Are Posture Control Insoles the only thing that causes proprioception?
No, any sensory input can cause a proprioceptive response. Try tickling someone or a getting a pebble in your shoe. Anything you put in your shoes will cause your feet to return a sensation to your brain, but the brain determines the appropriate response ranging from nothing to maximum speed muscle action. Posture Control Insoles are designed to solicit a specific muscular response. For many, arch supports provoke unintended muscle action causing the feet to roll out (supination) or avoid the arch because it hurts.
