对１０２例弱智儿进行脑干听觉诱发电位检测，结果表明，８２．３５％的弱智儿童听觉诱发电位异常，主要表现为Ｖ波潜伏期，Ⅲ－Ｖ波间潜伏期延长，Ｖ波振幅降低。其中７８例行脑ＣＴ检查，异常率８９．２％，主要改变为脑萎缩。研究认为，脑干听觉诱发电位可作为智力低下早期诊断的客观指标之一。 The brainstem auditory evoked potentials were detected in 102 cases of mentally retarded children. The results showed that 82.35% of the mentally retarded children had abnormal auditory evoked potentials. The main manifestations were V-wave latency, prolongation of latency between Ⅲ-V and V-wave amplitude reduction. Among them, 78 cases underwent brain CT examination, the abnormal rate was 89.2%, the main change was brain atrophy. Studies suggest that brainstem auditory evoked potentials can be used as one of the objective indicators of early diagnosis of mental retardation.