Journal of the Society of Biomechanisms
Print ISSN : 0285-0885
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Volume 28, Issue 1
Displaying 1-7 of 7 articles from this issue
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  • Study of simple and easy method for elbow joint torque measurement using Hand-held sensor
    Seiichi HISAMOTO, Masatoshi HIGUCHI, Norio MIURA, Kazunari MORIMOTO, T ...
    2004 Volume 28 Issue 1 Pages 27-33
    Published: 2004
    Released on J-STAGE: August 13, 2004
    DOIhttps://doi.org/10.3951/sobim.28.27
    JOURNAL FREE ACCESS
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    Elbow isometric flexion joint torque (EF) and elbow isometric extension joint torque (EE) were measured with the hand-held dynamometer (HHD) in 24 normal healthy men and women aged 20s decade to 50s decade, to test the validity of EF and EE measured with HHD comparing with the torque measurement machine (TM), in order to prepare the measurement of upper and lower limb's isometric joint torque with about 1,000 subjects across the age, with the examiners who were not medical specialists. As a result, intra-session variation of HHD measurements were fare (coefficient of variation ranged from 0.01 to 0.08), and there were not significant differences in inter-session variation and also in inter-tester variation (correlation coefficients ranged from 0.915 to 0.959). In comparison with HHD measurements and TM measurements, they did not differ significantly and validity of HHD measurements were fair (correlation coefficients ranged from 0.813 to 0.950).
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  • Head-eye coordination during circular locomotion
    Eishi HIRASAKI
    2004 Volume 28 Issue 1 Pages 34-40
    Published: 2004
    Released on J-STAGE: August 13, 2004
    DOIhttps://doi.org/10.3951/sobim.28.34
    JOURNAL FREE ACCESS
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    The head and eye movements of seven normal subjects were measured while they walked around the perimeter of a disk-shaped platform (120 cm diameter) in light. During this circular walking, head yaw relative to the body compensated for the intensive modulation in body yaw, resulting in smooth head movement in space. The sum of the angular velocities of the head yaw and the slow phases of eye nystagmus was almost zero, indicating that both of these processes functioned in conjunction to maintain a stable gaze in space. The mean roll position of the head tilted inward. No significant head tilt was observed when the subjects walked on a counter-rotating circular treadmill, suggesting that the head tilts were induced by tilting of the gravito-inertial acceleration vector.
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