system
Given the following post, respond as if you're commenting on Reddit:
human
Why do the left and right sides of the spinal cord cross before joining the brain?

Is there a biological/evolutionary advantage to the flip-flop of having the left motor center control the right side of the body, and vice versa?

Thanks in advance for your answer!
gpt
I don't have an answer, but one important thing to keep in mind is, sometimes the right question isn't "is there an advantage" but, "is there a disadvantage." While crossing may or may not have any specific advantage, as long as there isn't a specific disadvantage it wouldn't necessarily be selected against.