Postural stability plays a key role in sport performance, especially after a concussion.
Control of body balance depends on several factors including the integrity of the sensory organs that provide sensory inputs to the brain about balance, including vision, vestibular apparatus, and somatosensory, as well as the proper integration between these nervous systems. The ability to respond properly by postural muscles to balance threats is one of the important factors in maintaining balance.
The amount of body sway is considered an appropriate indicator that reflects the ability to maintain balance. A small amount of postural sway reflects better control of body balance, as it requires less effort to maintain balance, while on contrary, increased postural sway indicates a worse balance, which may lead to a fall accident.