Vater D
Psychiatr Neurol Med Psychol (Leipz). 1976 Oct;28(10):590-4.
The history of a case of mutism, where the patient had been silent for more than twenty-five years, caused by the author to study and discuss this relatively infrequent catatonic symptom which is a type of schizophrenia, with frequent references being made to the results of psychiatric studies made by authors ranging from Kahlbaum to Leonhard. Permanent mutism as a possible phenomenal form was logically classified, by Leonhard, as a type of mannered catatonia.
一个缄默病例的病史，该患者已经沉默超过二十五年，促使作者研究并讨论这种相对罕见的紧张症症状（它是精神分裂症的一种类型），文中频繁提及从卡尔鲍姆到莱昂哈德等作者所做的精神病学研究结果。莱昂哈德从逻辑上将永久性缄默作为一种可能的现象形式归类为一种做作型紧张症。
