This is the myenteric plexus, also called as Auerbach's plexus, which when activated, causes smooth muscle relaxation.

如图所示为肌间神经丛，也称为奥尔巴赫神经丛；该神经丛激活时，可引起平滑肌舒张。

First there's the myenteric plexus, also known as Auerbach's plexus, which when activated, primarily causes smooth muscle relaxation.

第1个是肌间神经丛（Auerbach神经丛），当它兴奋时，平滑肌松弛。