The importance of investigating visually guided walking comes from everyday life where navigating in traffic, avoiding a puddle etc. makes the efficiency of visually guided walking crucial. Most knowledge about cortical contributions to muscle activity during visually guided walking comes from studies in the cat. In humans, the central control of visually guided walking has not been investigated as thoroughly and the theories developed on the basis of research in the cat should be confirmed in human studies to ensure their validity and relevance. The overall aim of the thesis was to investigate the central control of walking with a special focus on visually guided gait. A custom virtual locomotor stepping task was made that enabled us to perform different visually guided walking tasks while collecting EEG and EMG measurements. In paper I it was investigated whether subjects were able to integrate a novel virtual visually guided locomotor sequence task with normal walking on a motorized treadmill. A sequence specific learning effect was found in both children and adult subjects indicating that visually guided walking may be modulated by activity in the corticospinal tract. The subsequent papers investigated the relations between corticospinal coherence and normal and visually guided walking. In paper II the corticospinal drive to the plantar flexors was investigated during normal walking using EEG-EMG coherence over the motor cortex and EMG from soleus (SOL) and medial gastroc (MG) muscles, respectively. The plantar flexors are important when modifying step length and plantar flexor force are highly dependent on an intact corticospinal pathway. However, almost no prior knowledge about central common drive to the plantar flexors exists. Results from this study showed EEG-EMG coherence in the gamma frequency band indicating that the plantar flexors receive direct cortical input during normal walking. The overall correlation was highest towards push off indicating that the motor cortex contributes to plantar flexor activity and push off during normal walking. In paper III the corticospinal drive during visually guided walking was estimated using EEG-EMG coherence between EEG over 1) the motor cortex and EMG from tibialis anterior (TA) and 2) the motor cortex and EMG from MG & SOL, respectively. The central common drive was estimated as EMG-EMG coherence between proximal & distal TA and MG & SOL, respectively. Results showed increased beta and gamma band EMG-EMG coherence for both TA-TA and MG-SOL indicating that, like in the cat, human motor cortex directly modulates visually guided gait. Finally in paper IV the central common drive was investigated during the same visually guided locomotor sequence learning task, as presented in paper I. Here an additional increase in gamma coherence was seen when comparing visual guided walking to a random or sequence specific walking task. In addition beta band coherence was higher in the random stepping task compared to sequence specific task. It was speculated that the difference was due to a need for increased attention during the unpredictable random stepping task. To conclude, the main results of the thesis showed increased central common drive during visually guided walking indicating increased corticospinal contributions during visually guided walking. In addition a novel locomotor sequence task can be integrated with normal walking. This is relevant in sporting settings where complex movement patterns has to be integrated with running and walking and the automatic control of certain movement pattern may free cognitive resources crucial to success. It may also have perspectives for rehabilitation as the increased cortical activation could benefit rehabilitation outcomes. Further research should address the potential for visually guided walking in rehabilitation and sporting movements.