Analysis of regulata of Jaw Motor System in Man

为评价人类下颌运动系统的调节规律，从运动学角度分析了由声信号指挥的下颌叩击运动和偏颌位持续自觉握紧调节后的运动。所得结果如下：(1)在1.3 Hz恒频信号指令下的重复敲颚动作中，在第14次或第15次试验时，该动作的早期学习过程基本完成，随后进入习惯化阶段。(2)敲击动作的大范围调整应该通过“后续性能控制”来完成，在“后续性能控制”中，从过去的试验中获得的存储信息将被预见，并通过“即时性能控制”来提供与当前试验有关的传出副本和反转传入信号。(3)这两种类型的性能控制应该是必不可少的，以较少的电机能量消耗来完成任务。(4)在0.3、0.8、1.3、1.8、2.3和2.8 Hz恒定频率的重复指令信号中，以0.3 Hz的重复指令信号最适合用于习惯化评价。(5)在随机信号间隔的重复信号下，敲击下颚动作的早期学习过程较少。(6)除收缩体位外，偏心体位持续最大自主握拳30秒调理后的叩击点均向调理侧偏移。(7)在30次连续敲击的第一次或第二次实验中，条件作用的效果似乎很明显。此外，如果在调节过程中咬合接触侧与下颌偏侧重合，则效果增强。(8)上述结果为我们评价咀嚼运动系统的调节规律提供了基础数据。

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.