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Is MGA the next step up in the evolutionary chain?

Lawrence Robinson11/16/22 4:13 PM (CST)
I recently had an young individual with a lacerated ulnar nerve at the elbow who retained good hand function, particularly of FDI.  It turns out he had a HUGE Martin Gruber Anastamosis (see figure from 1 year post injury and repair) that saved his intrinsic function. 

I am thinking that this redundant innervation is an evolutionary advantage.  I've also heard that MGA is associated with higher levels of intelligence and good looks (unpublished observations).  It's present in 20% of people.  Not sure if I mentioned I personally have MGA.

What do others think?  Evolutionary advantage or random mutation?  Not sure I see any downsides to MGA.
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