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Neural mechanisms for sigh generation during prenatal development.
1Institut de Neurosciences Cognitives et Intégratives d'Aquitaine, CNRS UMR 5287, Université de Bordeaux , Bordeaux , France.
Journal of Neurophysiology
|June 14, 2018
Summary
The preBötzinger complex generates both normal breathing (eupneic) and sigh rhythms. Sigh rhythmogenesis begins during embryonic development, relying on distinct neural properties for its expression.
Area of Science:
- Neuroscience
- Developmental Biology
- Respiratory Physiology
Background:
- The preBötzinger complex (preBötC) controls inspiratory behavior.
- It generates both eupneic and sigh rhythms, which differ in amplitude, frequency, and waveform.
- Sighs are crucial for lung function, particularly in newborns.
Purpose of the Study:
- To review recent findings on the developmental onset of sigh rhythmogenesis.
- To elucidate the cellular, membrane, and synaptic properties underlying sigh production.
- To understand the distinct developmental trajectories of eupneic and sigh rhythms.
Main Methods:
- Electrophysiological recordings from transverse brainstem slices.
- Computational modeling of neural networks.
- Review of existing research on prenatal development of respiratory rhythms.
Main Results:
- Sigh rhythmogenesis emerges during embryonic development.
- Eupneic and sigh rhythms originate from the same network but have different developmental onset times.
- Distinct cellular, membrane, and synaptic properties are required for sigh expression.
Conclusions:
- Eupneic and sigh rhythms are generated by the preBötC through distinct developmental processes.
- Understanding early sigh mechanisms can inform treatments for respiratory deficiencies in premature infants.
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