ATTENTION OF POSTURAL CONTROL ON FOOT SOMATOSENSOR DISTURBANCE CAUSED BY THE COMPRESSION OF BLOOD VESSELS

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概要

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• This study aimed to compare the center of foot pressure (CFP) during different ischemia periods by cuff compression. Ten healthy young adult males held their CFP for 1 min before and after cuff compression (250 mmHg) of lower limb blood vessels during two dif-ferent compression periods (10 min and 26 min). Two-point discrimination thresholds and electric stimulus perception thresholds of each subject's right foot sole were measured dur-ing cuff compression to examine changes in the perceived level of cutaneous and proprio-ceptive sensation by blood flow inhibition. In addition, oxygenation kinetics in the anterior tibial muscle tissue was examined by near-infrared spectroscopy during cuff compression. The CFP was evaluated by using 36 parameters. CFP deflection tended to increase after cuff compression and to be larger over a long ischemic time (26 min) as compared with a short ischemic time (10 min). The proprioceptive perception threshold using electric stimu-lation showed a significant interaction and was higher after 26 min ischemia than at the ini-tial timepoint and after 10 min ischemia. The Δ[Oxy Hb/Mb], Δ[Deoxy Hb/Mb] and Tissue oxygenation index (TOT) changed significantly after both ischemic conditions than at the initial condition. There was no significant difference in the Tissue oxygenation index and A[Deoxy Hb/Mb] between both ischemic conditions. Many parameters regarding the deflection velocity and anteroposterior and lateral deflection had significantly larger values after 26 min ischemia than at the initial time point and after 10 min ischemia. Postural deflection may not be affected by the oxygen deficiency of muscle tissues caused by the compression of blood vessels for 10 min, but strongly affected by the cutaneous and propri-oceptive sensation disturbances occurring from compression lasting over 10 min.

著者

• Yamada Takayoshi

  Fukui National College Of Technology

• Demura Shinichi

  Department Of Physical Education Kanazawa University

• KITABAYASHI Tamotsu

  Tokyo University of Science

• Uchiyama Masanobu

  Kanazawa Coll. Of Art

• Yamaji Shunsuke

  University Fukui Faculty Of Medical Sciences

• DEMURA SHINICHI

  Department of Physical Education, Kanazawa University

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