respiratory center


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res·pi·ra·to·ry cen·ter

the region in the medulla oblongata concerned with integrating afferent information to determine the signals to the respiratory muscles; the inspiratory and expiratory centers considered together.

respiratory center

a group of nerve cells in the pons and medulla of the brain that controls the rhythm of breathing in response to changes in levels of oxygen, carbon dioxide, and hydrogen ions in the blood and cerebrospinal fluid. Such changes activate central and peripheral chemoreceptors, which send impulses to the respiratory center, triggering an increase or a decrease in the breathing rate. In patients with retention of carbon dioxide, the respiratory center becomes insensitive to carbon dioxide, and the main stimulus to ventilation is hypoxemia. If such patients inhale air with a high oxygen content, breathing may be depressed, leading to a further rise in blood carbon dioxide levels. The respiratory center is inhibited by barbiturates, anesthetics, tranquilizing agents, and morphine. See also hyperventilation, hypoventilation, hypoxia.
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Respiratory centers of the brainstem

res·pi·ra·to·ry cen·ter

(res'pir-ă-tōr-ē sen'tĕr)
The region in the medulla oblongata concerned with integrating afferent information to determine the signals to the respiratory muscles; the inspiratory and expiratory centers considered together.

respiratory center

A region in the medulla oblongata of the brainstem that regulates movements of respiration. This area consists of an inspiratory center and an expiratory center. The pons contains the apneustic center and the pneumotaxic center.
See also: center
References in periodicals archive ?
Controls are located in the respiratory centers of the central nervous system.
The respiratory center which would have otherwise started exhalation is now helpless against the strong voluntary control from the cortex.
This ultimately triggers the stimulation of the respiratory center in the brain, which causes the person to awaken briefly to take some quick, deep breaths.
This is also felt to be due to respiratory center immaturity but is NOT considered abnormal unless associated with decrease heat rate or color change.
The respiratory center consists of several nuclei (i.
In patient's with chronic carbon dioxide retention, however, the respiratory center becomes insensitive to carbon dioxide and hypoxemia provides the main stimulus to respiration.
Some compounds in smoke act as anesthetics, putting the brain to sleep and shutting down the brain's respiratory centers.
CSA generally arises from damage to the respiratory centers in the brain from cardiovascular disease, such as lack of oxygenation to the brain from stroke or poor cerebral circulation.
In conclusion, not only is activity of the inspiratory rib cage muscles increased during a failed weaning trial, but respiratory centers also recruit sternomastoid and expiratory muscles.
In infants, RSV can not only infect the entire respiratory tree, but it can sometimes affect the respiratory centers in the central nervous system resulting in apnea, or cessation of breathing.
Impulses from the carotid bodies travel via the glossopharyngeal (9th) cranial nerve to the central respiratory centers in the brain stem to stimulate or suppress breathing as needed.