6. Methods Tetramethyl rhodamine(TMR) or horseradish peroxidase(HRP)retrograde tracing and biotinylated dextran amine(BDA) anterograde tracing techniques were used.

• 方法四甲基罗达明（TMR）或辣根过氧化物酶（HRP）逆行追踪和生物素葡聚糖胺（BDA）顺行追踪技术。收藏指正