The investigation of the perception of the position where the somatosensory information changes sharply with forward and backward leaning.

可以想到，基于具有前倾和后倾的体感信息的变化来感知前后方向上的站立位置。为了澄清以下三个问题，本研究对11名受试者进行了研究。1)当身体倾斜时，是否有可能准确地感知足部压力和肌肉活动的急剧变化？2)当脚底的特定部位被冷却以使压力感觉不那么敏感时，对足部压力和肌肉活动的急剧变化的感知是如何变化的？3)当通过冷却第一脚趾或第一跖骨头来减少压力感觉信息时，足底特定部位的压力强度感觉如何变化？结果和讨论：所有受试者均能感觉到第一跖骨头压力的最大值，但不能感觉到第一足趾压力的早期急剧增加，而错误地感觉到第一足趾压力的后期急剧增加。 ...更多信息 E是早期的。在对拇展肌、股直肌和胫骨前肌活动的感知中，11名受试者中有8名将后者的急剧增加误认为是早期的。得到的建议如下。第一趾压力和拇展肌活动的急剧增加与第一跖骨头达到最大值后压力从第一跖骨头向第一趾转移有关。第一跖骨头压力的压力感觉强烈地参与了第一脚趾压力的后一急剧增加的感知。第一足趾的压迫感参与了后一波拇展肌的急剧增长。股直肌活动知觉与足跟压力信息的关系存在个体差异。另一方面，胫骨前肌有少量。为了感知第一脚趾压力的强度，来自第一脚趾的压力信息在第一脚趾压力上升的位置变得重要，并且来自第一跖骨头的压力信息在压力从第一跖骨头转移到第一脚趾的位置变得重要。要感知第一跖骨头的压力强度，来自第一跖骨头的压力信息从低到高是重要的。少

It is conceivable that standing position in the antero-posterior direction is perceived based on the change of the somatosensory information with forward and backward leaning. To clarify the following three problems, this research was executed for 11 subjects. 1) Is it possible to perceive accurately a sharp change in foot pressure and muscle activity with the body leaning? 2) How does the perception of a sharp change in foot pressure and muscle activity vary when a specific part of foot sole is cooled to make the pressure sensation less sensitive? 3) How does the perception of pressure intensity in a specific part of foot sole vary when information of pressure sensation is reduced by cooling the first toe or the first metatarsal head? Results and discussion : All of the subjects were able to perceive the maximal value of the first metatarsal head pressure, but they were not able to perceive the early sharp increase of the first toe pressure, they mis-perceived the latter sharp increas … More e for the early one. In the perception of the activities of abductor hallucis, rectus femoris, and tibialis anterior, eight out of 11 subjects mis-perceived the latter sharp increase for the early one. The suggestions were obtained as follows. The latter sharp increase of the first toe pressure and abductor hallucis activity related to the pressure shifting from the first metatarsal head to the first toe after the first metatarsal head reaching the maximal value. The pressure sensation from the first metatarsal head pressure strongly took part in the perception of the latter sharp increase of the first toe pressure. The pressure sensation from the first toe took part in the latter sharp increase of abductor hallucis. There were individual variations of the relationship with pressure information from the heel in the perception of rectus femoris activity. On the other hand, there was a few in tibialis anterior. To perceive intensity of the first toe pressure, the pressure information from the first toe became important in a position where the first toe pressure rose, and the pressure information from the first metatarsal head became important in a position where the pressure shifted from the first metatarsal head to the first toe. To perceive intensity of the first metatarsal head pressure, the pressure information from the first metatarsal head ranging from low pressure to high was important. Less