【摘要】：研究目的:通過計算分析人體足底壓力中心(Centre Of Pressure,COP)數據的時域和頻域指標,研究人體在前庭功能干擾下的直立穩(wěn)定性。并通過頻域指標定量分析不同前庭功能干擾方式(頭部位置狀態(tài)、坐位旋轉)下的直立穩(wěn)定性差異和在各方式下視覺、前庭覺、本體感覺之間的代償機制,為前庭功能患者的康復和航天航空飛行員的選拔提供參考。研究方法:根據實驗要求選取20名健康青年男性作為本次實驗的受試者,受試者自愿參加本實驗,但對實驗目的并不知情。利用Kistler測力臺采集受試者在頭部前屈、頭部后伸、頭部左傾、頭部右傾狀態(tài)下和不同坐位旋轉轉速(每秒60、90、180度)后的COP數據,所有實驗均在受試者閉眼狀態(tài)下完成。采集的數據以ASCII格式、矩陣的形式輸出到文本文檔中,經編寫的MATLAB運算程序計算后得到相關的生物力學指標,采用單因素方差分析對不同狀態(tài)下的指標進行比較。研究結果:(1)頭部不同位置狀態(tài)下時域指標:(1)COP前后方向上的直立穩(wěn)定性指標結果比較表明頭部前屈狀態(tài)下人體直立穩(wěn)定性與頭部豎直狀態(tài)無顯著性差異;而頭部后伸狀態(tài)下人體直立穩(wěn)定性較頭部豎直狀態(tài)差,且有顯著性差異;頭部左傾和頭部右傾狀態(tài)下人體直立穩(wěn)定性較頭部豎直狀態(tài)無顯著性差異;(2)COP左右方向上的指標結果比較表明頭部前屈和頭部后伸狀態(tài)下人體直立穩(wěn)定性較頭部豎直狀態(tài)無顯著性差異,而頭部左傾和頭部右傾狀態(tài)下人體直立穩(wěn)定性較較頭部豎直狀態(tài)差,且有顯著性差異;(2)頭部不同位置狀態(tài)下與各感覺信息相關信號的頻域指標:閉眼狀態(tài)下視覺信息和小腦信息不受頭部位置狀態(tài)的影響,(1)與各感覺信息相關信號前后方向上的指標結果比較表明頭部后伸會導致前庭覺信號較本體感覺信號有相反的指標特性;(2)與各感覺信息相關信號左右方向上的指標結果比較表明頭部左傾和頭部右傾都會導致前庭覺信號較本體感覺信號有相反的指標特性;(3)不同坐位旋轉轉速下時域指標:COP各方向上的指標結果比較表明隨著轉速的增加人體直立穩(wěn)定性下降,且有顯著性差異,但每秒60度轉速下人體直立穩(wěn)定性較無旋轉無顯著性差異;(4)不同坐位旋轉轉速下與各感覺信息相關信號的頻域指標:閉眼狀態(tài)下視覺信息不受坐位旋轉的影響,而小腦信息會受坐位旋轉的影響,(1)與各感覺信息相關信號前后方向上的指標結果反映出僅有在每秒180度轉速下前庭覺信號較本體感覺信號有相同的指標特性;(2)與各感覺信息相關信號左右方向上的指標結果比較得出各轉速下前庭覺信號較本體感覺信號有相同的指標特性。研究結論:(1)頭部前屈不會導致青年健康人群直立穩(wěn)定性下降;頭部在矢狀面內的位置狀態(tài)改變只會使人體在矢狀軸上的直立穩(wěn)定性降低,而頭部在額狀面內的位置狀態(tài)改變只會使人體在額狀軸上的直立穩(wěn)定性下降;(2)人體額狀軸上的直立穩(wěn)定性較矢狀軸更易受半規(guī)管壺腹嵴前庭覺干預方式的影響而降低,每秒60度坐位旋轉20s不足以導致青年健康人群直立穩(wěn)定性下降。(3)半規(guī)管壺腹嵴前庭覺干預方式對前庭覺信息的干擾比囊斑前庭覺干預方式大。在人體前庭功能受干擾的狀態(tài)下本體感覺信息會代償前庭覺信息的饋乏。
[Abstract]:Objective: To study the vertical stability of human body under the disturbance of vestibular function by calculating the time domain and frequency domain index of the data of the center of foot pressure (COP) of human body. and the difference of the vertical stability under different vestibular function interference modes (the head position state and the sitting rotation) and the compensation mechanism between the vision, the vestibular sensation and the proprioception in each mode are quantitatively analyzed through the frequency domain index, And provides a reference for the rehabilitation of the vestibular function patients and the selection of the space aviation pilots. Study method:20 healthy young men were selected as subjects in this experiment according to the requirements of the experiment, and the subject voluntarily participated in the experiment, but did not know the purpose of the experiment. The COP data of the subject at the head, the head, the left, the head right, and the different sitting rotational speeds (60,90,180 degrees per second) were collected using the Kistler force cell, all of which were completed in the subject's closed-eye condition. The acquired data is output to a text document in the form of an ASCII format and a matrix, and the relevant biomechanical indexes are obtained after being calculated by the written MATLAB calculation program, and the indexes of different states are compared by a single-factor analysis of variance. Results: (1) The time domain index in different position of the head: (1) The results of the vertical stability index in the front and back direction of the head show no significant difference between the standing stability of the human body and the vertical state of the head in the pre-bending state of the head; and the vertical stability of the human body under the condition of the head left and the right inclination of the head has no significant difference between the vertical state of the head and the vertical state of the head; (2) The results of the index in the left and right direction of COP