Cornell psychology researchers propose that everyday tasks lead to a division in visual information processing in the brain. The left hemisphere specializes in high-frequency visual input for right-handed individuals, while the right handles low-frequency information. The action asymmetry hypothesis suggests that this specialization is influenced by how we perform actions with our hands. New findings reveal that left-handed individuals have reversed high-frequency visual processing. The research challenges older theories that attributed hemispheric asymmetry to prenatal development or language factors, instead linking it to actions related to handedness.
Casasanto stated, "We found the same pattern you always find in righties, whose left hemispheres are specialized for high-frequency visual perception - and the exact opposite in lefties." This indicates a clear distinction of visual processing based on hand dominance.
The action asymmetry hypothesis posits that the organization of perceptual systems in the brain is influenced by how actions are performed with hands, showcasing the relationship between motor actions and visual perception.
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