Objective: To study the oropharyngeal sensory function by Current Perception Threshold(CPT) detection, to explore the detection method of oropharyngeal sensory function in normal population, and to analyze the possible influencing factors. Methods: Fifty-eight normal subjects were included prospectively in this study. Age, gender, body mass index (BMI) were collected. The age of the subjects ranged from 20 to 76 (43.27±13.52) years old. There were 34 females with 17 in childbearing period and 17 in menopause; and 24 males were included.In all the cases, 6 cases were in low BMI, 39 cases were in normal BMI, 10 cases were overweight and 3 cases were suffering from obesity. The CPT system of Neurometer was used to stimulate bilateral palatoglossal arch and tongue base.The current used was 2000 Hz, 250 Hz and 5 Hz respectively.The function of type Aβ, Aδ and C sensory nerve fibers were tested and the CPT values were recorded.The values were inversely proportional to pharyngeal sensation function.To evaluate the oropharyngeal sensory function of the subjects, the CPT values of each frequency at each testing point were compared. SPSS 25.0 software was used for statistical analysis. Results: The CPT value of palatoglossal arch was significantly lower than that of tongue base (t=-2.58,-2.65,-2.54,-2.47,-2.37,-2.77,P<0.05), 2 000 Hz>250 Hz>5 Hz, and there was no significant difference between left and right sides(t=-0.03,-0.51,-0.49,0.06,-0.16,0.13,P>0.05). The CPT value of male was slightly higher than that of female (t=0.92,1.55,0.27,0.78,1.44,1.26,0.35,0.77,1.27,0.24,0.78,0.96,P>0.05). The CPT values of women in childbearing period were significantly less than those in menopausal women (t=-3.90,-3.64,-2.14,-4.20,-4.28,-4.28,-3.52,-4.46,-3.41,-3.63,-4.66,-2.86,P<0.05). The CPT value increased with age, and the values of all frequency of 20 to 30 years old group was significantly lower than those of subjects over 40 years old at each point (The t values of bilateral palatoglossal arch at 2 000 Hz were -5.57,-6.22,-10.18,-11.00;the t values of bilateral palatoglossal arch at 250 Hz were -6.39,-8.79,-6.39,-15.61;the t values of bilateral palatoglossal arch at 5 Hz were -7.09, -5.57, -9.26, -15.23;the t values of tongue base at 2 000 Hz were -3.11,-3.88,-7.60,-8.55;the t values of tongue base at 250 Hz were -6.31,-10.59,-8.52,-10.60;the t values of tongue baseat 5 Hz were -6.69,-5.09,-8.70,-7.07,P<0.05).The values at all frequencies and testing points of 30-40 years old group were significantly lower than those of all subjects over 60 years old (The t values of bilateral palatoglossal arch at 2 000 Hz were -10.91,-12.42;the t values of bilateral palatoglossal arch at 250 Hz were -6.25,-10.87;the t values of bilateral palatoglossal arch at 5 Hz were -5.53,-11.01;the t values of tongue base at 2 000 Hz were -8.62,-10.12;the t values of tongue base at 250 Hz were -6.89,-7.82;the t values of tongue base at 5 Hz were -6.13,-6.48,P<0.05). Conclusions: CPT can be used to evaluate oropharyngeal sensory function. The sensitivity of tongue base is lower than that of palatoglossal arch, there is no significant difference in oropharyngeal sensory function between male and female,between left and right sides. There are many factors influencing oropharyngeal sensory function. Age, hormone level changes may affect the sensitivity of oropharyngeal sensory function.
目的： 通过电流感觉阈值（Current Perception Threshold，CPT）检测研究口咽部感觉功能，探讨正常人口咽部感觉功能检测方法，并分析可能对其产生影响的因素。 方法： 前瞻性纳入58例正常受试者，收集年龄、性别和体质量指数（BMI）的信息。受试者年龄20~76（43.27±13.52）岁，其中男性24例，女性34例（育龄期17例，绝经期17例）。BMI：偏轻6例，正常39例，超重10例，肥胖3例。使用Neurometer CPT系统，以2 000 Hz、250 Hz及5 Hz频率的电流刺激受试者双侧腭舌弓及舌根并记录CPT值，分别评估受试者咽部Aβ、Aδ和C类感觉神经纤维的功能，CPT数值大小与咽部感觉功能成反比。比较各位点各频率的CPT值，评价受试者的口咽部感觉功能。采用SPSS 25.0软件进行统计学分析。 结果： 与舌根部CPT值（以2 000 Hz、250 Hz及5 Hz频率刺激）相比，左侧腭舌弓CPT值（t值分别为-2.58、-2.65、-2.54）和右侧腭舌弓CPT值（t值分别为-2.47、-2.37、-2.77）均明显降低（P<0.05），左右侧间无明显差异（t=-0.03、-0.51、-0.49、0.06、-0.16、0.13，P>0.05）。男性各位点各频率的CPT值均高于女性，但差异无统计学意义（t=0.92、1.55、0.27、0.78、1.44、1.26、0.35、0.77、1.27、0.24、0.78、0.96，P>0.05）。与育龄期妇女的CPT值（以2 000 Hz，250 Hz及5 Hz频率刺激）相比，绝经期妇女左侧腭舌弓（t值分别为-3.90、-3.64、-2.14）、右侧腭舌弓（t值分别为-4.20、-4.28、-4.28）、左侧舌根（t值分别为-3.52、-4.46、-3.41）、右侧舌根（t值分别为-3.63、-4.66、-2.86）的CPT值明显升高（P<0.05）。随着年龄增长，双侧腭舌弓、舌根处的CPT值增加，其中20~30岁组在各位点各频率的CTP值明显低于所有40岁以上的4组受试者（双侧腭舌弓2 000 Hz时的t值依次为-5.57、-6.22、-10.18、-11.00，双侧腭舌弓250 Hz时的t值依次为-6.39、-8.79、-6.39、-15.61，双侧腭舌弓5 Hz时的t值依次为-7.09、-5.57、-9.26、-15.23，舌根2 000 Hz时的t值依次为-3.11、-3.88、-7.60、-8.55，舌根250 Hz时的t值依次为-6.31、-10.59、-8.52、-10.60，舌根5 Hz时的t值依次为-6.69、-5.09、-8.70、-7.07，P均<0.05）；30~40岁组在各位点各频率的CPT值明显低于所有60岁以上的2组受试者（双侧腭舌弓2 000 Hz时的t值依次为-10.91、-12.42，双侧腭舌弓250 Hz时的t值依次为-6.25、-10.87，双侧腭舌弓5 Hz时的t值依次为-5.53、-11.01，舌根2 000 Hz时的t值依次为-8.62、-10.12，舌根250 Hz时的t值依次为-6.89、-7.82，舌根5 Hz时的t值依次为-6.13、-6.48，P均<0.05）。 结论： CPT检测可用于评估口咽部感觉功能，舌根感觉敏感度低于腭舌弓；正常人左右两侧之间及男女性之间口咽部感觉功能无明显差异，口咽部感觉功能影响因素较多，年龄、激素水平变化可能影响口咽部感觉的敏感性。.