Relevant bibliographies by topics / Outer hair cell

Academic literature on the topic 'Outer hair cell'

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Published: 4 June 2021
Last updated: 20 February 2023

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Journal articles on the topic "Outer hair cell"

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Hoben, Richard, and Mark A. Parker. "Outer Hair Cell Damage." Hearing Journal 69, no. 6 (June 2016): 10. http://dx.doi.org/10.1097/01.hj.0000484546.98172.7a.

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Ashmore, Jonathan. "Cochlear Outer Hair Cell Motility." Physiological Reviews 88, no. 1 (January 2008): 173–210. http://dx.doi.org/10.1152/physrev.00044.2006.

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Normal hearing depends on sound amplification within the mammalian cochlea. The amplification, without which the auditory system is effectively deaf, can be traced to the correct functioning of a group of motile sensory hair cells, the outer hair cells of the cochlea. Acting like motor cells, outer hair cells produce forces that are driven by graded changes in membrane potential. The forces depend on the presence of a motor protein in the lateral membrane of the cells. This protein, known as prestin, is a member of a transporter superfamily SLC26. The functional and structural properties of prestin are described in this review. Whether outer hair cell motility might account for sound amplification at all frequencies is also a critical question and is reviewed here.
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Santos-Sacchi, J. "Harmonics of outer hair cell motility." Biophysical Journal 65, no. 5 (November 1993): 2217–27. http://dx.doi.org/10.1016/s0006-3495(93)81247-5.

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Lue, Allen Jung-Chen, Hong-Bo Zhao, and William E. Brownell. "Chlorpromazine Alters Outer Hair Cell Electromotility." Otolaryngology–Head and Neck Surgery 125, no. 1 (July 2001): 71–76. http://dx.doi.org/10.1067/mhn.2001.116446.

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Deo, Niranjan, and Karl Grosh. "Simplified nonlinear outer hair cell models." Journal of the Acoustical Society of America 117, no. 4 (April 2005): 2141–46. http://dx.doi.org/10.1121/1.1871753.

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Iwasa, K. H., M. Ospeck, and X. x. Dong. "S02 Physical Aspect of Outer Hair Cell motility : Outer Hair Cell Motility as Two-State Piezoelectricity." Proceedings of the Bioengineering Conference Annual Meeting of BED/JSME 2001.13 (2001): 4–5. http://dx.doi.org/10.1299/jsmebio.2001.13.4.

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Knirsch, M., N. Brandt, C. Braig, S. Kuhn, B. Hirt, S. Munkner, M. Knipper, and J. Engel. "Persistence of Cav1.3 Ca2+ Channels in Mature Outer Hair Cells Supports Outer Hair Cell Afferent Signaling." Journal of Neuroscience 27, no. 24 (June 13, 2007): 6442–51. http://dx.doi.org/10.1523/jneurosci.5364-06.2007.

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Biswas, Joyshree, Robert S. Pijewski, Rohit Makol, Tania G. Miramontes, Brianna L. Thompson, Lyndsay C. Kresic, Alice L. Burghard, Douglas L. Oliver, and David C. Martinelli. "C1ql1 is expressed in adult outer hair cells of the cochlea in a tonotopic gradient." PLOS ONE 16, no. 5 (May 12, 2021): e0251412. http://dx.doi.org/10.1371/journal.pone.0251412.

