Figure 2.

Average gray levels of sound-induced c-Fos immunoreactivity in nuclei of the inferior colliculus at different times after a unilateral cortical lesion. In control non-stimulated groups, means were higher (i.e., shifted toward lighter gray levels) than in the stimulated control. Comparisons between stimulated controls and lesioned stimulated groups shows that the average levels shift toward values closer to the white side of the gray range at 1 and 15 days after the lesion. Ninety and 180 days after the lesion, gray values return to levels comparable to controls. The asterisks show the significant differences (average ± 2SD) between both, the non-stimulated control and the group of stimulated control, and the stimulated control group and lesioned groups.