Psychophysiological research of auditory responses in the severely and profoundly mentally retarded : Maltidimensional assessment by auditory brainstem response, slow vertex response, and variables of autonomic functions

严重重度智力低下者对环境刺激的反应能力较弱。本研究对重度深度智力低下者的三种听觉诱发电位(听性脑干反应、中潜伏期反应和慢顶反应)和心理生理功能的一些变量(心率、呼吸频率、眼动等)进行了研究。主要结果如下：1.许多深度智力低下者具有较高的听阈值(30dBNHL以上)，这是由ABR(V波)阈值决定的。2.许多SMR患者的诱发电位峰潜伏期和ABR I-V峰间潜伏期延长。3.在生活情境中，HR对刺激的时相下降反应随发展而增加。4.在未出现时相性HR反应的SMR中，观察到对环境的强直性HR反应(HR变化的延伸)。5.有严重脑干功能障碍的患者未观察到HR对环境的活动。

Severly and profoundly mentally retarded persons (SMRs) show a weak responsiveness to enviromental stimuli.In this project, three auditory evoked potentials ( auditory brainstem response, middle latency response, and slow vertex response ) and some variables of psychophysiological functions ( heart rate,respiration rate, eye movement,and so on ) were studied in SMRs.The main results were as follows: 1. Many SMRs had the higher auditory threshold (above 30dB nHL), as determineded by the threshold of ABR (wave V). 2. Peak latencies of evoked potentials and ABR I-V interpeak latencies were prolonged in many SMRs. 3. The phasic descending HR responses to stimuli in living situation increased with development. 4. In the SMRs who didn't show phasic HR responses, tonic HR responses(extention of HR change) to enviroment were observed. 5. The HR activity to enviroment couldn't be observed in persons who had sever brainstem dysfunction.