Neurofibrae preganglionicae

例句：

1. 1. The neurons in the brain are connected by preganglionic fibers.
   大脑中的神经元通过神经节前纤维相互连接。
2. 2. The preganglionic fibers carry impulses from the spinal cord to the brain.
   神经节前纤维将来自脊髓的冲动传递到大脑。
3. 3. In this study, we focused on the role of preganglionic fibers in synaptic transmission.
   在这项研究中，我们关注了神经节前纤维在突触传递中的作用。