Of the three types of tic disorders, Tourette's is considered to be the most severe.

Tourette综合征是三种抽动障碍中最严重的一种。

Alright, as a quick recap, tic disorders are repetitive, non-voluntary movements or vocalizations that appear before the age of 18.

得！快速回顾一下：抽动是一种重复的、非自主的动作或发声，常在18岁前出现。

There is no cure for tourette's and other tic disorders, but tics can be managed through a combination of therapy and medications.

包括Tourette综合征在内的所有抽动障碍无法治愈，不过在药物和人为干预下，抽动可以被控制。

In addition to having a tic, there are three additional criteria that are used to help classify individuals into one of the three types of tic disorders.

除了抽动，还有三条诊断标准值得关注：这些标准用来确定患者属于抽动障碍中的哪一种。

For a diagnosis of persistent motor or vocal tic disorder, also called chronic tic disorder, an individual must have either a single or multiple motor tics or vocal tics —but not both.

而要确诊慢性抽动障碍，即持续性动作或发声抽动，患者只需满足存在动作或发声性抽动的其中之一，不必两个兼具。

Criteria A is the number of motor or vocal tics, criteria B is the duration of the tic disorder, and criteria C is the age of the person when he or she started having tics.

标准A是抽动种类的数量，标准B是抽动障碍的病程长短，标准C是患者的发病时间。