Zygomatic branch, which supplies the Zygomatic Arch.

颧弓分支，支配颧弓。

These neurons, when activated by seeing someone laugh, cause the contraction of our zygomatic muscles which are responsible for smiling.

这元在看到他人笑时被激活，从而引起我们的颧肌缩， 而颧肌正是负责微笑的肌肉。

This can end up causing Chvostek's sign, which is when facial muscles twitch after the facial nerve is lightly finger tapped 1 cm below the zygomatic process.

这最终会导Chvostek，在颧骨下方1cm处轻轻按压面，面部肌肉会发生抽搐。

The spontaneous firing of neurons also leads Chvostek's sign, which is when facial muscles twitch after the facial nerve is lightly finger tapped 1 cm below the zygomatic process.

元的自发放电也会产生Chvostek，就是在颧骨突起处下方1厘米处用手指轻轻敲打面后，产生面部肌肉抽搐的现象。