Figure 2.

Summary of EEG data preprocessing and analysis steps. After EEG data preprocessing (dotted rectangles), a cluster of maximally temporally independent EEG components deemed to resemble AC activity was extracted (light gray rectangles). Intervals showing gap effects were identified and deemed to resemble neural on/off responses. These responses were further investigated for orthogonal effects related to restoration, restored sound, and context. To verify whether restoration influenced activity in AC, distributed source analyses were conducted (dark gray rectangles). These cortically constrained analyses were based on the whole set of artifact-reduced components and served to localize the restoration-related changes that were identified in the cluster-based analyses (see Results).