A method of telemetric measurement of antroduodenal
myoelectrical activity (EMG) in freely moving pigs has
been developed. Silver bipolar electrodes were sutured
on the antrum and duodenum and connected to a
telemetry transmitter implanted extraperitoneally
between the abdominal muscles. The EMG signals were
collected by a receiver, filtered, amplified and archived by a computer.
The telemetric EMG signal did not differ from that obtained with a
conventional wire method. Substantial differences between day and
night migrating myoelectric complex (MMC) patterns were found. The
advantages of telemetric EMG recording make it a useful tool for
long-term recording of antroduodenal EMG.