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- W2495302621 startingPage "e0159427" @default.
- W2495302621 abstract "Vertebrate semicircular canals (SCC) first appeared in the vertebrates (i.e. ancestral fish) over 600 million years ago. In SCC the principal mechanoreceptors are hair cells, which as compared to cochlear hair cells are distinctly longer (70 vs. 7 μm), 10 times more compliant to bending (44 vs. 500 nN/m), and have a 100-fold higher tip displacement threshold (< 10 μm vs. <400 nm). We have developed biomechanical models of vertebrate hair cells where the bundle is approximated as a stiff, cylindrical elastic rod subject to friction and thermal agitation. Our models suggest that the above differences aid SCC hair cells in circumventing the masking effects of Brownian motion noise of about 70 nm, and thereby permit transduction of very low frequency (<10 Hz) signals. We observe that very low frequency mechanoreception requires increased stimulus amplitude, and argue that this is adaptive to circumvent Brownian motion overload at the hair bundles. We suggest that the selective advantage of detecting such low frequency stimuli may have favoured the evolution of large guiding structures such as semicircular canals and otoliths to overcome Brownian Motion noise at the level of the mechanoreceptors of the SCC." @default.
- W2495302621 created "2016-08-23" @default.
- W2495302621 creator A5021170869 @default.
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- W2495302621 date "2016-07-22" @default.
- W2495302621 modified "2023-10-13" @default.
- W2495302621 title "Semicircular Canals Circumvent Brownian Motion Overload of Mechanoreceptor Hair Cells" @default.
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- W2495302621 doi "https://doi.org/10.1371/journal.pone.0159427" @default.
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