Related Experiment Videos
The medullary respiratory network in the rat
S W Schwarzacher1, Z Wilhelm, K Anders
1Physiologisches Institut, Universität Göttingen, Germany.
The Journal of Physiology
|April 1, 1991
Summary
Researchers studied respiratory neurons in rats, identifying six types based on their firing patterns. They found specific inhibitory and excitatory interactions within the medullary respiratory network, similar to cats.
Area of Science:
- Neuroscience
- Respiratory Physiology
Background:
- The central nervous system controls breathing through complex neural networks.
- Understanding the medullary respiratory network is crucial for respiratory control research.
Purpose of the Study:
- To classify respiratory neurons in the ventrolateral medulla oblongata of rats.
- To investigate synaptic interactions within the medullary respiratory network.
Main Methods:
- Extracellular and intracellular recordings from rat respiratory neurons.
- Antidromic stimulation of spinal cord and vagal nerve.
- Analysis of postsynaptic potentials and inhibition reversal.
Main Results:
- Six types of respiratory neurons were identified: early-inspiratory, throughout-inspiratory, late-inspiratory, post-inspiratory, expiratory, and phase-spanning expiratory-inspiratory.
- Specific inhibitory patterns were observed between different neuron types.
- Post-inspiratory neurons showed altered discharge patterns during hypoxia and lung inflation.
Conclusions:
- The rat's central respiratory rhythm is organized into three phases: inspiratory, post-inspiratory, and expiratory.
- Synaptic interactions in the rat medullary respiratory network resemble those in cats.