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Related Concept Videos

Physiology of Respiration II: Neurogenic Control of Respiration01:22

Physiology of Respiration II: Neurogenic Control of Respiration

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:
Physiological Control of Respiration01:23

Physiological Control of Respiration

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...
Assessment of Ventilation II: Respiratory Depth and Rhythm01:29

Assessment of Ventilation II: Respiratory Depth and Rhythm

Respiratory Depth
Respiratory depth measures the volume of air inhaled or exhaled during a breath. It can vary from shallow to deep and typically remains consistent when a person is at rest or asleep. Occasionally, individuals will automatically inhale deeply, known as sighing, which inflates the lungs with more air than normal breathing.
To assess respiratory depth, observe the degree of chest excursion or movement:
Alterations in Respiration II01:30

Alterations in Respiration II

There are numerous types of normal and abnormal respiration. Based on ventilatory movements, breathing patterns are classified as regular, deep, or shallow. Examples include Biot's breathing, Cheyne-Stokes respiration, Kussmaul's breathing, hyperventilation, and hypoventilation. Each pattern is clinically significant and aids in evaluating patients.
In Biot's breathing, the respiratory rate and depth are irregular, alternating between periods of deep gasping and apnea. Common causes include...
Respiratory Capacities01:24

Respiratory Capacities

Respiratory capacities are crucial indicators of lung function, representing the maximum amount of air an individual's respiratory system can handle during various breathing phases.
One key metric is the Inspiratory Capacity (IC), which represents the maximum amount of air that can be inhaled with full effort. IC is calculated by summing the tidal volume and inspiratory reserve volume, typically ranging from 2.4 to 3.6 liters.
The Functional Residual Capacity (FRC) represents the air in the...
Other Factors Affecting Respiration Centers01:17

Other Factors Affecting Respiration Centers

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 level,...

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Custom Smartphone Application to Guide Locomotor-Respiratory Coupling in the Field Using Step-Adaptive Breathing Sounds
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Adaptive trends in respiratory control: a comparative perspective.

William K Milsom1

  • 1Department of Zoology, University of British Columbia, Vancouver, British Columbia, Canada. milsom@zoology.ubc.ca

American Journal of Physiology. Regulatory, Integrative and Comparative Physiology
|April 2, 2010
PubMed
Summary
This summary is machine-generated.

Comparative physiology reveals adaptive trends in respiratory control, highlighting the evolution of rhythm generators and species-specific breathing patterns for efficient gas exchange.

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Area of Science:

  • Comparative Physiology
  • Respiratory Control
  • Evolutionary Biology

Background:

  • August Krogh's 1941 monograph laid the foundation for comparative respiratory physiology.
  • Comparative studies continue to advance understanding of respiratory adaptations to environmental demands.
  • Recent research focuses on adaptive trends in respiratory control mechanisms.

Purpose of the Study:

  • To review recent advances in understanding adaptive trends in respiratory control.
  • To explore the evolutionary origins and integration of respiratory rhythm generators.
  • To examine how breathing patterns are modulated by physiological and anatomical factors.

Main Methods:

  • Review of recent scientific literature on respiratory control.
  • Analysis of evolutionary shifts in respiratory rhythm-generating sites.
  • Examination of the interplay between central nervous system generators and peripheral feedback.

Main Results:

  • Respiratory rhythm generators likely co-evolved with chewing, suckling, and swallowing.
  • Evolution shows a caudal shift in the primary respiratory rhythm-generating site within the central nervous system.
  • Breathing patterns are species-specific, influenced by pulmonary mechanics and modulated by airway and arterial receptors.

Conclusions:

  • Multiple "segmental" rhythm generators exist, with potential for modulation under specific conditions.
  • Breathing pattern modulation optimizes airway protection, ventilation, gas exchange, and breathing economy.
  • Understanding these adaptive trends is crucial for comprehending diverse metabolic performances across species.