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Related Concept Videos

Sleep Apnea01:21

Sleep Apnea

Sleep apnea is a condition where breathing stops intermittently during sleep, often leading to significant health issues. Each episode can last from 10 to 20 seconds or more and is frequently accompanied by a brief arousal from sleep. This disturbance, largely unnoticed by the individual, can lead to severe daytime fatigue. Commonly, individuals seek help after being informed by their partners about loud snoring and noticeable breathing pauses during sleep.
The condition is more prevalent among...
Sleep-Wake Cycles01:24

Sleep-Wake Cycles

Sleep is an essential physiological process vital to maintaining overall well-being. The reticular activating system (RAS), a network of neurons in the brainstem, regulates wakefulness and sleep. While it may seem passive, sleep consists of distinct cycles, each with its unique characteristics and functions. Two key sleep phases are non-rapid eye movement (NREM) and  rapid eye movement (REM).
NREM Sleep
NREM sleep comprises four progressive stages that seamlessly merge:
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...
Other Pulmonary Disorders01:17

Other Pulmonary Disorders

Respiratory disorders encompass a range of conditions with varying levels of severity. Asthma, marked by chronic airway inflammation and hypersensitivity, is one such condition. It can lead to airway obstruction due to factors like bronchial spasms, mucosal edema, increased mucus secretion, or epithelial damage. Asthma triggers are diverse, ranging from allergens to emotional upset, and treatment focuses on both immediate relief through bronchodilators and long-term inflammation suppression.
Understanding Sleep01:11

Understanding Sleep

Sleep, an essential biological state, involves significant reductions in physical activity, sensory awareness, and interaction with the environment. This complex physiological process is primarily regulated by specific brain regions, notably the hypothalamus and pons, which govern the sleep-wake cycle or circadian rhythm.
The circadian rhythm, a nearly 24-hour cycle, is deeply influenced by environmental light cues. Light exposure directly affects the hypothalamus, which in turn regulates...
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:

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Reply to "Clinical pathway implications of bilateral hypoglossal nerve stimulation for PAP-intolerant OSA".

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The effect of tongue strength and endurance in patients with obstructive sleep apnea.

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Drug-Induced Sleep Endoscopy (DISE) with Target Controlled Infusion (TCI) and Bispectral Analysis in Obstructive Sleep Apnea
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Drug-Induced Sleep Endoscopy (DISE) with Target Controlled Infusion (TCI) and Bispectral Analysis in Obstructive Sleep Apnea

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Physiology of sleep disordered breathing.

B Tucker Woodson1, Rose Franco

  • 1Division of Sleep Medicine, Department of Otolaryngology and Communication Sciences, Medical College of Wisconsin at Froedtert West, 9200 West Wisconsin Avenue, Milwaukee, WI 53226, USA. bwoodson@mcw.edu

Otolaryngologic Clinics of North America
|July 4, 2007
PubMed
Summary

Obstructive sleep apnea (OSA) stems from upper airway collapse due to anatomical and physiological factors. Understanding these mechanisms is key to developing new treatments for this common sleep disorder.

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Area of Science:

  • Sleep Medicine
  • Respiratory Physiology
  • Otorhinolaryngology

Background:

  • Obstructive sleep apnea (OSA) is a prevalent condition linked to upper airway abnormalities.
  • The severity of OSA is influenced by the interplay of airway structure and physiological processes.

Purpose of the Study:

  • To elucidate the complex interplay between upper airway anatomy and physiology in OSA.
  • To provide insights into the pathophysiology of airway collapse in OSA patients.

Main Methods:

  • This study reviews the current understanding of anatomical and physiological factors contributing to OSA.
  • Analysis of existing literature on upper airway mechanics and their role in sleep apnea.

Main Results:

  • A structurally compromised and collapsible upper airway is a primary risk factor for OSA.
  • Physiological mechanisms significantly modulate disease severity in individuals with predisposing airway anatomy.

Conclusions:

  • Understanding the pathophysiology of airway collapse is crucial for advancing OSA treatment.
  • Further research into these mechanisms may yield novel medical and surgical therapeutic strategies for OSA.