Higher-magnification photomicrographs showing downregulation of hybridization signals for GAP-43 mRNA (A, C) and SCG10 mRNA (B, D) after 10 d of monocular deprivation. A, B, Layers I–IV of the LGN ipsilateral to the TTX-injected eye. The photomicrographs were taken from the same section as in Figure 4. C,D, Layers I–IV of the LGN contralateral to the TTX-injected eye. The photomicrographs were taken from the same section as in Figure 5. Scale bar, 100 μm.