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Brainstem respiratory networks and cough
R Shannon1, D M Baekey, K F Morris
1University of South Florida, Tampa 33612, USA.
Pulmonary Pharmacology
|October 1, 1996
Summary
This review supports a model where the medullary neuronal network, including Bötzinger/rostral ventral respiratory group (BOT/rVRG) neurons, generates cough motor patterns. These same neurons also control normal breathing (eupnoea), refuting a separate cough center.
Area of Science:
- Neuroscience
- Respiratory Physiology
Background:
- The neural control of breathing involves complex medullary networks.
- Understanding the generation of cough motor patterns is crucial for respiratory control research.
Purpose of the Study:
- To review evidence supporting a medullary neuronal network model for cough generation.
- To investigate the role of Bötzinger/rostral ventral respiratory group (BOT/rVRG) neurons in cough and eupneic breathing.
Main Methods:
- Review of existing studies on medullary neuronal networks in cats.
- Analysis of neuronal discharge patterns during fictive cough.
- Comparison of observed neuron behaviors with cough model simulations.
Main Results:
- Evidence supports bulbospinal drive to respiratory motoneurons during cough originating from medullary neurons active during eupnea.
- BOT/rVRG neurons implicated in eupneic breathing are also involved in generating the central cough motor pattern.
- Observed neuronal alterations during fictive cough align with network model predictions, suggesting no separate cough center.
Conclusions:
- The BOT/rVRG network is central to generating the cough motor pattern.
- A preliminary model for cough generation by the BOT/rVRG network is proposed based on observed neuron behaviors and inferred synaptic actions.