Ying Guang Shi

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Let dα be a measure on R and let σ = are arbitrary real numbers. A polynomial ω n (x) := (x − x 1)(x − x 2)...(x − x n) with x 1 ≤ x 2 ≤ ... ≤ x n is said to be the n-th σ-orthogonal polynomial with respect to dα if the vector of zeros (x 1 , x 2 , ..., x n) T is a solution of the extremal problem R n k=1 |x − x k | m k dα(x) = min y1≤y2≤...≤yn R n k=1 |x −(More)
Numerical simulations were used to explore the consequences of a spatially non-uniform sense of hand position on arm movements in the horizontal plane. Isotropic or anisotropic position errors were introduced into several starting hand positions and the resulting errors in movement direction were quantified. Two separate simulations were performed. In one(More)
Understanding the neural representation of limb position is important for comprehending the control of limb movements and the maintenance of body schema, as well as for the development of neuroprosthetic systems designed to replace lost limb function. Multiple subcortical and cortical areas contribute to this representation, but its multimodal basis has(More)
Understanding the neural mechanisms of limb position estimation is important both for comprehending the neural control of goal directed arm movements and for developing neuroprosthetic systems designed to replace lost limb function. Here we examined the role of area 5 of the posterior parietal cortex in estimating limb position based on visual and somatic(More)
Although significant progress has been made in understanding multisensory interactions at the behavioral level, their underlying neural mechanisms remain relatively poorly understood in cortical areas, particularly during the control of action. In recent experiments where animals reached to and actively maintained their arm position at multiple spatial(More)
27 Understanding the neural representation of limb position is important for comprehending the 28 control of limb movements and the maintenance of body schema, as well as for the development 29 of neuroprosthetic systems designed to replace lost limb function. Multiple subcortical and 30 cortical areas contribute to this representation but its multimodal(More)