Figure 4.

ChAT-labeled axons coursing from the inserted nerve (asterisk), into the intermediate zone and ventral horn. The clear area adjacent to the asterisk is a sectioning artifact. A dense band of ChAT-labeled regenerating axons (arrow) courses toward the intermediate zone and motor nucleus. Single ChAT-labeled axons contain large varicosities, which are seen at higher magnification in the inset (arrows). The darkly labeled neurons at the bottom of section are lumbar motoneurons. Scale bar, 200 μm; inset, 100 μm.