Disclosed is an electrode assembly, comprising an electrode configured to be placed on a surface of a subject's body for recording an electric body signal, an electrode receptacle configured to receive the electrode, and a coupling mechanism configured to couple the electrode to the electrode receptacle, the coupling mechanism having a locked configuration, in which the electrode is coupled to the electrode receptacle, and an unlocked configuration, in which the electrode is decoupled from the electrode receptacle. The disclosure also relates to an electrode, an electrode receptacle and a system.