Fig. 4. Anterograde tracing of IO axons. (A,D,G,J,M) DiI insertion sites in the IO (red stars). Ventral views. IO areas are shown as in Fig. 1P. (B,E,H,K,N) Projection patterns of DiI-labeled axons (white arrowheads) in the contralateral side of the cerebellum. (C,F,I,L,O) Domain patterns of ligand activity detected with EphA3-AP. Black arrowheads indicate projection areas of DiI-labeled axons shown by white arrowheads in B,E,H,K,N. (P) Scheme of cerebellar domains in explant (see Fig. 3B). In each panel, rostral is at the top. (A-C) Axons from the main part of Area L project to the rostral parts of domain C. (D-F) The most caudal part of Area L maps to the rostral domain A. (G-I) Area Ic maps to the rostral oval region of domain B. (J-L) Area Ir maps to the middle region of domain C. (M-O) Area Ml maps to the caudal domain B. Scale bar, 500 µm.

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