Thompson E C, Murdoch B E, Stokes P D
Motor Speech Research Unit, University of Queensland, Australia.
Eur J Disord Commun. 1995;30(4):451-66. doi: 10.3109/13682829509087244.
The lip function of 16 speakers with upper motor neuron damage following cerebrovascular accident (CVA), was investigated using instrumental measures. Sixteen, non-neurologically impaired adults matched for age and sex served as controls. The results of the instrumental investigations revealed that the CVA speakers had patterns of lip function that were significantly different from the control speakers. Specifically, on maximum force tasks, the CVA speakers were found to produce significantly lower maximum lip force values. Maximum rate of attempts at lip movement was also slower in the CVA speakers. In addition, the instrumental investigation revealed that the CVA speakers demonstrated a significant decline in pressure over the course of the task involving 10 attempts at maximum lip force. In contrast, the control speakers maintained a consistent level of force throughout the 10 repetitions/attempts. Overall, the findings suggest that the CVA speakers have deficits in maximum lip force, endurance of lip strength and rate of lip movements. Correlations conducted between instrumental measures of maximum lip strength and the perceptual ratings of overall intelligibility, precision of consonants, precision of vowels and length of phonemes revealed no significant relationship.
采用仪器测量方法，对16名脑血管意外（CVA）后出现上运动神经元损伤的受试者的唇部功能进行了研究。选取16名年龄和性别匹配、无神经功能障碍的成年人作为对照组。仪器测量结果显示，CVA受试者的唇部功能模式与对照组受试者有显著差异。具体而言，在最大力量任务中，CVA受试者产生的最大唇部力量值明显较低。CVA受试者唇部运动的最大尝试速率也较慢。此外，仪器测量还显示，在涉及10次最大唇部力量尝试的任务过程中，CVA受试者的压力显著下降。相比之下，对照组受试者在10次重复/尝试过程中保持了一致的力量水平。总体而言，研究结果表明，CVA受试者在最大唇部力量、唇部力量耐力和唇部运动速率方面存在缺陷。对最大唇部力量的仪器测量与整体可懂度、辅音清晰度、元音清晰度和音素长度的感知评分之间的相关性分析显示，两者之间无显著关系。
