Скачать или смотреть Concussion effects on balance and walking

These videos illustrate the effect that a concussion can have on the ability to control balance while walking. They were developed by the University of Oregon Motion Analysis Laboratory.
Two high school students -- one, a victim of a concussion and the other, a healthy control subject -- were fitted with reflective markers that are picked up by cameras that emit near-infrared light. The cameras send information to a computer that generates a three-dimensional model of the subject's motion.
The first student -- the control -- walks at a decent speed, without much difficulty or side-to-side sway.
The second student -- who was involved in a helmet-to-helmet collision at a football practice two days earlier -- walks at a slower speed and demonstrates poor side-to-side control and a lack of symmetry to his movement.