Eli5: why can’t your brain stop you from getting sick?

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When someone has an autoimmune disease, their brain is sending electrical waves to tell the immune system to attack what it believes to be bad cells. So why can’t you just tell your brain to stop sending those messages, since it’s the one sending them in the first place?

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Anonymous 0 Comments

Simply put, the system is just too complex for simple solutions like that. Your brain is not hard-wired to directly control every single cell in your body, and all of your bodily processes form an incredibly complicated and interconnected network of reactions, checks and balances. You’re basically a meatbag with enzymes and hormones sloshing in it, and we do not have a good understanding of how all of it even works together.

If some of the cells start behaving weirdly, you can’t just wish and make them stop doing that, whether it’s diabetes, depression or cancer.

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