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Hearing depends on the transduction of sounds into neural signals by the inner hair cells of the cochlea. Cochleae also have outer hair cells with unique electromotile properties that increase auditory sensitivity, but they are particularly susceptible to damage by intense noise exposure, ototoxic drugs, and aging. Although the outer hair cells have synapses on afferent neurons that project to the brain, the function of this neuronal circuit is unclear. Here, we created a novel mouse allele that inserts a fluorescent reporter at the C1ql1 locus which revealed gene expression in the outer hair cells and allowed creation of outer hair cell-specific C1ql1 knockout mice. We found that C1ql1 expression in outer hair cells corresponds to areas with the most sensitive frequencies of the mouse audiogram, and that it has an unexpected adolescence-onset developmental timing. No expression was observed in the inner hair cells. Since C1QL1 in the brain is made by neurons, transported anterogradely in axons, and functions in the synaptic cleft, C1QL1 may serve a similar function at the outer hair cell afferent synapse. Histological analyses revealed that C1ql1 conditional knockout cochleae may have reduced outer hair cell afferent synapse maintenance. However, auditory behavioral and physiological assays did not reveal a compelling phenotype. Nonetheless, this study identifies a potentially useful gene expressed in the cochlea and opens the door for future studies aimed at elucidating the function of C1QL1 and the function of the outer hair cell and its afferent neurons.
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Harasztosi, Csaba, Entcho Klenske, and Anthony W. Gummer. "Vesicle traffic in the outer hair cell." European Journal of Neuroscience 54, no. 3 (July 5, 2021): 4755–67. http://dx.doi.org/10.1111/ejn.15331.

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Srinivasan, Sridhar, Andreas Keil, Kyle Stratis, Aaron F. Osborne, Colin Cerwonka, Jennifer Wong, Brenda L. Rieger, Valerie Polcz, and David W. Smith. "Interaural attention modulates outer hair cell function." European Journal of Neuroscience 40, no. 12 (October 10, 2014): 3785–92. http://dx.doi.org/10.1111/ejn.12746.

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Dissertations / Theses on the topic "Outer hair cell"

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Lu, Timothy K. (Timothy Kuan-Ta) 1981. "A feedback analysis of outer hair cell dynamics." Thesis, Massachusetts Institute of Technology, 2003. http://hdl.handle.net/1721.1/29677.

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Thesis (M.Eng. and S.B.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2003.
Includes bibliographical references (leaves 144-146).
Outer hair cells (OHCs) generate active forces in the mammalian cochlea. Acting as cochlear amplifiers, OHCs can counteract viscous drag, generating high gain at characteristic frequencies and allowing for the sharp frequency selectivity and sensitivity observed in mammals. Excitatory displacement of the basilar membrane causes depolarization of OHC membrane potentials which results in contraction. The motor protein prestin is driven by receptor potentials. However, low-pass filtering by the plasma membrane should severely attenuate the receptor potential at high frequencies (> 100 kHz) where mammalian hearing has been observed. Thus, an open question is how OHCs can respond at these high frequencies despite their low frequency cutoff. Inspired by the use of feedback in mechanical and electrical systems to accelerate slow poles, I demonstrate that negative feedback from the coupling of two mechanical modes of vibration can lead to a membrane time constant speedup and a sharpening of the mechanical response.
y Timothy K. Lu.
M.Eng.and S.B.
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Muallem, Daniella. "An anion transporter theory of the outer hair cell motor protein." Thesis, University College London (University of London), 2005. http://discovery.ucl.ac.uk/1444859/.

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This thesis addresses the mechanism of electromotility in outer hair cells (OHCs) of the mammalian cochlea. Prestin, a protein densely packed in the lateral membrane is assumed to drive electromotility. A current hypothesis is that prestin is an incomplete transporter, shuttling chloride across the membrane without allowing it to dissociate at the extracellular surface. In this thesis kinetic models are formulated to show that this hypothesis cannot reproduce the previously published experimental data from electrical recordings. However an alternative model of prestin as an anion exchanger (modelled here as a chloride/sulphate exchanger) is formulated, which can reproduce many of the experimental observations. In this model the experimentally observed charge movements across the cell membrane are produced by the translocation of a chloride ion combined with some intrinsic charged residues. To further test the predictions of the model, patch clamp recordings were performed on dissociated OHCs, in the excised patch and whole-cell configurations. The OHC non-linear capacitance (NLC) depended on the concentration of intracellular chloride (Clj). When Clj was removed from internal and external solutions, a residual NLC (-15- 30%) was found, which was consistent with the predictions of the model for contaminant levels of Clj ( 10uM). Additionally the effect on the NLC of reducing Clj depended on the species of anion used to replace Clj. The largest effect was produced by replacement with sulphate, whilst the smallest effect was produced by replacement with glutamate. These findings support the model. Finally two potential causes for previous controversy in the literature were identified. 1) The NLC depended on the recording configuration when Clj was reduced below 1-1 OmM. 2) The dependence of the NLC on Clj was affected when Tris+ replaced Na+ as the major cation in solutions.
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Lopez, Dominic. "The Effect of Infrasound on the Cochlear Microphonic in Guinea Pigs." Thesis, The University of Sydney, 2016. http://hdl.handle.net/2123/16446.

