Tic disorders are often most severe before puberty —between the ages of 10 and 12 —and usually decrease in severity afterwards.

抽动障碍往往在青春期前最严重，大概在10到12岁间，之后症状就会减缓。

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。

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。

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。

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。