About This Lesson
It turns out pain isn’t always the same. What hurts me a whole lot may not hurt you so much. Consider the experiment done by researchers at the University of Michigan. They injected volunteers with a saline solution in their jaw muscles, simulating TMJ. If you have TMJ, a jaw condition brought on by stress, you know it hurts. Everybody agreed the imitation TMJ was an unpleasant experience. But, interestingly, for some folks that’s all it was—unpleasant. Others were in a world of hurt. So why did some people feel pain more than others?
