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Why do infants need reflexes?

Updated: 8/10/2023
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11y ago

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We've evolved to react automatically to some things; for instance newborn babies are born with the reflex to 'suck' if an object is put into their mouth and 'swallow' liquid, e.g. milk, in order to survive. If that was something that had to be learnt, they wouldn't live long enough to learn it. Or if we are exposed to extreme heat, like fire, our reflex is to move away from it, or we would get burnt. The well-known 'knee-jerk' reflex, combined with other muscles, helps us to walk without needing to think about each step. Through natural selection, animals and humans with these extra survival abilities have lived to pass on their genes, wheras the ones who died of malnourishment as infants, or were burnt to death, didn't.

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15y ago
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Q: Why do infants need reflexes?
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