Respiratory Center


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respiratory center

[′res·prə‚tȯr·ē ¦sen·tər]
(physiology)
A large area of the brain involved in regulation of respiration.

Respiratory Center

 

several groups of nerve cells (neurons) located in various sections of the central nervous system, primarily in the reticular formation of the medulla oblongata. The continuous coordinated rhythmic activity of these neurons ensures the initiation of respiratory movements and their regulation in conformity with changes occurring in the body.

Impulses from the respiratory center enter the motor neurons of the anterior horns of the cervical and thoracic sections of the spinal cord, from which the excitation is transmitted to the respiratory musculature. The activity of the respiratory center is regulated humorally—that is, by the composition of the blood and interstitial fluid that bathe it. Its activity is also regulated by reflexes, in response to impulses entering from receptors in the respiratory, cardiovascular, motor, and other systems, as well as from the higher sections of the central nervous system. When entry of nerve impulses into the respiratory center is blocked, the respiratory center maintains its activity by so-called automatism of the respiratory center and is capable of ensuring respiratory movements.

References in periodicals archive ?
First, it has a stimulating effect on the respiratory centers in the brain;
Respiratory center adaptation occurs in response to chronically high [CO.
As the duration of breath holding during pranayama is gradually increased by the practice of pranayama so that the respiratory center is acclimatized to withstand higher and higher carbon-di-oxide concentrations in the alveoli and the blood.
Once it falls to a certain level, the respiratory center in the brain becomes stimulated and the person arouses briefly to take some quick, deep breaths to restore the blood oxygen level.
McBride, who is also director of the respiratory center at Children's Hospital Medical Center of Akron (Ohio).
This occurs despite the lack of respiratory disease or other factors that could impair ventilation such as restricted chest wall movement, excessive airway secretions, lung tissue damage or destruction, or impaired function of the respiratory center in the brain.
Premature infants may experience "apnea of prematurity" which is felt to be due to relative immaturity of the respiratory center in the brain stem which causes the infant to respond inefficiently to rising levels of carbon dioxide.
As the duration of breath holding during deep breathing is gradually increased by practice, the respiratory center is acclimatized to withstand higher and higher carbon dioxide concentrations in the alveoli and blood.
The blood oxygen saturation decreases during an episode of apnea, which ultimately activates the respiratory center in the brainstem.
Depression of the respiratory center such as with anesthetics, sedative (morphine), cerebral trauma or tumors.
4 In lethal H2S exposure, sulfides act on the respiratory centers of the brain causing respiratory paralysis.