This chapter explains a current research in physiology that can open up other horizons for us in respect of the question of time. There are two physiological theories of movement. First, the cognitivist theory prioritizes laboratory research and its approach to living things remains essentially discursive. The second current of thought was based from the outset on studying its object in a natural milieu, in situ, without depriving itself, however, of the benefits of laboratory research. Anticipation is a temporal mode that is indispensable for accomplishing movement. Movement is what gave rise during the course of evolution to the emergence of the nervous system in living things. Voluntary movement follows the pulsating and discontinuous rhythm that is the cadence of physiological tremor, which is always already in place in order to ensure every eventual muscular execution. The central pattern generator (CPG) is a neural network in the spinal cord which functions independently of commands from the brain and sensory stimulation.