In addition, sensory feedback from skin and moving muscles plays a significant role in the regulation of the network activity and the locomotor movements. In humans, it is still unclear to what extent a spinal network is involved in the generation of walking and whether or not sensory feedback to the spinal cord plays a similarly significant role. In large parts of the stance phase of human walking, the ankle extensors undergo eccentric contractions, which make the large and fast conducting muscle afferents from these muscles strongly increase their discharge.