showed no significant difference between the vertical stability of the head and the vertical state of the head under the condition of the head and the head, while the vertical stability of the head in the left and the right of the head was lower than that of the head, and there was a significant difference. (2) the frequency-domain index of the signal related to the sensory information in different position states of the head: the visual information and the cerebellar information in the closed-eye state are not affected by the state of the head position, (1) The comparison of the index results in the fore-and-aft direction of the signal related to the sensory information indicates that the extension of the head can cause the vestibular sensory signal to have the opposite index characteristic with respect to the proprioceptive signal of the body; and (2) comparing the index results in the left and right directions of the signals related to the sensory information, indicating that the head left tilt and the head right tilt can cause the vestibular sensory signal to have the opposite index characteristic compared with the body sense signal; and (3) the time domain index at the rotating speed of the different sitting positions: The results of the indices in the direction of COP showed that the vertical stability of the human body decreased with the increase of the rotation speed, and there was a significant difference, but there was no significant difference in the upright stability of the human body at 60 degrees per second. (4) the frequency-domain index of the signal related to the sensory information at different sitting rotating speed: the visual information in the closed-eye state is not affected by the rotation of the sitting position, and the cerebellar information can be influenced by the sitting rotation, (1) The index results in the fore-and-aft direction of the signal related to each sensory information reflect that only the vestibular sensory signal has the same index characteristic at the rotation speed of 180 degrees per second; And (2) comparing the index results in the left and right directions of the signals related to the sensory information to obtain the same index characteristic of the sensory signals of the vestibular sensory signals at each rotating speed. The results of the study: (1) The prebending of the head does not lead to a decrease in the erect stability of the healthy population of the young; the change of the position of the head in the sagittal plane only reduces the vertical stability of the human body on the sagittal axis, while the change of the position state of the head in the frontal plane only reduces the vertical stability of the human body on the frontal axis, and (2) the vertical stability of the frontal axis of the human body is easier to be reduced by the effect of the half-regulation of the vestibular sensory intervention of the ampulla of the ampulla, A 60-degree seat rotation of 20 seconds per second is not sufficient to lead to a decrease in the standing stability of the young healthy population. (3) The disturbance of the vestibular sensory information on the vestibular sensory information of the semi-regulated ampulla of the ampulla is greater than that of the vestibular sensory intervention. In the condition that the vestibular function of the human body is disturbed, the sensory information of the body can compensate for the feeding of the vestibular sensory information.
【學位授予單位】：蘇州大學
【學位級別】：碩士
【學位授予年份】：2016
【分類號】：G804.6

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