No positive labeled nerve fiber could be viewed in the matched control nerve or the nerve injected with 0.1%BDA solution by way of either histochemistry technique(light microscopy) or confocal microscopy.

• BDA用于正常周围神经局部轴突运输的观察：（1）光镜观察：BDA注射点标记阳性的神经纤维呈褐紫色标记，髓鞘染色，轴突亦染色，髓鞘与轴突界限明显。 对照组无阳性标记的神经纤维。