What resolves this contention: Autonomous dynamical-systems view of motor corte…

What resolves this contention: Autonomous dynamical-systems view of motor cortex (low-d intrinsic dynamics setting an initial state) vs. evidence that continuous external input drives state transitions during reaching. / Instead of the reported primacy of intrinsic action, we found that input from extrinsic sources was responsible for these results. / This perspective concentrates on describing the neural state using as few degrees of freedom as possible and on inferring the rules that govern the motion of that neural state.