This is a reflex test. Have your child walk on the outside edges of their feet. Their arms should swing naturally—just like a typical walk. But if the elbows bend, the wrists rotate inward, or the arms stiffen— That’s not poor posture. That’s a retained primitive reflex. Specifically: ATNR Asymmetrical Tonic Neck Reflex. It should disappear after infancy. If it’s still firing? It can disrupt movement, attention, even emotional regulation. Want to test it further? Walk with toes turned out like a