What happens to the duration of the interval between exhalation and inspiration after hyperventilation?

An experiment was undertaken in which the breathing rate and duration etc were counted after hyperventilation. What happens to the duration of the interval between exhalation and inspiration after hyperventilation?

It increases….let me explain. Normal time between inspiration end expiration, is determined by the triggering of the peumotaxic center in the medulla oblongata (reticular substance ventral or anterior to the floor of IV ventricle)
as CO2 builts up, there is a "breaking point" in which the chemorreceptors in the brain, discharge, and then, inspiration comes…this is in normal circumstances, breathing at rest
Suppose now, you breath forcibly deeper and faster?
The CO2 in the blood wil decrease, because most of it, will be gone momentarily with the exhalated air……so it takes longer to stimulate the chemoreceptors in the medulla oblongata, carotid bifurcation, aortic wall, etc. because you need good 3-4 minutes to "rebuild" or build up again from normal metabolism, the normal concentration of CO2 normally found in plasma ( 28-32 mm Hg)

One Response to “What happens to the duration of the interval between exhalation and inspiration after hyperventilation?”

  1. Karl S, on May 3rd, 2007 at 12:40 am Said:

    It increases….let me explain. Normal time between inspiration end expiration, is determined by the triggering of the peumotaxic center in the medulla oblongata (reticular substance ventral or anterior to the floor of IV ventricle)
    as CO2 builts up, there is a "breaking point" in which the chemorreceptors in the brain, discharge, and then, inspiration comes…this is in normal circumstances, breathing at rest
    Suppose now, you breath forcibly deeper and faster?
    The CO2 in the blood wil decrease, because most of it, will be gone momentarily with the exhalated air……so it takes longer to stimulate the chemoreceptors in the medulla oblongata, carotid bifurcation, aortic wall, etc. because you need good 3-4 minutes to "rebuild" or build up again from normal metabolism, the normal concentration of CO2 normally found in plasma ( 28-32 mm Hg)
    References :

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