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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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Other Factors Affecting Respiration Centers01:17

Other Factors Affecting Respiration Centers

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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.
However, the ability to hold one's breath voluntarily is not limitless. When the CO2 concentration in the blood reaches a critical...
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Physiological Control of Respiration01:23

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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.
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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.
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Mechanism of Breathing II: Expiration01:23

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The Physiology of Expiration: A Seamless Respiratory Process
Expiration, or exhaling, is a complex physiological process that begins as the inspiratory muscles begin to relax. This relaxation triggers a series of events that epitomize the efficiency of the respiratory system.
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The process of breathing, inhaling and exhaling, involves the coordinated movement of the chest wall, the lungs, and the muscles that move them. Two muscle groups with important roles in breathing are the diaphragm, located directly below the lungs, and the intercostal muscles, which lie between the ribs. When the diaphragm contracts, it moves downward, increasing the volume of the thoracic cavity and creating more room for the lungs to expand. When the intercostal muscles contract, the ribs...
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Control de la respiración de la vocalización

Steffen R Hage1,2

  • 1Neurobiology of Social Communication, Department of Otolaryngology-Head and Neck Surgery, Hearing Research Centre, University of Tübingen, Medical Center, Tübingen, Germany.

Science (New York, N.Y.)
|March 7, 2024
PubMed
Resumen

Los investigadores descubrieron un circuito clave del tronco cerebral esencial para coordinar la voz y la respiración. Este hallazgo avanza nuestra comprensión del control vocal-respiratorio en la laringe.

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Área de la Ciencia:

  • La neurociencia
  • Fisiología respiratoria
  • Ciencias del habla

Sus antecedentes:

  • La coordinación vocal-respiratoria es fundamental para la producción del habla.
  • Los mecanismos neuronales que subyacen a esta coordinación aún no se comprenden por completo.
  • El tronco cerebral juega un papel crítico en la integración de las funciones respiratorias y laríngeas.

Objetivo del estudio:

  • Identificar y caracterizar el circuito neuronal específico en el tronco cerebral responsable de la coordinación vocal-respiratoria.
  • Para aclarar el papel de este circuito en el control de la actividad laríngea durante la respiración.

Principales métodos:

  • Se utilizaron registros electrofisiológicos in vivo en modelos animales.
  • Empleó técnicas optogenéticas y quimiogenéticas para manipular la actividad neuronal.
  • Se realizó una electromiografía laríngea y un control respiratorio.

Principales resultados:

  • Identificó una nueva población neuronal dentro del tronco cerebral.
  • Se demostró que la activación de este circuito modula directamente la actividad muscular laríngea.
  • Se ha demostrado que este circuito es crítico para sincronizar la abducción laríngea con las fases respiratorias.

Conclusiones:

  • Se ha revelado un circuito crucial del tronco cerebral para la coordinación vocal-respiratoria de la laringe.
  • Este circuito proporciona un enlace crítico entre los centros de control respiratorio y el sistema motor laríngeo.
  • Comprender este circuito ofrece nuevos conocimientos sobre la base neuronal de la producción del habla y posibles objetivos terapéuticos para los trastornos de la voz.