To investigate the equilibrium function of elderly patients experiencing dizziness caused by age-dependent physiological vestibular dysfunction (presbyastasis) and to evaluate the effects of a vestibular rehabilitation program, the author conducted a new balance training program, referred to as the cross test. Nine patients over the age of 65 years who had presbyastasis and who had complained of equilibrium dysfunction for at least 6 months were enrolled in this study. A standing balance training system with a gravicorder was used to examine the patients' equilibrium. The cross test indicat...