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Evaluating the organizational structure and specificity of network topology within the face processing system
Daniel B Elbich1, Peter C M Molenaar2, K Suzanne Scherf1
1Department of Psychology, The Pennsylvania State University, University Park, Pennsylvania.
Human Brain Mapping
|February 20, 2019
Summary
The brain
Area of Science:
- Neuroscience
- Cognitive Neuroscience
- Functional Neuroimaging
Background:
- The processing of faces is crucial for social interaction.
- Previous research often focused on individual brain regions rather than network interactions.
- Understanding the dynamic connectivity of the face processing network is essential.
Purpose of the Study:
- To investigate the topology of directed functional connections within the face processing network.
- To determine if this network topology is specific to face stimuli.
- To utilize a data-driven approach to map connectivity patterns.
Main Methods:
- Functional magnetic resonance imaging (fMRI) was used in young adults.
- Participants viewed movies of faces, objects, and scenes.
- GIMME (Group Iterative Multiple Model Estimation) modeled effective connectivity.
Main Results:
- Directed connections were observed from the right posterior superior temporal sulcus to the right occipital face area and right fusiform face area (FFA) during face processing.
- Connectivity between core and extended regions was limited to a feed-forward connection from the FFA to the amygdala.
- The network topology during face processing was distinct from that during object or scene viewing.
Conclusions:
- The functional connectivity within the face processing network, especially in right core regions, may be less hierarchical and feed-forward than previously thought.
- Network connection topologies are specialized, emergent, and dynamically adapt to task demands.
- This study highlights the importance of network interactions in understanding brain function.
Keywords:
amygdalaeffective connectivityfMRIface processingfusiform face areaposterior superior temporal sulcusMore Related Videos
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