Usage of an EMG controlled robotic arm in able-bodied and amputee participants
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1
Research Institute of National Rehabilitation Center for Persons with Disabilities, Department of Rehabilitation for Brain Function, Japan
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2
The University of Electro-Communications, Brain Science Inspired Life Support Research Center, Japan
Feeling ownership of our limbs represents a fundamental aspect of self-consciousness, and in some circumstances, the feeling is extended out of our own body, as in the rubber hand illusion (RHI, Botvinick and Cohen, 1998). In our rubber hand experiment, we used an in-house electromyography (EMG) controlled robotic arm, and evaluated sense of agency (SA) and sense of ownership (SO) (Kalckert & Ehrsson, 2014).
A plastic board was placed horizontally in front of able-bodied participants (n=15) and an amputee (n=1), and each participant placed their right arm under the board. EMG signals were recorded from the participants’ arm to control the robotic arm, which was placed in front of the participants’ arm. The robotic arm was synchronously/asynchronously moved with their arm. The robotic arm and own hands of the able-bodied participants were stroked by paintbrushes. After the experiment, SA and SO were evaluated by subjective ratings (-3 to +3). SO was also measured by a proprioceptive drift in able-bodied participants. The experiment was repeated six times in the amputee participant.
Subjective ratings (SA/SO) in able-bodied participants were significantly greater than 0 in the synchronous condition (p < 0.05). When the participants’ arm was synchronously stroked with the robotic arm, significantly bigger proprioceptive drift to the robotic arm side (SO) was observed than the asynchronous condition. Subjective ratings (SA/SO) in the amputee were greater than 0 in the synchronous condition (p < 0.01).
These results suggest that rubber hand illusion was induced by using an EMG controlled robotic arm.
Keywords:
rubber hand illusion,
electromyography (EMG),
Sense of Agency (SoA),
Sense of ownership,
amputee,
robotic
Conference:
2015 International Workshop on Clinical Brain-Machine Interfaces (CBMI2015), Tokyo, Japan, 13 Mar - 15 Mar, 2015.
Presentation Type:
Poster 1-7
Topic:
Clinical Brain-Machine Interfaces
Citation:
Sato
Y,
Kawase
T,
Takano
K and
Kansaku
K
(2015). Usage of an EMG controlled robotic arm in able-bodied and amputee participants.
Conference Abstract:
2015 International Workshop on Clinical Brain-Machine Interfaces (CBMI2015).
doi: 10.3389/conf.fnhum.2015.218.00029
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Received:
23 Apr 2015;
Published Online:
29 Apr 2015.
*
Correspondence:
Dr. Kenji Kansaku, Research Institute of National Rehabilitation Center for Persons with Disabilities, Department of Rehabilitation for Brain Function, Tokorozawa, Saitama, Japan, kansakuk@dokkyomed.ac.jp