The familiar posture of victory — raising the arms, tilting the head back, and expanding the chest — appears to be hard-wired into the human brain, probably because it was a universal sign of dominance in our ape ancestors.

In 2008, psychologists Jessica Tracy and David Matsumoto compared the expressions and body language of sighted, blind, and congenitally blind judo competitors representing more than 30 countries in the 2004 Olympic and Paralympic Games. They found that the blind athletes used the same gestures as their sighted peers, even though they’d never seen anyone else use them.