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Recent in vivo guinea pig studies have revealed that the cochlea’s electrical response to infrasound (< 20Hz) is significantly larger than the response to low-frequency (100 – 500Hz) tones. Moreover, manipulations of cochlear responses by infrasound suggest that mechanoelectrical transduction channels on hair cells are not the only ion channels whose conductance is modulated by pressure fluctuations. It has been suggested that this ‘infrasound phenomena’ could be related to an inherent homeostatic regulation of cochlear fluid potentials. Here, we have performed a series of in vivo electrophysiological investigations in guinea pigs to explore the origin of this phenomenon, and its possible role in endolymph regulation. We first characterized the infrasound-induced changes, varying stimulus frequency and recording location. We then also performed a series of physiological and pharmacological manipulations to explore potential biological mechanisms involved. We also developed various mathematical models to aid the interpretation of our experimental results, and investigate candidate mechanisms underlying the infrasound phenomena. Our results suggest that the infrasound response cannot be attributed to infrasound induced changes in the conductance of the mechano-electrical transduction channels on the stereocilia of hair cells. However, infrasound does appear to produce a modulation of the electrical conductance of the Organ of Corti. On the basis of our experimental manipulations, which were targeted towards manipulating hair cell function, we tentatively suggest that infrasound stimulation induces slow-changes in the intracellular calcium concentration in hair cells, cyclically altering the basolateral membrane conductance. That said, there are a few experimental observations that cannot yet be explained by our experimental or modelling data, and further research is required to more clearly demonstrate that infrasound manipulates the conductance of the basolateral membrane of hair cells.
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Jiang, Beibei. "A biophysical model of the role of the outer hair cell in cochlear nonlinearity." Thesis, University of Plymouth, 2010. http://hdl.handle.net/10026.1/2235.

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It has been observed that the response characteristics of the basilar membrane in normal living cochleae are both frequency and level-sensitive (Robles & Ruggero 2001). The quality factor of the tuning curve is large at low sound levels and decreases as the sound level increases, and the peak of the tuning curve moves towards lower frequencies as the sound level increases. The current study proposes a nonlinear cochlear model that responds adaptively to the incoming sounds via feedback control arising from the mechanical attributes of the cochlear partition. These attributes are dependent on the membrane potential of the outer hair cells (He & Dallos 1999, Santos-Sacchi 1992). A parallel resistor-capacitor circuit analogy of the outer hair cell with related perilymph and endolymph potentials is designed to simulate sound-evoked changes in the outer hair cell membrane potential. Nonlinear responses of the cochlea, such as compression and two tone suppression, can be explained using this model. Furthermore, it has been shown that the basilar membrane response to pure tone stimuli is attenuated by directly stimulating the medial olivo-cochlear bundle using electrical shocks (Cooper & Guinan 2006). Basilar membrane responses in the presence of efferent stimulation can be demonstrated using the same model, through modulation of the outer hair cell rnembrane potential. The proposed model provides a unified account of the combined effect of sounds and efferent stimulation on cochlear responses.
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Wright, Daniel. "Anatomical and electrophysiological investigation of the distribution of acetylcholine receptors in the post synaptic membrane of mammalian cochlear outer hair cells." Thesis, Keele University, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.250420.

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Battaglia, Alex. "Ras activation contributes to outer hair cell apoptosis in the basal turn of the cochlea after cisplatin and gentamicin exposure /." Diss., Connect to a 24 p. preview or request complete full text in PDF format. Access restricted to UC campuses, 2002. http://wwwlib.umi.com/cr/ucsd/fullcit?p3064454.

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Bell, James Andrew, and andrew bell@anu edu au. "The Underwater Piano: A Resonance Theory of Cochlear Mechanics." The Australian National University. Research School of Biological Sciences, 2006. http://thesis.anu.edu.au./public/adt-ANU20080706.141018.

