Portnoy R A, Aronson A E
J Speech Hear Disord. 1982 Aug;47(3):324-8. doi: 10.1044/jshd.4703.324.
Rate and regularity of diadochokinetic syllable repetitions of /p/, /t/, and /k/ in 30 normal subjects, 30 subjects with spastic dysarthria, and 30 subjects with ataxic dysarthria were measured by computer. Normal subjects had rates (syllables per second) of 6.4, 6.1, and 5.7; spastic dysarthric subjects, 4.6, 4.2, and 3.5; and ataxic dysarthric subjects, 3.8, 3.9, and 3.4 for /p/, /t/, and /k/, respectively. Spastic and ataxic subjects were significantly slower and more variable than normal subjects and ataxic subjects were significantly more variable than spastic subjects. The significantly slower than normal rate of repetition in the ataxic subjects and the significantly more variable than normal rhythm of repetition in the spastic subjects were unexpected findings and are in contrast with results from perceptually based investigations of dysarthria. The study demonstrates that slowness of syllable repetition is not restricted to spastic dysarthria and that dysrhythmia of syllable repetition is not restricted to ataxic dysarthria, thus suggesting the need for additional quantitative measurements of acoustic features on which certain notions about the dysarthrias are currently based.
通过计算机测量了30名正常受试者、30名痉挛性构音障碍受试者和30名共济失调性构音障碍受试者发/p/、/t/和/k/音时的重复音节速率和节律。正常受试者发/p/、/t/和/k/音时的速率（每秒音节数）分别为6.4、6.1和5.7；痉挛性构音障碍受试者分别为4.6、4.2和3.5；共济失调性构音障碍受试者分别为3.8、3.9和3.4。痉挛性和共济失调性受试者比正常受试者明显更慢且变化更大，共济失调性受试者比痉挛性受试者变化更大。共济失调性受试者的重复速率明显低于正常水平，而痉挛性受试者的重复节律比正常情况明显更不稳定，这些意外发现与基于构音障碍感知研究的结果相反。该研究表明，音节重复缓慢并不局限于痉挛性构音障碍，音节重复节律异常也不局限于共济失调性构音障碍，因此表明需要对某些目前关于构音障碍的概念所基于的声学特征进行额外的定量测量。
