Dalston R M, Keefe M J
Department of Surgery, University of North Carolina, Chapel Hill 27514.
Cleft Palate J. 1988 Jul;25(3):203-9.
The relationship between inherent speed limitations of the velopharyngeal mechanism and the observed phenomenon of assimilation nasality was investigated by studying the reaction times of 10 normal adults performing three movements: (1) lip closing, (2) velopharyngeal closing, and (3) pressing a response key with a finger. The first two movements were monitored using a photodetector system. Across nearly 300 responses for each of the motor responses, the average reaction times, in milliseconds, were 194 for the digital, 203 for the labial, and 206 for the velopharyngeal movements. An analysis of variance revealed no consistent differences among these responses. The significance of these data is discussed with respect to speech motor control and clinical evaluation of patients with velopharyngeal impairments.
通过研究10名正常成年人执行三种动作的反应时间，对腭咽机制的固有速度限制与观察到的同化鼻音现象之间的关系进行了调查：（1）唇部闭合，（2）腭咽闭合，以及（3）用手指按下响应键。前两个动作使用光电探测器系统进行监测。在对每个运动反应进行的近300次反应中，数字反应的平均反应时间为194毫秒，唇部反应为203毫秒，腭咽运动反应为206毫秒。方差分析显示这些反应之间没有一致的差异。针对言语运动控制和腭咽功能障碍患者的临床评估，对这些数据的意义进行了讨论。