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This thesis takes a fresh approach to cochlear mechanics. Over the last quarter of a century, we have learnt that the cochlea is active and highly tuned, observations suggesting that something may be resonating. Rather than accepting the standard traveling wave interpretation, here I investigate whether a resonance theory of some kind can be applied to this remarkable behaviour.¶ A historical survey of resonance theories is first conducted, and advantages and drawbacks examined. A corresponding look at the traveling wave theory includes a listing of its short-comings.¶ A new model of the cochlea is put forward that exhibits inherently high tuning. The surface acoustic wave (SAW) model suggests that the three rows of outer hair cells (OHCs) interact in a similar way to the interdigital transducers of an electronic SAW device. Analytic equations are developed to describe the conjectured interactions between rows of active OHCs in which each cell is treated as a point source of expanding wavefronts. Motion of a cell launches a wave that is sensed by the stereocilia of neighbouring cells, producing positive feedback. Numerical calculations confirm that this arrangement provides sharp tuning when the feedback gain is set just below oscillation threshold.¶ A major requirement of the SAW model is that the waves carrying the feedback have slow speed (5-200 mm/s) and high dispersion. A wave type with the required properties is identified - a symmetric Lloyd-Redwood wave (or squirting wave) - and the physical properties of the organ of Corti are shown to well match those required by theory.¶ The squirting wave mechanism may provide a second filter for a primary traveling wave stimulus, or stand-alone tuning in a pure resonance model. In both, cyclic activity of squirting waves leads to standing waves, and this provides a physical rendering of the cochlear amplifier. In keeping with pure resonance, this thesis proposes that OHCs react to the fast pressure wave rather than to bending of stereocilia induced by a traveling wave. Investigation of literature on OHC ultrastructure reveals anatomical features consistent with them being pressure detectors: they possess a cuticular pore (a small compliant spot in an otherwise rigid cell body) and a spherical body within (Hensens body) that could be compressible. I conclude that OHCs are dual detectors, sensing displacement at high intensities and pressure at low. Thus, the conventional traveling wave could operate at high levels and resonance at levels dominated by the cochlear amplifier. ¶ The latter picture accords with the description due to Gold (1987) that the cochlea is an ‘underwater piano’ - a bank of strings that are highly tuned despite immersion in liquid.¶ An autocorrelation analysis of the distinctive outer hair cell geometry shows trends that support the SAW model. In particular, it explains why maximum distortion occurs at a ratio of the two primaries of about 1.2. This ratio also produces near-integer ratios in certain hair-cell alignments, suggesting that music may have a cochlear basis.¶ The thesis concludes with an evaluation and proposals to experimentally test its validity.
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Gilbert, Benjamin Lawrence. "ACF7 DEFICIENCY DOES NOT IMPAIR AUDITORY HAIR CELL DEVELOPMENT OR HEARING FUNCTION." Case Western Reserve University School of Graduate Studies / OhioLINK, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=case1619801135718899.

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Nam, Hui S. Ph D. (Hui Sok) Massachusetts Institute of Technology. "Low-frequency bias-tone effects on auditory-nerve responses to clicks and tones : investigating multiple outer-hair-cell actions on auditory-nerve firing." Thesis, Massachusetts Institute of Technology, 2011. http://hdl.handle.net/1721.1/68455.

