Analysis of regulata of Jaw Motor System in Man

为了评价人的颌骨运动系统的运动规律，对声学信号控制的颌骨敲击运动和偏心位置持续自主咬合后的运动进行了运动学分析，结果如下：(1)在1.3赫兹恒频信号控制的重复敲击动作中，到第14次或第15次试验时，动作的早期学习过程几乎完成，随后是习惯化。(2)较大幅度的敲击动作的调整--应该通过“后续的绩效控制”来完成，在该过程中，将从上一次试验中获得有限的信息，在0.3、0.8、1.3、1.8、2.3和2.8赫兹恒定频率的重复指令信号中，0.3赫兹的指令信号似乎是评价习惯化的最合适的信号。(5)信号间隔随机的重复信号控制的咬合动作的早期学习过程较少。(6)偏心位置持续最大随意咬合30s的条件化后的敲击点向条件化侧偏移，后退式条件反射除外。(7)这种条件化效应在连续敲击30次的第1次或第2次试验中表现得更为明显。此外，在条件反射过程中，如果咬合接触侧与下颌偏斜侧重合，效果会增强。(8)上述结果为我们评估咀嚼运动系统的调节提供了基础数据。

In order to evaluate the regulata of jaw motor system in man, jaw tapping movement commanded by accoustic signal and the movement after conditioning by sustained voluntary clenching in eccentric jaw position were kinesiologically analyzed.The results obtained were as follows;(1) In Repetitive jaw tapping movenent commanded by signal of constant frequency of 1.3 Hz, an early learning proces of the movement would be almost accomplished by the time of the 14th or 15th trial, following by a habituation.(2) The large extent of adjustment of tapping movement-should be done by "a subsequent performance control" in which straged informations obtained from the past trial would be perticipated, and by "an instant performance control" in which efferent copy and peturning afferent signal concerned with the present trial would be contributed.(3) These two types of performance control should be essential to accomplish the task with iess consumption of motor enerby.(4) Among the repetitive command signals with 0.3, 0.8, 1.3, 1.8, 2.3 and 2.8 Hz constant frequencies, the signal of 0.3 Hz seemed to be the most suitable for an evaluation of the habituation. (5) Less early learning process was observed in jaw tapping movement commanded by the repetitive signal with random intersignal interval.(6) Tapping point just after condigioning by sustained maximum voluntary clenching for 30sec in eccentric positions was deviated for to the conditioning side, with the exception of the conditioning at retruded position.(7) This effect of the conditioning seemed to be clear in the lst or 2nd trial of a 30-sequential tapping. 「Furthermore, if the side of occlusal contact were coincident with the Jaw deviated side during the conditioning, the effect was enhanced.(8) The results mentioned above gave us the fundamental data to evaluate the regulata of the masticatory motor system.