van Willigen J D, Schaafsma A, Broekhuijsen M L, Jüch P J
Department of Neurobiology and Oral Physiology, University of Groningen, The Netherlands.
Arch Oral Biol. 1992 Oct;37(10):779-88. doi: 10.1016/0003-9969(92)90111-k.
By comparing the results of force matching between the jaw and the thumbs, whether subjects have any knowledge about the magnitude of exerted forces irrespective of the motor system was studied. Subjects were asked to match isometric forces of their own choice exerted by flexion of one of the thumbs with the jaw, and the other way around. The results were compared with control experiments in which subjects matched forces exerted by flexion of one of the thumbs with the other thumb and vice versa. None of the subjects was able to match correctly in all experimental conditions. All subjects displayed inconsistent matching behaviour, showing a mixture of correct matching and mismatching. This holds both for absolute matches (in N), and for matches relative to the maximal forces. The results show that knowledge about the magnitude of exerted forces is different for the jaw and the thumbs. Sensations about isometric forces exerted by the jaw or the thumbs are different within each subject and from subject to subject.
通过比较下颌与拇指之间力匹配的结果，研究了受试者是否对所施加力的大小有任何与运动系统无关的认知。要求受试者将自己选择的通过弯曲一根拇指所施加的等长力与下颌所施加的力相匹配，反之亦然。将这些结果与对照实验进行比较，在对照实验中，受试者将一根拇指弯曲所施加的力与另一根拇指弯曲所施加的力相匹配，反之亦然。没有一个受试者能够在所有实验条件下都正确匹配。所有受试者都表现出不一致的匹配行为，既有正确匹配，也有不匹配。这在绝对匹配（以牛顿为单位）以及相对于最大力的匹配中均成立。结果表明，下颌和拇指对所施加力大小的认知是不同的。每个受试者以及不同受试者之间，下颌或拇指所施加等长力的感觉都是不同的。
