We emphasize the relevance to cognitive psychology of Feldman and Levin's theoretical position. Traditional views of motor control have failed to clearly separate “production control” at the level of motor command, based on task-independent CV (control variables), from intentional “product control” based on task-dependent parameters. Because F&L's approach concentrates on the first process (trajectory formation), it can distinguish the product control stage.

How to conceive the place of the brain in the specification of the animal environment relation? Reality is a continuum between external physical energies and brain energy. The global array concept linked to the physical world and its physical energies could be transposed to the brain as a physical object and a dynamical system.