Dynamic interactions between the cerebral hemispheres
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Updated: Mar 25, 2026

Inter-Brain Synchrony in Open-Ended Collaborative Learning: An fNIRS-Hyperscanning Study
Published on: July 21, 2021
1Department of Neuroscience, Karolinska Institutet, Retzius väg 8, 17177, Stockholm, Sweden. Giorgio.Innocenti@ki.se
Abstract:
The cortical areas of the two hemispheres interact via the corpus callosum. This paper reviews recent findings in animals and man, showing that the visual areas of the two hemispheres control each other's dynamics. The interaction is stimulus-dependent and stimulus-specific. It consists of both excitatory and inhibitory inputs controlling the formation of synchronous neuronal assemblies across and within the hemispheres. The findings are consistent with the geometry of callosal axons and their inferred computational properties. These are the first findings to suggest a direct relationship between the geometry of cortical connections, and the formation of stimulus-driven synchronous neuronal assemblies.
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