For us, walking forms a big challenge. At young age, we are unable to walk and crawl on all fours ? a form of quadrupedal gait. At late age, we sometimes return to a ?quad-rupedal gait?, with front limbs typically replaced by walking aids. Between those ex-tremes, we are able to walk with remarkable ease, and mostly without falling. How are we able to do so? Answering this question can have major impacts, as consequences of an unstable gait, i.e. falls, place a large socioeconomic burden on society, not to forget on the individual that falls. Looking at behavior, the required stability has at least three aspects, namely steady state-, proactive-, and reactive gait stability. During my PhD, I worked on meth-ods to quantify these aspects. In the here-proposed experiments, I hope to tackle how stable gait is achieved by looking at supraspinal neural structures that participate in the required motor control. I plan to do so using exciting new data analysis approaches in the field of high-density electro-encephalography. First, I will localize brain areas involved in maintaining steady-state gait stability. Second, I will examine the effects of attentional load on gait stability via a dual task paradigm and instructed attention towards gait. Third, I will assess which brain areas are (in which way) involved in the different aspects of gait stability, i.e. steady-state, proactive, and reactive gait stability, by applying (un)expected perturbations to gait. By performing these three studies in young adults, fall-prone, and ?normal? elderly, it is my hope that my fundamental results can be immediately translated to practically useful applications. These include the development of better gait stability measures, as well as a potential shift in fall prevention therapy from internal focus (i.e. monitoring ones own gait), to external focus (i.e. walking towards a building).