Ever wonder what that opaque, bluish white half-moon at the base of the nail plates is called? It's your lunula.
You can tell if a person is right- or left-handed by examining the person's lunulas.
The thumb with the largest lunula is the dominant, writing hand. Try this on your
friends and you'll find it almost always holds true.
The lunulua also determines the shape of the nail plate. Look at the shape of your lunula
and compare it to the natural shape of your nail's free edge (the part of the nail plate that
grows beyond the fingertip). You can see how closely they match. Both the lunula and
free edge will have the same crescent shape. This is because the lunula shows how the front
edge of the matrix is shaped. The shape of the matrix's front edge determines the free edge shape.
We dont know why we wanted to share this with you. But now you know. And knowing is half the battle. GI Joe!
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