To explore their pain resistance further, the researchers used a modified cold sore virus to carry genes for Substance P to just one rear foot of each tested rodent.

• 进一步探索它们对痛苦的抵抗力,研究员使用修饰的冷疮病毒运载物质P的基因对每只测试的鼹鼠的一只后脚实验。