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Psoas Minor is a very small muscle that runs right beside Psoas Major and is almost indistinguishable from its big brother which is why it is often not thought to be present. However if it truly is absent then this is often because of general variation from person to person, this works because not having this small muscle does not impede life or mating in any great way. So according to the theaory evolution dictates people will still continue with the adaptation because it does not hinder the production of children.

Yes, in some people it can be absent. People tend to vary, and not everyone has the exact same number of muscles and bones. For example: some people even have six fingers or toes.

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13y ago

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