Body sway in tilting condition

Body sway in patients standing with eyes closed was observed by tilting the plate toward the front, back, left, and right. Patients with equilibrium dysfunction produced a specific body sway under these conditions. It is shown that merely standing on the flat plate does not always show a specific pattern even in patients with equilibrium dysfunction. However, for subjects standing on the tilting plate, it is possible to discriminate equilibrium disorders from normals. Eight directional display and a power spectrum of body sway are useful for the diagnosis of equilibrium dysfunction. Abnormal subjects show a peculiar pattern in the radar chart display of displacement, and the power spectrum of body movement does not obey the rule of 1/f fluctuation