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Before we get started: what is a cough?

Giovanni A Fontana1

  • 1Department of Critical Care, University of Florence, Viale G B Morgagni, Florence, Italy. g.fontana@dac.unifi.it

Lung
|October 3, 2007
PubMed
Summary
This summary is machine-generated.

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Cough and expiration reflex (ER) are distinct airway defenses. Cough clears lower airways, while ER prevents aspiration. Accurately distinguishing these reflexes is crucial for quantitative analysis.

Area of Science:

  • Physiology
  • Respiratory Medicine
  • Neuroscience

Background:

  • Cough is a vital airway defensive reflex.
  • The expiration reflex (ER) is a related but distinct reflex.
  • Accurate differentiation of these reflexes is clinically significant.

Purpose of the Study:

  • To differentiate cough from the expiration reflex (ER).
  • To elucidate the distinct physiological functions of cough and ER.
  • To highlight the clinical importance of identifying cough epochs.

Main Methods:

  • Describing the physiological mechanisms of cough.
  • Defining the expiration reflex (ER) based on its motor acts.
  • Explaining the clinical definition of a cough epoch.

Related Experiment Videos

Main Results:

  • Cough involves a preparatory inspiratory phase followed by forced expiration.
  • The expiration reflex (ER) lacks a preparatory inspiration.
  • Cough clears lower airways; ER prevents aspiration.

Conclusions:

  • Cough and ER are distinct airway reflexes with different functions.
  • Accurate identification and measurement of cough epochs, including ERs, are necessary for quantitative description.