The new method of brain potentials in children

人们早就知道，随着年龄的增长，运动的速度和准确性会下降。这被归因于注意机制的缺陷和处理资源的减少。然而，大多数ERP研究都是通过简单的刺激任务来完成的。在本研究中，我们采用了联合感觉辨别任务。有由日常生活中所经历的刺激所产生的综合感觉刺激。这项任务是通过视觉运动和听觉运动刺激以及三维图形来完成的。我们研究了P300、No-Go电位和由联合感觉辨别任务诱发的听-运动诱发电位。P300和No-Go电位：包括91名正常人和25名智障患者。年龄从3岁到17岁不等。三岁后，无动电位波形变为成人波形。P300潜伏期逐渐缩短，直至13岁。不动电位潜伏期年龄相关性显示，9岁前潜伏期快，13岁时潜伏期短。在25名精神相关儿童中，6名（24%）表现出超过2sd的延迟。听觉-运动诱发电位：波形由PO、N1、P1、N2、P2组成。在年龄较小的儿童中，所有五个电位的潜伏期都更长。潜伏期逐渐缩短至6 ~ 7岁。30%的智障儿童比同龄的正常人表现出更长的潜伏期。

It has been known for a long time that speed and accuracy of performance decline with advancing age. This has been attributed to deficits in attentional mechanisms and to diminished processing resouces. However, most of the ERP studies have been done by simple stimuli task. In this study we used the combined sensational discrimination task. There are combined sensational stimulus that have been done by stimuli experienced in daily life. This task has been done by visuo-motor and audio-motor stimuli and three dimentional figures.We studied P300, No-Go Potentials and audio-motor evoked potentials elicited by combined sensational discrimination task.P300 and No-Go Potentials : The subjects included 91 normals and 25 mentally retarded patients. The age ranged from 3 to 17 years old. The No-Go Potential waveforms became adult form after 3 years of age. The P300 latencies progressively shortened until 13 years old. The No-Go Potential latency-age correlation showed rapid latency till age 9 and shortest at age 13. Of 25 mentally relarded children, 6 (24%) showed prolonged latency beyond 2 S.D..Audio-motor evoked potentials : The waveform consisted to the components of PO,N1, P1, N2 and P2. The latencies of all five potentials were longer in younger children. The latencies progressively shortened until 6 to 7 years old. 30% of mentally retarded children showed prolonged latency as compared to the age matched normal subjects.