivity analyses during these tasks. ;

Related Conditions & MeSH terms

• Healthy

• NCT number: NCT04643340
• Study type: Observational
• Source: University of Zurich
• Status: Completed
• Start date: March 15, 2020
• Completion date: December 1, 2022