An apparatus and method of identifying artifacts in signals indicative of detected myoelectrical activity is provided. The method includes providing electrodes to obtain a plurality of first signals over time. The first signals are produced from an internal organ in the abdominal cavity of a living being. The first signals include spurious signals as a result of artifact. A sensor obtains a plurality of second signals simultaneously as the first signals are obtained. The second signals are indicative of a respiratory function of the living being and include spurious signals indicative of artifact. The first and second signals are recorded simultaneously. The occurrence of artifacts is identified by noting irregularities in both the recorded first and second signals during a particular time frame.