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. Author manuscript; available in PMC: 2013 Jul 23.
Published in final edited form as: J Neurosci. 2013 Jan 23;33(4):1696–1705. doi: 10.1523/JNEUROSCI.3067-12.2013

Figure 1.

Figure 1

Projections of primary visual cortex (V1) to the SC. A, In situ image of callosal connections retrogradely labeled with the fluorescent tracer, bisbenzimide (blue). BDA injection site is indicated by arrow. White lines indicate the rostrocaudal level of the coronal sections shown in B and B′. B, Coronal section showing bisbenzimide-labeled callosal connections and injection site (arrow) in acallosal V1 near the callosally connected band at the V1/LM border (arrowhead). B′, Darkfield image of injection site in section adjacent to B, showing that BDA is confined to gray matter. C, Darkfield images of BDA labeled terminal axonal branches in superficial layers of the SC at anterior (top), middle and posterior (bottom) levels of the projeciton. Superficial layers consist of the zona layer (Zo), the superficial gray layer (SuG) and the optic nerve layer (Op). Deep layers consist of the ventral intermediate gray layer (InG), the intermediate white layer (InWh), the deep gray layer (DpG), deep white layer (DpWh) and the periaqueductal gray (PAG). D, Myeloarchitecture of the SC. Abbreviations in A, B: S1 (primary somatosensory cortex), Au (auditory cortex), RSD (dorsal retrosplenial cortex), Ent (entorhinal cortex). Compass in A, B′ and C: anterior (A), medial (M), posterior (P), lateral (L), dorsal (D), ventral (V). Scale bar: 1mm (A, B, B′, D), 0.5mm (C).