Measures of Body Sway
We use several methods for quantifying how people balance. One method is to measure the forces underneath the feet of a subject as they move back and forth. This measurement, called the Center of Pressure (CoP), is determined by placing force transducers on the platform on which the subject stands. Another way is to attach sensors that measure movement relative to an electromagnetic transmitter. In this way, the movement of individual body parts can be studied. Using these techniques, movement of the virtual environment can be correlated with movement of the head and CoP.
Roll your cursor over the image below
to see the patient "sway" in the checkerboard tunnel.