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目的评价通过B超测量面肌厚度的方法诊断面肌萎缩的可行性,并测量青年人面肌厚度的正常值,分析面肌厚度正常值的相关因素。方法选取34名健康青年志愿者,记录所有志愿者的年龄、性别、身高、体重及头围5种相关因素,用B超按设定方法测量每位志愿者双侧的额肌、降口角肌和降口唇肌,对测量结果及5种相关因素进行统计学分析。并从34名志愿者中随机选取5名,在1周后和2周后分别重复测量3组面肌,比较3次测量结果有无差异。结果 (1)34名志愿者经B超测量3组面肌厚度,双侧额肌、降口角肌和降口唇肌厚度无显著差异(P>0.05)。面肌厚度平均值为:额肌左侧(1.60±0.21)mm,右侧(1.62±0.22)mm;降口角肌左侧(2.60±0.50)mm,右侧(2.62±0.51)mm;降口唇肌左侧(1.51±0.23)mm,右侧(1.52±0.23)mm。(2)随机选取的五5名志愿者重复测量3次,3次面肌厚度测量结果相近,无统计学差异(P>0.05)。(3)按性别分组,女性18例,男性16例,组间比较:男性3组面肌厚度大于女性,差异有统计学意(P<0.05)。(4)体重指数与所测量的3块面肌厚度呈正相关性(P<0.05),额肌、降口角肌、降口唇肌与体重指数的相关系数分别为0.391、0.459及0.447;头围与面肌厚度无明显相关性。(5)选定的年龄段内(20~30岁)3组面肌厚度与年龄无相关性(P>0.05)。证明20~30岁年龄段的青年人,面肌厚度不受年龄影响,该年龄段人群面肌厚度具有相对稳定性。结论 (1)B超测量面肌厚度具有可重复性和很好的稳定性;(2)正常青年人(20~30岁)双侧额肌、降口角肌和降口唇肌厚度无明显差异;(3)不同性别的正常青年人(20~30岁)面肌厚度有明显差异,男性的额肌、降口角肌、降口唇肌均较女性厚;(4)正常青年人(20~30岁)面肌厚度跟体重指数呈正相关,也就是说越是肥胖的人面肌越厚,面肌厚度与头围无相关性。
Objective To evaluate the feasibility of measuring facial muscle atrophy by measuring the thickness of facial muscle by B-ultrasound and to measure the normal value of facial muscle thickness of young people and to analyze the related factors of normal facial muscle thickness. Methods 34 healthy young volunteers were selected to record the age, gender, height, weight and head circumference of 5 volunteers. B-ultrasound was used to measure the bilateral frontalis and hypothalamic muscles of each volunteer. And down lip muscle, the measurement results and five related factors for statistical analysis. Five of 34 volunteers were selected at random, and three groups of facial muscles were measured repeatedly after 1 week and 2 weeks respectively. The difference of 3 measurements was compared. Results (1) Thirty-four volunteers had no significant difference in thickness of bilateral facial muscles, hypothalamic muscle and lip-lip muscle measured by B-mode ultrasound (P> 0.05). The mean hemifacial thickness was 1.60 ± 0.21 mm in the frontal muscle and 1.62 ± 0.22 mm in the right frontal muscle, 2.60 ± 0.50 mm in the left side of the frontalis muscle and 2.62 ± 0.51 mm in the right side. Muscle left (1.51 ± 0.23) mm, right (1.52 ± 0.23) mm. (2) Five randomly selected five volunteers repeated measurements three times, three measurements of facial muscle thickness were similar, no statistical difference (P> 0.05). (3) According to sex, 18 women and 16 males were enrolled in this study. The comparison between groups showed that the thickness of facial muscle in 3 males was greater than that in females, the difference was statistically significant (P <0.05). (4) There was a positive correlation between body mass index and the measured thickness of the three facial muscles (P <0.05). The correlation coefficients of frontal muscle, hypothalamic muscle, descending lip muscle and body mass index were 0.391, 0.459 and 0.447 respectively. No significant correlation of facial muscle thickness. (5) There was no correlation between facial muscle thickness and age in the selected age group (20-30 years old) (P> 0.05). Prove 20 to 30 years of age young people, facial muscle thickness is not affected by age, facial muscle thickness in this age group has a relative stability. Conclusions (1) B-superficial measurement of facial muscle thickness with repeatability and good stability; (2) Normal young people (20 to 30 years old) bilateral frontalis, hypothalamic muscle and lip-down lip muscle thickness was no significant difference; (3) There were significant differences in facial muscle thickness among normal young people (20-30 years old) of different sexes. The frontal muscle, ) Thickness of facial muscles and body mass index was positively correlated, that is, the more obese facial muscles thicker, facial muscle thickness and head circumference no correlation.