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Motor Cortex Activation during Mental Imagery of Walking: An fNIRS Study
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Author(s): Yinlai Jiang (Kochi University of Technology, Japan), Shuoyu Wang (Kochi University of Technology, Japan), Renpeng Tan (Kochi University of Technology, Japan), Kenji Ishida (Kochi University of Technology, Japan), Takeshi Ando (Waseda University, Japan)and Masakatsu G. Fujie (Waseda University, Japan)
Copyright: 2013
Pages: 9
Source title:
Biomedical Engineering and Cognitive Neuroscience for Healthcare: Interdisciplinary Applications
Source Author(s)/Editor(s): Jinglong Wu (Okayama University, Japan)
DOI: 10.4018/978-1-4666-2113-8.ch004
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Abstract
The authors are developing a hybrid walking rehabilitation system to realize the early recovery of walking ability, which includes both active movement training using walking rehabilitation machines and neurorehabilitation using mental imaginary of walking. In this study, the authors compared the activation of the motor area during real walking (RW), virtual walking (VW), and walking observation (WO) using fNIRS (functional Near-InfraRed Spectroscopy). VW was a first-person perspective imagery in which the subjects were shown moving scenes and imagined that they were actually walking in the scenes. WO was a third-person perspective imagery in which the subjects were instructed to imagine that they were walking at the same pace as the person in the video being shown to the subjects. Based on four subjects, results showed that the oxygenated hemoglobin (oxy-Hb) in the motor area during both the VW and WO were on average higher than during the RW. This might be because it was not necessary to pay attention to the movements of the legs and feet during normal walking, whereas movement planning was required when the subjects imagined that they were walking similar to another person. There was no significant difference between the oxy-Hb during the VW and the WO. The importance of the stimulus diversity in the mental imagery of walking was suggested.
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