Figure 5. Histology of PrV and cortex from juvenile water shrews.

A. The organization of neocortex in the water shrew showing the dominance of the whisker representations in S1 and S2 (after [4]). B. A single flattened section of juvenile shrew neocortex showing the cytochrome oxidase-dense patch of tissue that marks the S1 representation of the whiskers. C. Barrelettes in PrV for the same shrew as illustrated for neocortex in B (section processed for cytochrome oxidase). D. A closer view of the neocortical whisker representation in shown in B. E–F. The flattened neocortex processed for cytochrome oxidase showing the whisker representation, and lack of barrels, for 2 additional juvenile cases. Scale bars  = 0.5 mm.