The average value for vestibular paresis among the study subjects was 78 percent before treatment. Repeat examination 12 months after assigned treatment showed that the mean improvement in vestibular paresis was 40 percent in those who received placebo, 62 percent after treatment with methylprednisolone, 36 percent in those who took valacyclovir, and 59 percent in the combination treatment group. Complete or almost complete recovery of vestibular function occurred in 76 percent of subjects whose treatment assignment included methylprednisolone, compared with 27 percent of subjects who used placebo.
In essence, vestibular rehabilitation aims to minimize and ultimately eliminate the central vestibular asymmetry underlying persistent symptoms of imbalance and unsteadiness. It is different from traditional physical therapy of gait and balance disorders arising from biomechanical or central movement disorders such as Parkinson disease or multiple sclerosis. Vestibular rehabilitation can be performed by patients at home using tailored exercises that focus on challenging the main vestibular reflexes (VOR, VSR) and visual interaction with both reflexes.