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Updated: Jan 10, 2026
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Author Spotlight: Insights into Visual Cortex Research Through Wide-View fMRI Mapping
Published on: December 8, 2023
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Visual representations in the human brain rely on a reference frame that is in between allocentric and retinocentric
Maria V Servetnik1,2, Michael J Wolff1, Chaipat Chunharas3
1Ernst Strüngmann Institute for Neuroscience in cooperation with the Max Planck Society, Frankfurt, Germany.
Biorxiv : the Preprint Server for Biology
|November 24, 2025
Summary
The human brain represents visual information using a mixed allocentric and retinocentric reference frame, not purely one or the other. This finding, using electroencephalography (EEG) and head tilt, reveals how visual perception integrates external and retinal cues.
Area of Science:
- Neuroscience
- Cognitive Science
- Visual Perception
Background:
- Visual information is typically processed using an allocentric reference frame, maintaining object orientation regardless of head position.
- The retinotopic cortex's reference frame (allocentric vs. retinocentric) for visual information representation remains debated.
Purpose of the Study:
- To investigate whether the human brain utilizes an allocentric or retinocentric reference frame for visual information processing.
- To dissociate these reference frames using a head tilt manipulation and electroencephalography (EEG).
Main Methods:
- Electroencephalography (EEG) was used with 19 participants performing visual orientation decoding tasks.
- A head tilt manipulation (45°) was employed to differentiate allocentric and retinocentric representations.
- Cross-generalized decoding was performed between head-upright and head-tilted conditions.
Main Results:
- Target orientation was decodable within both head-upright and head-tilted blocks.
- Analyses revealed that visual orientations are represented in a reference frame that is neither purely allocentric nor purely retinocentric.
- This mixed representation was observed from early perceptual stages through the delay period.
Conclusions:
- The human brain employs an intermediate reference frame, blending allocentric and retinocentric cues for visual representation.
- These findings align with primate physiology studies and are the first to show this mixed representation in humans.
- This challenges the notion of a purely allocentric or retinocentric system in human visual processing.
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