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Proceedings Paper

Functional stochastic resonance in human baroreflex induced by 1/f-type noisy galvanic vestibular stimulation
Author(s): Rika Soma; Shin Kwak; Yoshiharu Yamamoto
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Paper Abstract

We hypothesized that 1/f noise is more beneficial than the conventional white noise in optimizing the brain's response to a weak input signal, and showed that externally added 1/f noise outperforms white noise in sensitizing human baroreflex centers in the brain. We examined the compensatory heart rate response to weak periodic signal introduced at the venous blood pressure receptor, while adding either 1/f or white noise with the same variance to the brain stem by electrically stimulating the bilateral vestibular afferents cutaneously. This stochastic galvanic vestibular stimulation, activating the vestibulo-sympathetic pathway in the brain stem, optimized covariance between weak input signals and the heart rate responses both with 1/f and white noise. Further, the optimal noise level with 1/f noise was significantly lower than that with white noise, suggesting the functional benefit of 1/f noise for the neuronal information transfer in the brain.

Paper Details

Date Published: 30 April 2003
PDF: 8 pages
Proc. SPIE 5110, Fluctuations and Noise in Biological, Biophysical, and Biomedical Systems, (30 April 2003); doi: 10.1117/12.500315
Show Author Affiliations
Rika Soma, Univ. of Tokyo (Japan)
PRESTO, Japan Science and Technology Corp. (Japan)
Shin Kwak, Univ. of Tokyo (Japan)
Yoshiharu Yamamoto, Univ. of Tokyo (Japan)
PRESTO, Japan Science and Technology Corp. (Japan)


Published in SPIE Proceedings Vol. 5110:
Fluctuations and Noise in Biological, Biophysical, and Biomedical Systems
Sergey M. Bezrukov; Hans Frauenfelder; Frank Moss, Editor(s)

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