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APS » Journals » Phys. Rev. Lett. » Volume 85 » Issue 17
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Phys. Rev. Lett. 85, 3740–3743 (2000)

Functional Stochastic Resonance in the Human Brain: Noise Induced Sensitization of Baroreflex System

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Ichiro Hidaka1, Daichi Nozaki2, and Yoshiharu Yamamoto1,*
1Educational Physiology Laboratory, Graduate School of Education, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
2Department of Motor Dysfunction, Research Institute of National Rehabilitation Center for the Disabled, 4-1 Namiki, Tokorozawa, Saitama 359-8555, Japan

Received 1 May 2000; published in the issue dated 23 October 2000

We demonstrate experimentally that noise can enhance the homeostatic function in the human blood pressure regulatory system. The results show that the compensatory heart rate response to the weak periodic signal introduced at the venous blood pressure receptor is optimized by adding noise to the arterial blood pressure receptor. We conclude that this functional stochastic resonance most likely results from the interaction of noise with signal in the brain stem, where the neuronal inputs from these two different receptors first join together.

© 2000 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.85.3740
DOI:
10.1103/PhysRevLett.85.3740
PACS:
87.19.Hh, 05.40.Ca, 87.80.-y

*Corresponding author. Email address: yamamoto@p.u-tokyo.ac.jp

 
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