Abstract:Postural sway during quiet stance often exhibits a repetition of micro fall and the subsequent micro recovery. The classical view –that the quiet bipedal stance is stabilized by the ankle joint stiffness– has been challenged by paradoxical non-spring-like behaviors of calf muscles: gastrocnemius muscles are shortened (contract) and then stretched (relax), respectively, during the micro fall and the micro recovery. Here, we examined EEG (electroencephalogram) based brain activity during quiet stance, and identi… Show more
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