Facial immersion in cold water enhances cerebral blood velocity during breath-hold exercise in humans.

@article{Kjeld2009FacialII,
  title={Facial immersion in cold water enhances cerebral blood velocity during breath-hold exercise in humans.},
  author={Thomas Kjeld and Frank Christian Pott and Niels H Secher},
  journal={Journal of applied physiology},
  year={2009},
  volume={106 4},
  pages={1243-8}
}
The diving response is initiated by apnea and facial immersion in cold water and includes, besides bradycardia, peripheral vasoconstriction, while cerebral perfusion may be enhanced. This study evaluated whether facial immersion in 10 degrees C water has an independent influence on cerebral perfusion evaluated as the middle cerebral artery mean flow velocity (MCA V(mean)) during exercise in nine male subjects. At rest, a breath hold of maximum duration increased the arterial carbon dioxide… CONTINUE READING

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