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Neural computations of visual, semantic, and memorability features in the human brain
Biorxiv : the Preprint Server for Biology
|September 15, 2025
Summary
Object recognition involves visual, semantic, and memory features. This study reveals how memorability is encoded distinctly across the brain, influencing early visual and semantic processing.
Area of Science:
- Neuroscience
- Cognitive Science
- Computational Neuroscience
Background:
- Object recognition integrates visual, semantic, and memory processes beyond the visual cortex.
- The interaction and encoding of visual, semantic, and memorability attributes remain unclear.
Purpose of the Study:
- To investigate the spatiotemporal neural encoding of visual, semantic, and memorability attributes during object perception.
- To understand how these attributes interact and are represented across different brain regions.
Main Methods:
- Intracranial electroencephalography (iEEG) was recorded from 5143 channels.
- High-resolution 7T functional MRI (fMRI) and single-neuron recordings were used for corroboration and validation.
- Analysis focused on spatiotemporal patterns of neural encoding for object attributes.
Main Results:
- Memorability was encoded in a distributed manner, dissociable from visual and semantic coding.
- The ventral temporal cortex (VTC) encoded all three attributes, but with distinct representations.
- Memorability representations in the prefrontal cortex integrated VTC signals, and memorability influenced early visual and semantic processing.
Conclusions:
- Visual, semantic, and memorability attributes are dynamically encoded across the brain.
- These attributes interact in complex ways, influencing object recognition and memory formation.
- Findings provide a comprehensive view of attribute encoding and integration in object recognition.
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