- When any muscles are stimulated
electrical changes take place.
- Body fluids are good electrical
conductors (weak electrolyte solution). Thus the
body can be considered Volume Conductor.
- By placing electrodes over the
body one can record these electrical changes - Electrocardiogram
- An ECG trace is obtained by
placing one electrode on the body (ACTIVE
or EXPLORING Electrode) and another
electrode placed at zero potential or ground (INDIFFERENT