There is described a method for non-invasively measuring electrical activity in a joint of a subject, the method comprising: removably attaching in a non-invasive manner at least two electrodes to a skin surface around an articulation comprising the joint； generating electroarthrographic potentials within the joint by loading the articulation； capturing the electroarthrographic potentials using the at least two electrodes； discriminating between electroarthrographic potentials originating from joint tissue activity and those from other sources； and generating measurement signals representing the electrical activity of joint tissue.
