Hernandez Y M, Lindsey B G, Shannon R
Department of Physiology and Biophysics, College of Medicine, University of South Florida, Tampa 33612.
Exp Brain Res. 1989;78(1):219-22. doi: 10.1007/BF00230702.
Our objective was to determine if caudal ventral respiratory group (VRG) expiratory (E) neurons that drive abdominal expiratory motoneurons in the lumbar cord respond to intercostal and lumbar nerve afferent stimulation. Results showed that 92% of medullary E-neurons that were antidromically activated from the upper lumbar cord reduced their activity in response to stimulation of external and internal intercostal and lumbar nerve afferents. We conclude that afferent information from intercostal and abdominal muscle tendon organs has an inhibitory effect on caudal VRG E-neurons that drive abdominal expiratory motoneurons.
