Recovery of dynamic posture function after chemical UL. Each point represents the global score of the rats to the air-righting and landing reflex tests at each postoperative time and was compared to preoperative values. A zero score indicated a normal vestibular function, scores ranging from 1 to 4 pointed to vestibular dysfunction and less complete vestibular compensation. Before chemical UL (pre-op), the mean global score was zero. After the lesion, rats failed in performing correct body air-righting and landing reflexes. Recovery was complete 42 days after UL. According to Bonferroni's principle, P < 0.0038 was considered significant. * P < 0.0038, ** P < 0.00038, versus preoperative values.