Spasticity is usually caused by central nervous system injuries, such as brain injuries or spinal cord injuries. Spasticity is a little different from stiffness.
It's really hard just to watch someone walk to decide what's wrong with them. A better way is to do what's called Three Dimensional Gait Analysis, and that's where the child comes into one of our labs. Here, we put markers on their face, hands, and legs. We have a computer and a bunch of cameras all around the room. And then we're able to break down the gait into three dimensions.