FIG. 4.

The active VOR measured during each training epoch for subject #1. The active VOR gain for head impulses towards the adapting side steadily increased from 0.9 to 1.14 during unilateral incremental training. In contrast, the gain towards the non-adapting side did not vary during the training. Best line fits (adapting side—thick dashed black; non-adapting side—thin dashed black) for the training data across all subjects (n = 9) show that there was a significant relationship between gain and training epoch number only for head impulses towards the adapting side.