The image shows a subject controlling a motorised bed using brain signals, giving the possibility to locked-in patients for example to gain control over their environment and limit the constant carer support. The bed is controlled through a set of stimuli displayed on a computer screen, flickering at different frequencies. Each stimulus is attributed to a specific bed function and the control signal the subject wanted to activate is detected by the system in real time by processing the electroencephalo­graphic signals recorded from the occipital brain area.