A packaged assembly of disposable electrodes for use in an electromyography (EMG) and/or nerve conduction velocity (NCV) testing procedure, the assembly comprising in combination at least one disc electrode and at least one ground electrode and at least one digital ring electrode, each of said electrodes of said combination including an element having a tab for connection to a cable connector and being laminated of a plurality of layers including first and second outer layers, said first outer layer being a backing member with exposable adhesive thereon, a hydrogel layer intermediate said outer layers, and a conductive foil layer between said hydrogel layer and said second outer layer, and said disc electrode further comprising two identical disc electrode elements separably jointed to each other by a central portion and the tab of each said disc electrode element being remote from said central portion.