Temple C M, Jeeves M A, Vilarroya O O
Developmental Neuropsychology Unit, Royal Holloway and Bedford New College, Egham, Surrey, United Kingdom.
Brain Lang. 1990 Aug;39(2):235-53. doi: 10.1016/0093-934x(90)90013-7.
It has been suggested that deficits in explicit phonological processing are causal in developmental dyslexia. Deficits in such skills have been reported in developmental phonological dyslexia, though not in developmental surface dyslexia. The reading performance of two children with callosal agenesis, who have been previously shown to have impairments on rhyming tasks, are reported. Neither child is dyslexic in the traditional sense, since word reading levels are appropriate for age. However, both children have impaired development of the phonological reading route despite normal lexical skills. The pattern of their reading is therefore comparable to developmental phonological dyslexia. Problems in explicit phonological processing may be causal in the failure to establish an efficient phonological reading route but this is insufficient to create difficulty with word recognition itself. The corpus callosum may be essential for the normal development of a phonological reading route.
有人提出，显性语音处理缺陷是发育性阅读障碍的病因。虽然发育性语音阅读障碍患者存在此类技能缺陷，但发育性表层阅读障碍患者却没有。本文报告了两名胼胝体发育不全儿童的阅读表现，此前已证明他们在押韵任务上存在障碍。从传统意义上讲，这两名儿童都没有阅读障碍，因为单词阅读水平与年龄相符。然而，尽管词汇技能正常，但两名儿童的语音阅读途径发育都受损。因此，他们的阅读模式与发育性语音阅读障碍相当。显性语音处理问题可能是未能建立有效语音阅读途径的原因，但这并不足以导致单词识别本身出现困难。胼胝体对于语音阅读途径的正常发育可能至关重要。
