Embodiment assessment for using virtual scissors system

- evaluation by hemodynamic change in the brain -

Koji Tanida, Kenji Funahashi, Masao Ohmi and Masashi Kusumi

Koji_Tanida, Masashi_Kusumi}@n.t.rd.honda.co.jp

kenji@center.nitech.ac.jp

ohmi@orchid.mattolab.kanazawa-it.ac.jp

Abstract: We investigated how hemodynamics in the brain behave using NIRS (Near Infrared Spectroscopy)

while man using tool. The tools in our experiment were a pair of real scissors and virtual reality scissors. Such

a virtual reality technology allows amount of feedback information to change. We tested with five male-

subjects, right-handed. The results showed that when amount of feedback information which was generated

during cutting was richer, the hemodynamics change of oxygenated hemoglobin was greater in prefrontal area

of left hemisphere. This observation means that it is necessary to process integration of motor and sensory

information during operation with tool in order to feel “reality”.

Key Words: Embodiment, Near Infrared Spectroscopy, Brain activation, Scissor, Sensori-motor

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