Diving Response

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The physiologic responses—apnoea, bradycardia, peripheral vasconstriction, increased arterial blood pressure—to hypoxia, which were first described in diving simulations of aquatic animals
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[2,3] The elicitation of the diving response by cold stimulation is derived from the upper part of the face innervated by the ophthalmic part of the trigeminal nerve (forehead and eye area).
Simulated human diving and heart rate: making the most of the diving response as a laboratory exercise.
Mechanism of the human diving response. Integr Physiol Behav Sci 1994;29:6-16.
In response to a series of 7 bat pulses (at 7/s), median thresholds for leg steering were 49 dB SPL (n=8 for all measurements); median thresholds for wingbeat interruption were at 53 dB SPL and the diving response occurred at 63 dB SPL (Fig.