Fig. 4.
Abdominal muscle recruitment during a REM epoch is associated with an increased respiratory flow. Long traces recording of respiratory flow, integrated EMG activity of diaphragm (∫DIAEMG) and abdominal (∫ABDEMG) muscles, neck EMG activity, and hippocampal activity (HPC) during a REMABD+ epoch. Note the increased respiratory flow (both inspiratory and expiratory) during ABDEMG recruitment. Details of EMG and EEG traces during ABD muscle recruitment during REM sleep (black box) are displayed in panel at right.