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You Actually Share Your Brain With a Silent Stranger

CGP Grey · 20.2M views · 2016-05-31 · 4:58

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Overview

CGP Grey explains split-brain patients, where severing the corpus callosum lets the two hemispheres act independently. He uses this to explore the idea of two minds in one head.

On Hacker News

HN returns to it constantly in consciousness and decision-making threads as a clear, entertaining explanation of split-brain.

Recommended by 7 HN people across 7 months · HN mentions 2016–2025

Topics

Neuroscience & the brainConsciousness & cognition
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split braincorpus callosumconsciousnessneurosciencecgp grey

What people said

otto_ortega · 2017-01 · Strong recommendation

If you just learned that "Split Brain" was thing, I recommend watching this video by GPGrey, one of the best educational channels on YouTube: [VIDEO]

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alexpotato · 2025-05 · Recommendation

This reminds me of the following quote: "Coding largely involves the 'logical part' of your brain. It tends to not include the 'language part' of your brain. This is one reason why comments you add to code are so useful: they force you to engage both parts of your brain and therefore get better results. This is also why when you go to explain a problem to a colleague, you often have a flash of brilliance and solve the problem: you are reframing the problem using a different part of your brain and the different part of your brain helps solve the problem." I'm sure some readers here will say this is preposterous and there is no such thing as having "two parts of your brain". To them I suggest watching: 1. "You are are two" (about people with their corpus callosum being severed) [VIDEO] 2. "Conscious Ants and Human Hives" by Peter Watts [LINK]

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tick_tock_tick · 2021-10 · Recommendation

Every time someone brings up consciousness I like to bring up [VIDEO] . Split brains imply some very interesting ideas around of consciousness.

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Sources

Video by CGP Grey, played through YouTube.

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