四足獣の歩行運動の筋電図学的・関節機構学的研究 : II. 速歩

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  • ELECTROMYOGRAPHIC AND JOINT-MECHANICAL STUDIES IN QUADRUPEDAL LOCOMOTION : II. TROT
  • 4ソク ジュウ ノ ホコウ ウンドウ ノ キンデンズガクテキ カンセツ キコウガクテキ ケンキュウ 2 ハヤアシ エイブン

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The materials and methods used were the same as those in the previous study<:tf walk9).2. The axial skeleton moves JIS if power were loaded and then unloaded at thecenter of the beam which is supported at both ends. The M. sacrospinalis is active for?stabilizing the axial skeleton which receives the force exerted by a hind limb, and theaxial skeleton which is supported with only one fore limb.3. The increasing speed of locomotion makes various differences between trot andwalk. To increase the speed, there must be a different distribution of the swing phase, and a combination of steps, which make difference between the movements of the axial?ske1eton. It is natural that fore limb muscles, which are nearer the center of gravity ofthe body, are affected more greatly by the movement of tlae axial skeleton than the hindlimb muscles. The muscles nearer the trunk are also affected more severely by this move-ment than those far from the trunk. Each limb, however, shows essentially the samemovement in trot as in walk.

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