Relating to or involving the corpus callosum, the bundle of nerve fibers connecting the two hemispheres of the brain.
From Latin 'callosus' (thick, hard) via the anatomical term 'corpus callosum.' Medieval anatomists named it for its tough, thickened appearance.
Split-brain experiments in the 1960s revealed that severing the corpus callosum literally splits your consciousness—the two sides of your brain can have different opinions, memories, and even preferences without knowing it.
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