The disclosure relates to a brain stimulation system (102), comprising:a) a computer program product, e.g. a data carrier, preferably a non-transitory data carrier, or a data stream, comprising program code (PI, Pla) which, when loaded and executed on an electronic control unit (108), provides an operation control system, orb) an electronic control unit (108) with a program code (PI, Pla) loaded on the electronic control unit (108), wherein the program code (PI, Pla), when executed on the electronic control unit (108), provides an operation control system (200),wherein the operation control system (200) is configured to control a brain training and/or stimulation session for a brain, and wherein the operation control system (200) comprises a plurality of control system functionalities, the control system functionalities comprising:- a stimulation functionality (202) which is configured to cause the electronic control unit (108) to issue a stimulation command to an electrical brain stimulation device (122) to cause the electrical brain stimulation device (122) to perform an electrical brain stimulation procedure； and- a presentation functionality (204) which is configured to cause the electronic control unit (108) to issue a presentation command in order to present a task to be performed by a user (120) on a user interface (110),wherein preferably the stimulation functionality (202) and the presentation functionality (204) are linked (254 to 262) or linkable to one another.
