Publications by authors named "Hiroyuki Torishima"

Article Synopsis
  • Myoelectric hands help individuals with upper-limb deficiencies but are ineffective for those with short stumps or paralysis, prompting the development of a new electric prosthetic hand using wireless sensor technology.
  • A study compared this new prosthetic hand with a standard myoelectric hand (Ottobock), involving ten healthy therapists who tested both devices on fixed forearms while performing specific tasks.
  • Although no significant performance differences were found, the new prosthetic hand showed a smaller increase in fatigue (measured by the Borg scale), indicating its potential for broader use among people with upper-limb deficiencies.
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Background: Fitting a stump prosthesis is difficult in transhumeral amputees because of the stump's conical form. Shoulder harnesses for suspension can cause neck and shoulder pain. We developed a novel spiral socket transhumeral prosthesis to overcome these difficulties.

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We previously proposed a new bioinstrumentation using the shape deformation of the amputated upper limbs without using the myoelectricity generated on the skin of the upper limbs. However many electronic parts were required owing to a bridge circuit and multi-amplifier circuits so as to amplify a tiny voltage of strain gages. Moreover, the surplus heat might occur by the overcurrent owing to low resistance value of strain gages.

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Some upper limb amputees have been annually supplied with myoelectric prostheses by social rehabilitation promotion services. However, the persons supplied with the prostheses have been limited because a supply system has not been established yet. Accordingly, we propose a new bioinstrumentation using the shape deformation of the amputated upper limbs without using the myoelectricity generated on the skin of the upper limbs.

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