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Seeing mathematics: perceptual experience and brain activity in acquired synesthesia
Berit Brogaard1, Simo Vanni, Juha Silvanto
1a Department of Philosophy and , Center for Neurodynamics, University of Missouri , St. Louis , MO , USA.
Neurocase
|September 4, 2012
Summary
This study explores acquired synesthesia in patient JP, who visualizes mathematical formulas as geometric shapes. Brain imaging revealed that these visual mathematical experiences are primarily processed in the left hemisphere.
Area of Science:
- Neuroscience
- Cognitive Psychology
- Mathematical Cognition
Background:
- Investigating the neural underpinnings of synesthesia, a condition where sensory pathways cross.
- Exploring the relationship between mathematical processing and visual imagery.
Observation:
- Patient JP exhibits exceptional geometric drawing skills and acquired synesthesia, perceiving mathematical formulas and objects as geometric figures.
- JP consistently visualizes smooth curvatures as discrete lines, irrespective of scale.
Findings:
- Functional magnetic resonance imaging (fMRI) revealed heightened activation in the left temporal, parietal, and frontal lobes when JP encountered image-inducing mathematical formulas.
- The study's primary finding indicates that the neural activity linked to JP's complex geometric visualizations of mathematical formulas is localized to the left cerebral hemisphere.
Implications:
- This case provides unique insights into the neural basis of synesthesia and its interaction with mathematical cognition.
- Understanding such specialized cognitive processing can inform theories of brain plasticity and sensory integration.
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