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Related Concept Videos

Neural Control of Respiration01:18

Neural Control of Respiration

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The neural regulation of respiration is a meticulously coordinated process primarily controlled by the respiratory centers located within the brainstem. These centers, composed of specialized neurons, transmit nerve impulses that control the contraction and relaxation of our respiratory muscles.
Respiratory Centers in the Brainstem
Two primary areas comprise the respiratory center: the medullary respiratory center in the medulla oblongata and the pontine respiratory group in the pons. The...
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Physiology of Respiration II: Neurogenic Control of Respiration01:22

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The neurogenic control of respiration coordinates various neural networks and pathways to regulate breathing rate and depth, meeting the body's oxygen and carbon dioxide exchange requirements. This system adapts to physiological and environmental conditions, ensuring optimal breathing patterns.
Central Control
The brainstem is the primary site of central control, hosting respiratory centers:
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Physiological Control of Respiration01:23

Physiological Control of Respiration

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Introduction
Breathing, a seemingly passive process, is regulated by the respiratory center in the brainstem. This center coordinates the involuntary control of respirations, which means it occurs without conscious effort, ensuring a smooth and uninterrupted pattern.
Regulation of Ventilation
The body maintains ventilation by monitoring levels of carbon dioxide (CO2), oxygen (O2), and hydrogen ion concentration (pH) in the arterial blood. Among these factors, the level of CO2 plays a crucial...
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Brainstem: Control Centers of Medulla01:21

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The medulla oblongata is a crucial part of the brainstem responsible for controlling various autonomic and involuntary functions. It contains several nuclei, including the olivary, cuneate, gracile, and solitary nuclei.
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Other Factors Affecting Respiration Centers01:17

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Breathing is primarily an involuntary activity regulated by the brainstem respiratory centers. However, it can also be consciously controlled, allowing us to hold our breath or take deeper breaths when needed. This voluntary control is facilitated by the cerebral motor cortex, which bypasses the medullary centers to stimulate the respiratory muscles directly.
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Functional Brain Systems: Reticular Formation01:13

Functional Brain Systems: Reticular Formation

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The reticular formation is a complex network of gray and white matter located within the brainstem extending from the medulla to the midbrain.
Within the reticular formation, there are several distinct nuclei that can be classified into three broad categories. The Raphe nuclei are located along the midline of the brainstem. They are primarily known for their role in synthesizing and releasing serotonin, a neurotransmitter involved in regulating mood, appetite, sleep, and circadian rhythms. The...
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Electrophysiology on Isolated Brainstem-spinal Cord Preparations from Newborn Rodents Allows Neural Respiratory Network Output Recording
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Respiratory rhythm and pattern generation: Brainstem cellular and circuit mechanisms.

Jeffrey C Smith1

  • 1Cellular and Systems Neurobiology Section, National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD, United States.

Handbook of Clinical Neurology
|August 14, 2022
PubMed
Summary

Mammalian breathing relies on rhythmic neural activity from the respiratory central pattern generator (CPG) in the brainstem. This review details cellular and circuit mechanisms for respiratory rhythm and pattern generation.

Keywords:
Breathing patternsRespiratory central pattern generatorRespiratory rhythm

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Area of Science:

  • Neuroscience
  • Physiology
  • Computational Biology

Background:

  • Breathing is controlled by rhythmic neural activity in the brainstem's respiratory central pattern generator (CPG).
  • Understanding the CPG's cellular and circuit mechanisms is crucial for respiratory control.
  • Advances in mapping brainstem regions have improved our understanding of CPG function.

Purpose of the Study:

  • To review current experimental and theoretical studies on respiratory rhythm and pattern generation.
  • To explore the cellular and circuit mechanisms within the brainstem CPG.
  • To discuss the role of computational modeling in advancing CPG research.

Main Methods:

  • Review of experimental data on medullary regions and their cellular/circuit properties.
  • Analysis of theoretical studies on CPG mechanisms.
  • Integration of findings from computational modeling studies.

Main Results:

  • The respiratory CPG exhibits rhythm-generating capabilities at multiple organizational levels.
  • Brainstem circuits demonstrate flexible neural activity patterns for diverse respiratory behaviors.
  • Computational models, driven by experimental data, offer significant mechanistic insights.

Conclusions:

  • The brainstem's respiratory CPG utilizes complex cellular and circuit mechanisms for rhythm and pattern generation.
  • Flexible control of breathing patterns is achieved through regional properties and regulatory mechanisms.
  • Interdisciplinary approaches, including computational modeling, are vital for advancing CPG research.