FIGURE 11.

Lmx1a mRNA labeling. DAB in situ hybridization revealed the distribution of Lmx1a expression at four, successive rostral‐to‐caudal sections through the PB region. Approximate level caudal to bregma is shown at bottom right (in mm). Black arrowhead (a) highlights the KF region. Translucent highlights identify the scp and boundaries between the brainstem surface and cerebellum. Mauve arrowheads (b, c) highlight dense Lmx1a labeling in a region homologous to the “external lateral” subnucleus in rats (Fulwiler & Saper, 1984). Scales bar in (a) is 200 μm and applies to all panels. Abbreviation: mcp, middle cerebellar peduncle