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Extrapersonal frames of reference for aimed movements are representationally convenient. They may, however, carry associated costs when the movement is executed in terms of the complex coordination of multiple joints they require. Studies that have measured both fingertip and joint paths suggest the motor systems may seek a compromise between simplicity of extrapersonal spatial representation and computational simplicity of multi-joint execution. © 1995, Cambridge University Press. All rights reserved.

Original publication




Journal article


Behavioral and Brain Sciences

Publication Date





758 - 761