Research Article

The Delayed-Onset Mechanical Pain Behavior Induced by Infant Peripheral Nerve Injury Is Accompanied by Sympathetic Sprouting in the Dorsal Root Ganglion

Figure 4

TH-IR (red) fiber sprout around the neurons or axons expressing NF-200 (green) in adult rats (a) but not in pups (b) at postoperative day 7. Arrows: the sprouting TH-IR fibers. Scale bars: 50 μm.