Materialism is a theory that said everything is physical(matter). Everything is a material object with no minds, souls, or spirit. The brain chemistry argument has the same idea with materialism since it said our brain is just an electrochemical system with no mind or soul. Ramachandran talked about Capgras syndrome, Phantom limb pain and Synesthesia and stated it as an example of the brain chemistry argument.
First he talked about Capgras syndrome, the person's brain was injured and they couldn't recognize people's faces, but they could recognize their voices. This support the brain chemistry argument. The reason why the person was not able to recognize people's faces was because part of the brain was injured. The chemical in the person's brain effected the memory and casue us to forget people's faces.
Phantom limb pain was about a person who faced a limb pain and was cured by looking at the mirror box to tricked the person's brain. The person's pain is removed by believing that the phantom is real and it is moving. This support the brain chemistry argument because it shows us that our pain can be removed from the brain being fooled.
Synesthesia showed us that people related number with color. Even just words like booba and kiki can cause us to think of shapes. This support the brain chemistry argument because we recognize things just by the chemical reaction in our brain. It can relate a shape with a sound or a color.
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