Figure 5.

Dusp1 and egr1 mRNA expression patterns in zebra finch brain after visual stimulation with light. Shown are negative-image film autoradiographs of in situ hybridizations with dusp1 (A) and egr1 (B), from a sitting still control male bird in the dark with the left eye covered (A_1–3: dusp1; B_1–3: egr1), and a male bird stimulated with lights on for 45 minutes also with the left eye covered (A_4–6: dusp1; B_4–6: egr1). Adjacent sagittal sections were used for each gene. Contralateral hemisphere is opposite of the open eye; ipsilateral hemisphere is the same side as the open eye. White, gene expression. Lines and names in yellow, visual areas where each mRNA was induced. The right-most column shows anatomical profiles of brain areas, in which visual areas are highlighted in red and others in black (C). Sections are coronal. Dorsal is up, and right hemisphere is on the right. For abbreviations, see list. Scale bar = 1 mm in B₆ (applies to A₁–B₆).