Simpson R K, Chin L
Cleft Palate J. 1981 Jan;18(1):1-9.
This study examined velar stretch in 20 young, normal adults during the production of /alpha/,/epsilon/, and /u/, and during blowing. Velar length was measured from cephalometric x-rays in two ways: (1) along the nasal surface of the velum and (2) along the velar midline. Results show no significant differences in velar stretch between males and females. Using nasal surface measures, there was significantly greater stretch for /u/ and for blowing than for /alpha/ and /epsilon/. For midline measures, the only differences which reached statistical significance were between blowing and /alpha/ or /epsilon/, which were not different from each other. Correlations between need ratio and percentage of stretch were significant as were correlations between percentage of velar stretch (nasal surface measure) and velar height. Comparisons of the two methods of measuring velar length are presented followed by a discussion concerning the significance of the findings.
本研究检测了20名年轻正常成年人在发/α/、/ε/和/u/音以及吹气时软腭的伸展情况。通过头影测量X线片以两种方式测量软腭长度：(1)沿着软腭的鼻面；(2)沿着软腭中线。结果显示，男性和女性之间软腭伸展无显著差异。采用鼻面测量法时，发/u/音和吹气时的软腭伸展显著大于发/α/和/ε/音时。对于中线测量法，唯一具有统计学意义的差异存在于吹气与发/α/或/ε/音之间，而发/α/和/ε/音时的软腭伸展彼此无差异。需求比与伸展百分比之间的相关性显著，软腭伸展百分比（鼻面测量法）与软腭高度之间的相关性也显著。随后给出了两种测量软腭长度方法的比较，并对研究结果的意义进行了讨论。
