Crary M A, Heilman K M
University of Florida Health Science Center, Gainesville.
Brain Lang. 1988 May;34(1):147-56. doi: 10.1016/0093-934x(88)90128-9.
Pure apraxic agraphia is a condition in which motor writing is impaired but limb praxis and nonmotor writing (typing, anagram letters) are preserved. This condition is believed to result from disruption of a parietal lobe graphemic area which generates grapheme representations used to program motor-writing patterns. We report a single case of pure apraxic agraphia in which defective letter imagery was evident. Results of writing and imagery evaluations suggest that the graphemic area may be responsible for generating letter images. In this respect, clinical evaluation of letter imagery abilities in cases of apraxic agraphia may be useful in identifying subtypes of the disorder resulting in a better understanding of the neuropsychological process involved in writing.
纯失用性失写症是一种运动书写受损但肢体运用能力和非运动书写（打字、字谜游戏）保留的病症。这种病症被认为是由于顶叶字素区中断所致，该区域产生用于规划运动书写模式的字素表征。我们报告了一例纯失用性失写症的单一病例，其中明显存在字母意象缺陷。书写和意象评估结果表明，字素区可能负责生成字母图像。在这方面，对失用性失写症病例的字母意象能力进行临床评估，可能有助于识别该病症的亚型，从而更好地理解书写过程中涉及的神经心理过程。
