Study of activation in motor cortex during mental imagery of walking using fNIRS

Yinlai Jiang, Shuoyu Wang, Renpeng Tan, Kenji Ishida, Takeshi Ando, Masakatsu G. Fujie

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Abstract

    A walking rehabilitation system is proposed which includes both muscle strength enhancement by walking rehabilitation machines and neurological rehabilitation by imaginary walking. In a previous study, we have demonstrated that the concentration of oxygenated hemoglobin (oxy-Hb) in motor area during imaginary walking was higher than that during real walking by means of fNIRS (functional Near-InfraRed Spectroscopy). In order to develop an effective way to activate the motor area in mental imagery, we compared the activation in motor area during real walking (RW), virtual walking (VW), and walking observation (WO). In the VW, subjects were shown moving scenes of a virtual visual environment in which subjects easily imagined as if they were actually walking from the first-person perspective. In the WO, subjects were instructed to imagine that they were walking with the same pace to a person in the video being shown to the subjects (third-person perspective). Four subjects participated in the experiment. As a result, the oxy-Hb in motor area during both VW and WO were higher than that during RW on the average. This was because that it was not necessary to pay attention to the movements of the legs and feet during normal walking, while movement planning was required when the subjects imagined their walking in the same way to another person. There was no significant difference between the oxy-Hb during VW and that during WO. The importance of stimulus diversity in mental imagery of walking was suggested.

    Original languageEnglish
    Title of host publication2011 IEEE/ICME International Conference on Complex Medical Engineering, CME 2011
    Pages637-640
    Number of pages4
    DOIs
    Publication statusPublished - 2011
    Event2011 5th IEEE/ICME International Conference on Complex Medical Engineering, CME 2011 - Harbin
    Duration: 2011 May 222011 May 25

    Other

    Other2011 5th IEEE/ICME International Conference on Complex Medical Engineering, CME 2011
    CityHarbin
    Period11/5/2211/5/25

    Keywords

    • fNIRS (functional Near-InfraRed Spectroscopy)
    • Mental imagery of Walking
    • Virtual walking
    • Walking observation
    • Walking rehabilitation

    ASJC Scopus subject areas

    • Biomedical Engineering

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  • Cite this

    Jiang, Y., Wang, S., Tan, R., Ishida, K., Ando, T., & Fujie, M. G. (2011). Study of activation in motor cortex during mental imagery of walking using fNIRS. In 2011 IEEE/ICME International Conference on Complex Medical Engineering, CME 2011 (pp. 637-640). [5876818] https://doi.org/10.1109/ICCME.2011.5876818