The corpus callosum is a mammalian invention; reptiles, amphibians, and many creatures lower in the evolutionary tree have two brain centers that are not connected by direct neural pathways as mammals are.

factualpending

Speaker

Iain McGilchrist

Evidence Quote

“the corpus callosum many people don't realize is a mammalian invention so although reptiles amphibians and many other creatures lower down that tree have two centers in their brain they're not connected in this direct way”

Source

Iain McGilchrist, Rupert Sheldrake and Alex Gomez-Marin in conversation— Dr Iain McGilchrist
Created: 8/12/2026, 6:27:29 PM

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