| Project/Area Number |
17206022
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| Research Category |
Grant-in-Aid for Scientific Research (A)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Intelligent mechanics/Mechanical systems
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| Research Institution | The University of Tokyo |
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Principal Investigator |
MABUCHI Kunihiko The University of Tokyo, Graduate School of Information Science and Technology, Professor (50192349)
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| Co-Investigator(Kenkyū-buntansha) |
ISHIKAWA Masatoshi The University of Tokyo, Graduate School of Information Science and Technology, Professor (40212857)
SHIMOJI Makoto The University of Electro- Communications, Department of Mechanical Engineering and Intelligent Systems, Professor (90292474)
SUZUKI Takafumi The University of Tokyo, Graduate School of Information Science and Technology, Assistant Professor (50302659)
FURUSAWA Ryuji The University of Tokyo, Graduate School of Information Science and Technology, Research Associate (60376613)
TAKEUCHI Shoji The University of Tokyo, Institute of Industrial Science, Associate Professor (90343110)
國本 雅也 国立国際医療センター, 神経内科, 医長(研究員)
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| Project Period (FY) |
2005 – 2007
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| Project Status |
Completed (Fiscal Year 2007)
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| Budget Amount *help |
¥32,370,000 (Direct Cost: ¥24,900,000、Indirect Cost: ¥7,470,000)
Fiscal Year 2007: ¥6,890,000 (Direct Cost: ¥5,300,000、Indirect Cost: ¥1,590,000)
Fiscal Year 2006: ¥12,220,000 (Direct Cost: ¥9,400,000、Indirect Cost: ¥2,820,000)
Fiscal Year 2005: ¥13,260,000 (Direct Cost: ¥10,200,000、Indirect Cost: ¥3,060,000)
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| Keywords | micro-nano devices / medical service, welfare / neural sciences / information engineering / brain-neural information engineering / ニューロマシンインターフェース(神経電極) / 人工肢 / 随意運動機能 / 感覚機能 / 微小神経活動計測・神経刺激法 / 福祉・医療工学 / ニューロマシンインタフェース(神経電極) |
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| Research Abstract |
We constructed a prototype of an artificial limb system with which subjects were able to feel somatic sensations exactly as if they were touching the object with their own hands and were also able to move the artificial arm voluntarily exactly as intended using needle EMG information.
We used microelectrical stimulation of the sensory nerve fibers in order to evoke somatic sensations in the subjects and we attempted to control the movement of the hand and fingers of the artificial limb system using information of the motor nerve activities recorded from the concerned peripheral nerves. However, the performance of the sieve electrode which we developed was not yet sufficient for steadily recording motor nerve signals, we used needle EMG signals of the concerned muscles instead of motor nerve signals in order to control the movement of the artificial limb system.
The experiment for evaluation was performed by a healthy subject in a master-slave format using a robot hand system with the shape of human hand; pressure or vibration stimuli detected by the sensor on the robot hand were transferred to a computer and the frequency of the electrical pulses for stimulating the sensory nerve fiber was determined. These electrical pulses were then output to the concerned sensory nerve fiber via a tungsten microelectrode.
Needle EMG information was measured from the concerned muscles using the same tungsten micro-needle electrodes as were used with the sensory system and the grasping power and the positions of the finger joints were determined from the needle EMG information.
The results showed that the system worked satisfactorily. Development of nerve electrodes that can measure activity of motor nerve fibers and can stimulate sensory nerve fibers with a sufficient number of channels remains an urgent demand for the creation of a system acceptable for clinical use.
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