Table 1. ED⁵⁰(mm) Values of Growth Cone Collapsing Effects of Tetracaine

At 60 min and 24 h after the application of tetracaine, ED⁵⁰values were significantly different among three neuronal tissue types (P < 0.05). The concentration of nerve growth factor (NGF) in culture media did not influence the ED⁵⁰values. Values are mean ± SD.

DRG = dorsal root ganglia.