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Ventilatory drive during face immersion in man.

M R Mukhtar, J M Patrick

The Journal of Physiology

|January 1, 1986

Summary

This summary is machine-generated.

Face immersion in cold water reduces ventilatory drive, extending breath-hold times. This finding suggests a link to the mammalian diving response, beneficial for breath-hold activities.

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Area of Science:

Physiology
Human Physiology
Respiratory Physiology

Background:

The 'diving response' includes cardiovascular changes that aid breath-hold diving.
Investigating ventilatory drive during face immersion may reveal adaptations for breath-holding.

Purpose of the Study:

To determine if face immersion in cold water reduces ventilatory drive in humans.
To assess if this reduction is a component of the diving response.

Main Methods:

Four experimental series measured ventilatory drive indirectly via breath-holding time and directly via minute ventilation.
Experiments involved cold and warm water face immersion, CO2 breathing, and exercise with cold/warm packs.
Control experiments used warm water immersion or forearm immersion.

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Main Results:

Cold face immersion increased breath-holding time by 14% and caused transient hypoventilation (10-13%).
Face immersion led to a modest reduction in ventilatory drive, with face temperatures dropping by ~10°C.
Control conditions (warm water, forearm immersion) did not produce these effects.

Conclusions:

Face immersion in cold water induces a modest reduction in human ventilatory drive.
This response appears to be an integral part of the mammalian diving response.