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A comparative evaluation of sonomyography, electromyography, force, and wrist angle in a discrete tracking task

Guo, JY, Zheng, YP, Kenney, LPJ, Bowen, A, Howard, D and Canderle, J 2011, 'A comparative evaluation of sonomyography, electromyography, force, and wrist angle in a discrete tracking task' , Ultrasound in Medicine & Biology, 37 (6) , pp. 884-891.

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    We have previously used the real-time change of muscle thickness detected using ultrasound, namely sonomyography (SMG), for prosthesis motor control purposes. In the present study, we further compared subjects’ performance using SMG and surface electromyography (EMG) in a series of discrete tracking tasks, both with and without a concurrent auditory attention task. Sixteen healthy subjects used different signals in a random order to control the cursor on a personal computer screen to cancel the letter ‘‘E’’ in a sequence of vertically arranged letters. Subjects’ performance was evaluated under isometric contraction and wrist extension using the extensor carpi radiali muscle. The percentage of successfully cancelled Es using SMG decreased by 21 ± 16% and 17 ± 11% in isometric contraction and wrist extension tests, respectively, compared with the corresponding performances using force and angle signals. The corresponding reduction recorded by using EMG was 40 ± 29% and 41 ± 25%. In addition, there was a significant decrease by using EMG compared with that by SMG (p , 0.001). The results also demonstrated that there was no significant difference of performances of canceling E between the single and dual tasks by using any of the control signals (p . 0.99). Furthermore, the SMG control provided more consistent performances under the single and dual tasks compared with EMG control.

    Item Type: Article
    Uncontrolled Keywords: Cognition, electromyography, EMG, muscle, prosthetic control, sonomyography, SMG, ultrasound
    Themes: Health and Wellbeing
    Schools: Colleges and Schools > College of Health & Social Care > School of Health Sciences > Centre for Health Sciences Research
    Journal or Publication Title: Ultrasound in Medicine & Biology
    Publisher: Elsevier
    Refereed: Yes
    ISSN: 0301-5629
    Depositing User: LPJ Kenney
    Date Deposited: 06 Oct 2011 15:58
    Last Modified: 21 Jul 2014 11:56

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