Kapur N, Lawton N F
J Neurol Neurosurg Psychiatry. 1983 Jun;46(6):573-5. doi: 10.1136/jnnp.46.6.573.
A case of pure dysgraphia is presented in which the patient could accurately copy letters which she could not write. The patient did not show any evidence of significant reading or speech impairment or any buccofacial or limb apraxia. Both oral and "block spelling" performance were intact. The writing impairment, which was bilateral, appeared to consist of a memory difficulty for the motor movements associated with letters. The dysgraphia was shown to be specific to letters as the patient was able to transcribe certain numbers and patterns which were similar to letters in their visuospatial complexity. It is suggested that dysgraphia for letters may represent a specific type of motor memory deficit, dissociable from copying skills and the ability to draw letter-like forms.
本文报告了一例纯失写症病例，该患者能够准确临摹字母，但却无法书写这些字母。患者没有表现出任何明显的阅读或言语障碍，也没有任何口面部或肢体失用症。口语和“分组拼写”能力均正常。双侧存在的书写障碍似乎是由于对与字母相关的运动动作存在记忆困难。由于患者能够抄写某些在视觉空间复杂性上与字母相似的数字和图案，因此证明失写症是字母特有的。有人认为，字母失写症可能代表一种特定类型的运动记忆缺陷，与临摹技能和绘制类似字母形式的能力无关。
