expiratory center

expiratory center

Etymology: L, expirare, to breath out; Gk, kentron, center

one of several regions of the medulla, responsible for control of respiration. It is a subregion specifically involved in carrying out the activity of expiration.

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center

a point from which a process starts, especially a plexus or ganglion giving off nerves that control a function.

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accelerating center

one in the brainstem involved in acceleration of heart action.

appetite center

located in the hypothalamus; controls appetite.

auditory center

the center for hearing, in the more anterior of the transverse temporal gyri.

cardioinhibitory center

one in the medulla oblongata that exerts an inhibitory influence on the heart.

deglutition center

a nerve center in the medulla oblongata that controls swallowing.

diaphragmatic center

see diaphragmatic tendon.

emetic center

located in the reticular formation of the brainstem, this center controls vomiting.

eructation center

controls eructation in ruminants; located in the medulla oblongata.

expiratory center

one of the four respiratory centers (see below).

germinal center

the area in the center of a lymph node containing aggregations of actively proliferating lymphocytes.

gustatory center

the cerebral center supposed to control taste.

inspiratory respiratory center

one of the four respiratory centers.

lymph node germinal center

centers in lymph nodes where lymphocytes are produced.

medullary respiratory center

the center in the medulla oblongata that coordinates respiratory movements.

motor center

any center that originates, controls, inhibits or maintains motor impulses.

nerve center

a collection of nerve cells in the central nervous system that are associated together in the performance of some particular function.

center of ossification

see ossification center.

perineal center

see perineal body.

reflex center

any nerve center at which afferent sensory information is converted into efferent motor impulses.

respiratory c's

a series of the centers (the apneustic, pneumotaxic and medullary respiratory centers) in the medulla and pons that coordinate respiratory movements.

center-surround retinal organization

the arrangement of cells in the receptive field of the retina; the sensitivity of a certain spot in the retina is affected by what is occurring in adjacent areas.

swallowing center

deglutition center.

thermoregulatory c's

hypothalamic centers regulating the conservation and dissipation of heat.

vasomotor center

a combination of two centers in the reticular formation of the brainstem; includes a pressor and a depressor center.

vomiting center

see emetic center (above).

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expiratory

relating to or employed in the expiration of air from the lungs.

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expiratory center

the nerve center in the descending reticular formation which terminates inspiration and triggers the commencement of expiratory movements.

expiratory groan

a groan with each expiration; usually an expression of severe pain or extreme fatigue.

expiratory reserve volume

the volume of air which the patient can still exhale after the tidal volume has been exhaled.