失语为高级皮质言语中枢损害而引起的表达、理解等方面的障碍。以大脑外侧裂为界，将此以前的病变引起的言语障碍称为“前部失语”，在此以后病变所致的言语障碍称“后部失语”［１］。临床上后部失语均有命名障碍、流利性言语、理解障碍及不同程度的复述障碍。在作“感觉性失语”、“命名性失语”及“传导性失语”时常易混淆，本文将以具体病例对上述问题进行讨论 Aphasia is a cortical speech center damage caused by the expression, understanding and other obstacles. To the lateral fissure of the brain as the boundary, the speech disorder caused by this previous lesion known as “anteriorpharyphalacrosis”, after which speech-induced disorders caused by “backward aphasia” [1]. Clinically posterior aphasia has naming disorder, fluent speech, understanding of obstacles and varying degrees of complications. In the “sensory aphasia,” “nominal aphasia,” and “conductive aphasia” are often confusing, this article will discuss the above issues with specific cases