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Nervous Control of Respiration
Dorsal Group of Neurons Ventral Group of Neurons Pneumotaxic Center Apneustic Center
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Respiratory Control centers in the Brain Stem
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Dorsal Respiratory Group
Generation of basic rhythm of respiration i.e. Ramp Signal Neurons are located with in the nucleus of tractus solitarius Role of Pre botzinger complex
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Ventral respiratory group of Neurons
Neurons are located in the nucleus ambiguus rostrally and the nucleus retroambiguus caudally Remains totally inactive during normal quiet respiration Provide powerful expiratory signals to the abdominal muscles during very heavy expiration
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Pneumotaxic Center Neurons are located dorsally in the nucleus parabrachialis of the upper pons Transmit signal to the dorsal respiratory group It controls the “switch-off ” point of the inspiratory ramp It primarily limits inspiration
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Apneustic Center Is situated in the lower part of pons
Sends signals to dorsal respiratory group of neurons to prevent the “Switch-off” of the inspiratory ramp signal. Controls intensity of inspiration
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