Benson D F
Arch Neurol. 1977 Jun;34(6):327-31. doi: 10.1001/archneur.1977.00500180021004.
A variety of alexia has been demonstrated that can be distinguished from the two classically recognized types of alexia. This reading disorder is seen in patients with a dominant frontal lobe pathologic condition that has produced a motor language disturbance (Broca aphasia) and is sufficiently disabling to deserve consideration as a variety of alexia. Functionally, the frontal reading disturbance differs from the other two types in that the patient comprehends meaningful content words better than relational or syntactic structures. Four factors that may underly frontal alexia have been noted: (1) gaze paresis, (2) inability to maintain verbal sequences; (3) inability to comprehend syntactic structure, and (4) literal alexia.
已证实存在多种失读症，它们可与两种经典认可的失读症类型相区分。这种阅读障碍见于患有优势额叶病理状况的患者，该状况导致了运动性语言障碍（布罗卡失语症），且严重到足以被视为一种失读症类型。从功能上讲，额叶阅读障碍与其他两种类型的不同之处在于，患者对有意义的实词的理解比对关系结构或句法结构的理解更好。已注意到可能导致额叶失读症的四个因素：（1）凝视麻痹；（2）无法维持言语序列；（3）无法理解句法结构；（4）逐字失读症。
