Dalston R M, Seaver E J
Department of Surgery, School of Medicine, University of North Carolina, Chapel Hill 27599-7450.
Cleft Palate J. 1990 Jan;27(1):61-7. doi: 10.1597/1545-1569(1990)027<0061:napmor>2.3.co;2.
The temporal relationship among laryngeal, velopharyngeal, and labial activity was investigated by studying the reaction times of eight normal adults. Four female and four male subjects sustained production of the nasal consonant /m/ until a computer-driven imperative tone was presented at which time they were required to say /pi/ as quickly as possible. This task was repeated 30 times for each subject. The offset of voicing at the end of the /m/ and the onset of bilabial plosive release were monitored using a commercially available Nasometer. The onset of velopharyngeal (V-P) movement toward closure and the attainment of closure were monitored using a photodetector system. Across 240 responses, the average latencies were: 146 ms for initiation of V-P movement toward closure, 224 ms for voicing offset, 280 ms for onset of V-P closure and 317 ms for onset of plosive release. The significance of these findings is discussed with respect to speech motor control and the clinical evaluation of patients with velopharyngeal impairments.
通过研究八名正常成年人的反应时间，对喉部、腭咽和唇部活动之间的时间关系进行了调查。四名女性和四名男性受试者持续发出鼻辅音/m/，直到出现计算机驱动的命令音，此时要求他们尽快说出/pi/。每个受试者重复此任务30次。使用市售的鼻音计监测/m/结尾处的发声停止和双唇爆破音释放的开始。使用光电探测器系统监测腭咽（V-P）向闭合运动的开始和闭合的实现。在240次反应中，平均潜伏期分别为：腭咽向闭合运动开始为146毫秒，发声停止为224毫秒，腭咽闭合开始为280毫秒，爆破音释放开始为317毫秒。就言语运动控制和腭咽功能障碍患者的临床评估对这些发现的意义进行了讨论。
