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Feedback signals in visual cortex during episodic and schematic memory retrieval and their potential implications for
Johanna Bergmann1, Javier Ortiz-Tudela2
1Department of Psychology, Max Planck Institute for Human Cognitive and Brain Sciences, Leipzig, Germany.
Neuroscience and Biobehavioral Reviews
|July 31, 2023
Summary
Visual feedback from episodic memory impacts early visual processing, while schema memory feedback affects intermediate levels. This suggests aphantasia may stem from
Area of Science:
- Neuroscience
- Cognitive Psychology
- Visual Perception
Background:
- Visual processing involves feedback from memory systems.
- Episodic and schema-related memories show differential feedback patterns in visual hierarchy.
- The 'what' and 'where' visual streams are key to understanding perception.
Purpose of the Study:
- To examine differences in visual feedback from episodic versus schema-related memories.
- To propose a new framework integrating visual streams and memory feedback.
- To re-evaluate memory deficits in aphantasia within this framework.
Main Methods:
- Review and synthesis of recent findings on visual feedback and memory.
- Analysis through the lens of the 'what' and 'where' visual processing streams.
- Theoretical proposal regarding aphantasia and high-level feedback.
Main Results:
- Episodic memory feedback influences early visual processing stages.
- Schema-related memory feedback impacts intermediate visual processing levels.
- A distinction in feedback processing exists between memory types.
Conclusions:
- Aphantasia may represent a deficit in high-level 'what' stream feedback processing.
- This contrasts with the traditional view of episodic memory impairment.
- The findings offer a novel perspective on the neural basis of aphantasia.
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