Posture as a reference frame: a brain neural network model

摘要

A plausible neural network simulation of the brain structuresinvolved in a goal-directed reaching movement should take two mainfactors into account. The first deals with the muscular activitiescontrolling the movement itself. The second mainly relates tostabilizing the reference frame of the movement and serves to triggerthe appropriate anticipatory postural commands. The latter involvescontrol over muscle synergies. The authors checked the validity of theconcepts of control augmentation and stabilization augmentation. Inaeronautics, each concept is implemented in a specialized computersystem. In the brain, the cerebellum (for movement coordination) and thebasal ganglia (for securing the postural stabilization of given segmentsduring each elementary movement) would play a similar role. A model isproposed to show how these two structures may intervene in helping thecerebrum during a sequence of elementary movements which includes thelocation of a target in relation to both the external world and the bodyscheme