The Dynamic Control of Upright Posture in Normal Man on the Sinusoidally Inclined Board

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概要

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• The dynamic balance mechanisms in four normal subjects were studied by unstable board which inclined in a sinusoidal form of 0.3-4Hz. Subjects on the static sensograph (Sanei 1GO1) placed on the board were inclined antero-posteriorly or right-left. Then we got magnetic recordings of fluctuation of the center of gravity. The antero-posterior or right-left fluctuations were filtrated in the frequency of the board movements by the active filter. Lissajous's figure of right-left (abscissa) and antero-posterior fluctuation (ordinate) during right-left inclining showed the diagonal pattern from right upper to left under, but during anteroposteriorly inclining showed only the antero-posterior component. These suggested that the dynamic control of not only right-left but also antero-posterior fluctuation played the important role to balance upright standing during right-left inclining. But, as human being standing bipedally would have lateral stability, the antero-posterior control would be revealed dominantly during antero-posteriorly inclining. Furthermore, Lissajous's figure of movements of inclined board and right-left, or antero-posterior fluctuation suggested that the dynamic control of the standing posture below 1Hz was different from above 1Hz.

著者

• 千葉 剛次

  大村市立病院整形外科

• 鈴木 良平

  長崎大学医学部整形外科

• 藤井 利雄

  大村市立病院整形外科

• 本多 重信

  長崎大学医学部整形外科

• 千々岩 博文

  長崎大学医学部整形外科

• 乗松 敏晴

  長崎大学医学部整形外科

• 岡崎 威

  大村市立病院

• 近藤 司

  長崎大学医学部整形外科

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