著者

吉田 行宏 林 知也 矢野 忠

出版者

一般社団法人 日本温泉気候物理医学会

雑誌

日本温泉気候物理医学会雑誌 (ISSN:00290343)

巻号頁・発行日

vol.73, no.3, pp.177-190, 2010 (Released:2013-09-05)

参考文献数

40

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Aim  The study aimed to develop an appropriate in vivo rat model of muscle strain to investigate whether electroacupuncture is useful for improving muscle strain.Methods  An in vivo muscle strain model was developed with Wistar rats by the eccentric contraction (EC) evoked by pulling their hind limb with a stainless-steel wire that was connected to a weight; the EC was given under anesthesia during tetanic contraction in their gastrocnemius evoking by electrical stimulation of the sciatic nerve. Development of muscle strain was evaluated by comparing the muscle tension induced by the twitch of the gastrocnemius, pain thresholds measured using the Randall-Selitto test, and the serum creatine kinase (CK) activity between the following three experimental groups : EC×1 group, EC was temporarily evoked to their hind limb only once (n=10); EC×5 group, EC was temporarily evoked to their hind limb five times consecutively (n=6); and control group, EC was not evoked to their hind limb (n=6). After confirming the absence of a significant difference in the parameters between the two EC conditions, the effect of electroacupuncture (EA) was evaluated using the model of one-time EC (EA group n=10). At 12 hours after EC, EA was carried out at a frequency of 50 Hz and an intensity of 0.5 mA for 15 min; this stimulation was given for six consecutive days.Results  Muscle tension, pain thresholds, and the CK activity showed no remarkable changes in the control group during the experimental period. A significant decrease in the muscle tension was observed after EC in the EC×1 and EC×5 groups, and the decrease sustained until 48 and 24 hours after EC, respectively. Pain thresholds in the EC×1 and EC×5 groups were significantly lower than those in the control group at each of the time periods studied after EC, and were sustained at least until 120 hours after EC. The CK activity increased in the EC×1 and the EC×5 groups at 30 minutes after EC. Recovery in muscle tension after EC was faster in the EA group than in the EC×1 group. Pain thresholds also showed faster recovery in the EA group than in the EC×1 group, indicating statistically significant differences at 72, 96, and 120 hours after EC.Discussion  The in vivo rat model, which was developed in the present study, was considered to be an appropriate model of muscle strain because it clearly showed a decrease in the muscle tension and pain thresholds, and an elevation in the CK activity. EA was considered to be capable of accelerating the recovery of muscle strain as it was found to improve muscle tension and pain thresholds in the model.

著者

宮木 稜司 吉田 行宏 中村 剛士 加納 政芳 山田 晃嗣

出版者

日本知能情報ファジィ学会

雑誌

日本知能情報ファジィ学会 ファジィ システム シンポジウム 講演論文集 (ISSN:18820212)

巻号頁・発行日

vol.34, pp.288-291, 2018

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<p>近年、家庭やオフィスにRoombaに代表されるような掃除ロボットが普及されている。掃除ロボットは掃除作業を実行するロボットであるが、作業の妨げになるような障害物がある場合は人からの支援が必要となる。このとき、ロボットから人に対して支援を必要とする旨の意図伝達を行い、支援行動を喚起することができれば、タスクがよりスムーズに遂行できる。ロボットからの意図伝達を試みた研究に聴導犬ロボットAcToRの研究があり、接触を行うことで緊急性に関する意図を人に伝えられることが報告されている。本研究では、接触を行う対象を人だけでなく第3の物体にも適用することを提案する。ペットの犬はドアを開けてほしいときにドアを引っかくなどの動作を行うことがある。ロボットも同様の動作を行うことで意図伝達と行動喚起に効果があるのではないかと推測する。本実験では、実験室の外に出たいという意図の伝達と実験室のドアを開けてもらう行動の喚起の方法として「接触有り」と「接触無し」の2条件でそれぞれ実験を行い比較する。</p>