Zap! Ouch! That hurts! But why? And how come people don't experience or respond to pain in the same way? Take a journey on the sensing pathway, from your nociceptors, along your nerves, up your spinal cord, to neurons and glial, through gray matter and white matter, to your cortex. Learn about endorphins and enkephalins, as well as new research into how to treat pain in a short, painless video.