The invention relates to a method of constructing a value representative of an interaction between a plurality of brain regions, the method being implemented by an electronic device, said electronic device comprising a processor and a memory. According to the invention, the method comprises: - obtaining (10), in the form of connectivity matrices, dynamic functional networks, which are representative of electrical signals measured for a predetermined number of points of interest, called nodes, within a cerebral cortex during a given time period; - determining (20), from at least one of said connectivity matrices, a global efficiency (GE) score and at least one clustering coefficient score (Cc) for each node of said at least one of said connectivity matrices; - calculating (30) a value representative of an interaction between the plurality of brain networks in the form of a distribution ratio (Dl) using said global efficiency score and said clustering coefficient scores (Cc).