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CENTRAL CONTROL OF RESPIRATION

Anatomy-Thorax

CENTRAL CONTROL OF RESPIRATION

A number of cell groups in the reticular formation of the pons and medulla are responsible for the motor control of the respiratory cycle.

1. INSPIRATORY CENTRE (DORSAL RESPIRATORY GROUP) - b/l groups of cells in the region of the nucleus of the tractus solitarius in the dorsum of the medulla which are responsible for the rhymicity of breathing . Their axons pass down to the contralateral phrenic nerve neurons.

2. VENTRAL RESPIRATORY GROUP - b/l groups of cells in the region of the nucleus ambiguus in the ventrum of the medulla which influence the abdominal + intercostal muscles.

3. PNEUMOTAXIC CENTRE - situated near the superior cerebellar peduncle, which controls the changeover from inspiration to expiration by modifying the activity of the medullary centres.

4. APNEUSTIC CENTRE - ill-defined, located in the lower pons, concerned with the duration of the respiratory phases.

5. The cerebral cortex, diencephalon and hypothalamus also exert their influence on respiration, either via the above-mentioned centres or directly onto the anterior horn cells innervating the muscles of respiration.


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REFERENCES

1. Mcminn. (2003). Last's Anatomy. Elsevier Australia. ISBN:0729537528. Read it at Google Books - Find it at Amazon
2. Netter, F. H. (2019). Atlas of human anatomy. Philadelphia, PA: Elsevier.
3. Image: no reference available.

Ⓒ A. Manickam 2018

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