TMS to object cortex affects both object and scene remote networks while TMS to scene cortex only affects scene...

Area of Science:

• Neuroscience
• Cognitive Neuroscience
• Visual Perception

Background:

• Visual perception seamlessly integrates object and scene information through complex brain computations.
• Understanding the precise connectivity of these visual processing networks is crucial for cognitive neuroscience.

Purpose of the Study:

• To investigate the functional connectivity between object and scene processing regions in the brain.
• To determine how transient neural noise in specific cortical regions influences network communication.

Main Methods:

• The study employed a combination of repetitive transcranial magnetic stimulation (rTMS) and functional magnetic resonance-adaptation (fMR-A).
• rTMS was applied to object-preferential lateral occipital (LO) and scene-preferential transverse occipital sulcus (TOS) regions.
• fMR-A measured changes in brain activity at stimulation sites and remote regions before and after rTMS.

Main Results:

• rTMS application modulated the blood-oxygen-level-dependent (BOLD) signal at both the stimulation site and remote brain regions.
• Inter- and intrahemispheric connections were identified between LO, TOS, and the posterior parahippocampal place area (PPA).
• Stimulation of the LO region also affected parietal and frontal areas outside the ventral visual stream, suggesting dorsal-ventral stream interaction.

Conclusions:

• The findings demonstrate significant functional connectivity within and between object and scene processing networks in the human brain.
• The study provides evidence for interactions between the ventral and dorsal visual streams, potentially indicating a shared framework for perception and action.
• This research advances our understanding of how the brain integrates visual information for a cohesivePerceptual experience.