Retrieving "Atelectasis" from the archives

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1. Sighing

   Linked via "atelectasis"

   The mechanics of the sigh are distinct from a normal breath or a gasp. The process begins with an inspiratory phase where the diaphragm and external intercostal muscles contract forcefully, raising the lung volume by approximately 150% above the resting functional residual capacity (FRC)/). This hyperinflation is immediately followed by a passive, slow expiratory phase.
   Recent [neurophysiological studies](/entries/neuro…