Describe the dorsal respiratory group (DRG)
What will be an ideal response?
The dorsal respiratory group (DRG) consists mostly of inspiratory neurons whose descending fibers terminate on the motor neurons that supply the inspiratory muscles. When the DRG inspiratory neurons fire, they stimulate the inspiratory muscles and inspiration takes place; when they cease firing, the inspiratory muscles relax and passive expiration occurs. Expiration is brought to an end as the inspiratory neurons fire again. The DRG has important interconnections with the ventral respiratory group.
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