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Journal of Comparative Physiology B

, Volume 189, Issue 6, pp 685–692 | Cite as

A robust diving response in the laboratory mouse

  • Elissa M. Hult
  • Mark J. Bingaman
  • Steven J. SwoapEmail author
Original Paper

Abstract

The diving response is a coordinated physiological response to submersion under water and has been documented amongst all mammals tested to date. The physiological response consists of three primary reflexes: an immediate bradycardia, apnea, and selective constriction of peripheral blood vessels. We hypothesized that mice would exhibit a diving response upon voluntary submersion into water typically seen in other mammals. In this study, telemeters that measure arterial pressure were implanted into male and female C57Bl/6J mice. These mice were trained to voluntarily dive underwater for a distance of 40 cm over a 4–6 s period. Just before the dive, the interbeat interval (IBI) was 87 ± 6 ms (mean ± SD) and diastolic pressure was 99 ± 14 mmHg. Underwater submersion caused (1) a dramatic bradycardia immediately at the onset of each dive, as IBI increased to 458 ± 104 ms, and (2) a large drop in diastolic pressure, to 56 ± 16 mmHg despite the elevation in peripheral resistance. Mice experienced a short bout (~ 2 s) of hypertension (diastolic pressure rose to 131 ± 17 mmHg) upon emergence. The bradycardia and hypotension appeared to be vagally mediated, since both these responses were blocked with atropine pre-treatment. These data demonstrate that the mouse exhibits a robust diving response upon voluntary submersion into water.

Keywords

Heart rate Interbeat interval Blood pressure Dive Reflex 

Notes

Acknowledgements

The authors would like to thank Maia Hare and Cordelia Chan for their help in acquiring some of the data in this work. The authors also thank the animal care staff at Williams College. We also thank the divisional funding resource at Williams College for supporting this work.

Funding

The work was supported by an internal grant from Williams College.

Supplementary material

Supplementary material 1 (MP4 24884 kb)

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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2019

Authors and Affiliations

  1. 1.Department of BiologyWilliams CollegeWilliamstownUSA
  2. 2.Molecular and Integrative Physiology Graduate ProgramUniversity of MichiganAnn ArborUSA

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