If a device can control human hands, the device can be use- ful for HCI and tangible application’s output. To aid the controlling of finger movement, we present PossessedHand, a device with a forearm belt that can teach when and which fingers should be moved.

Please also see the article by New Scientist.

Device Configuration

PossessedHand controls the user’s fingers by applying electrical stimulus to the muscles around the forearm. Each muscle is stimulated via 28 electrode pads. 

Muscles at different depths in the forearm can be se- lected for simulation by varying the stimulation level. PossessedHand can automatically calibrate the system for individuals. The automatic calibration system estimates rela- tions between each electrode pad, stimulation level and mus- cle movement. Experiments show that PossessedHand can control the motion of 16 joints in the hand.

(Results of controlling user’s hand gesture)


We also present an application of this device to help a beginner learn how to play musical instruments such as the koto.

We are looking for partners who are interested in PossessedHand applications including:

  • Rehabilitation support
  • Learning support

Research articles

(Our papers describe the detailed information about this technology)

  • PossessedHand: A Hand Gesture Manipulation System using Electrical Stimuli, Emi Tamaki, Miyaki Takashi and Jun Rekimoto, Augmented Human, 2010[PDF].
  • PossessedHand: 電気刺激を用いた人体手形状の直接制御システム, 玉城絵美, 味八木崇, 暦本純一, インタラクション2010論文集, 情報処理学会シンポジウムシリーズVol. 2010, No. 4, pp.231-234, 2010.[PDF]
  • PossessedHand: Techniques for controlling human hands using electrical muscles stimuli, Emi Tamaki, Takashi Miyaki, Jun Rekimoto, CHI2011, paper, ACM[PDF 25.8MB].