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Thesis (Ph. D.)--Harvard-MIT Division of Health Sciences and Technology, 2011.
Cataloged from PDF version of thesis.
Includes bibliographical references.
Active motility in outer hair cells (OHCs) amplifies basilar-membrane (BM) and auditory-nerve (AN) responses to low-level sounds. The recent finding that medial olivocochlear (MOC) efferents (which innervate OHCs) inhibit AN initial peak (ANIP) responses from mid-to-high-level clicks, but do not inhibit initial BM responses, suggests a coupling of OHC motility to inner-hair-cell (IHC) stereocilia that is not through the BM. The main thesis objective was to test whether different OHC mechanisms produce AN responses to low-level sounds versus ANIP from mid-to-high-level clicks by comparing the suppressive effects of low-frequency "bias-tones" on these responses. Bias tones suppress by pushing OHC stereocilia into low-slope regions of their mechanoelectric transduction functions thereby lowering OHC amplification, particularly for probe tones near an AN-fiber's characteristic frequency (CF). This suppression occurs at opposite bias-tone phases, with one suppression typically larger than the other. Bias-tone effects were measured on cat AN-fiber responses using 50 Hz bias tones. In the first thesis part, bias-tone suppressive effects on AN responses to low-level clicks and low-level CF-tones were found to be similar, as expected but never previously shown. Then, in the main thesis focus, bias-tone suppressions of AN responses to low-level clicks and ANIP responses were studied. Both responses were suppressed twice each bias-tone cycle, but their major suppressions were at opposite bias-tone phases, which indicates that both ANIP and low-level AN responses depend on the slope of OHCstereocilia mechanoelectric-transduction, but with some significant difference. In the last thesis part, bias-tone suppression effects on low-CF (<4 kHz) AN-fiber responses to low-level CF and off-CF (by >0.7 octaves) tones were studied. Previous work found differences in AN-response group delays between CF and off-CF frequency regions that might arise from two different IHC-drive mechanisms, and the objective was to test this hypothesis. Our results showed similar bias-tone effects in both regions. Overall, the results demonstrate differences and similarities in the OHC mechanisms that produce ANIP and traditional, low-level cochlear amplification, and the results are consistent with the ANIP drive coupling OHC motility to IHC stereocilia without going through BM motion.
by Hui S. Nam.
Ph.D.
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Harrison, Ryan T. "Effect of Changes to the Circadian Rhythm on Susceptibility to Noise- and Drug-Induced Hearing Losses." The Ohio State University, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=osu1574719906038686.

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Books on the topic "Outer hair cell"

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Iwasa, Kuni H. Electromotility of outer hair cells. Oxford University Press, 2010. http://dx.doi.org/10.1093/oxfordhb/9780199233397.013.0006.

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Mason, Peggy. Audition. Oxford University Press, 2017. http://dx.doi.org/10.1093/med/9780190237493.003.0016.

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Hearing loss is devastating because it prevents communication through verbal language and thereby produces social isolation. The experience of hearing loss or deafness is the most common sensory deficit. The experience of affected individuals is highly variable because it depends on age of onset and treatment efficacy, among many factors. The roles of the external and middle ears in conduction and of the internal ear in sensorineural processing are used as a framework for understanding common forms of hearing loss. The contributions of inner and outer hair cells to cochlear function are detailed. How cochlear amplification results from the actions of prestin in outer hair cells is explained. The roles of age, noise, genetic background, and environmental factors in presbyacusis are considered. Approaches to hearing loss, including cochlear implants and sign language, are discussed. Finally, the brain regions involved in speech production and comprehension are detailed.
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Rinehart, Dawn Reneé. Ultrastructural study of the outer hair cells of the cochlea. 1996.

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Book chapters on the topic "Outer hair cell"

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Holley, Matthew C. "Outer Hair Cell Motility." In Springer Handbook of Auditory Research, 386–434. New York, NY: Springer New York, 1996. http://dx.doi.org/10.1007/978-1-4612-0757-3_7.

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Woodson, Erika. "Outer Hair Cell (OHC)." In Encyclopedia of Otolaryngology, Head and Neck Surgery, 2035. Berlin, Heidelberg: Springer Berlin Heidelberg, 2013. http://dx.doi.org/10.1007/978-3-642-23499-6_200182.

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Santos-Sacchi, Joseph, Dhasakumar Navaratnam, Rob Raphael, and Dominik Oliver. "Prestin: Molecular Mechanisms Underlying Outer Hair Cell Electromotility." In Understanding the Cochlea, 113–45. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-52073-5_5.

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Steele, Charles R. "Elastic Behavior of the Outer Hair Cell Wall." In Lecture Notes in Biomathematics, 76–83. New York, NY: Springer New York, 1990. http://dx.doi.org/10.1007/978-1-4757-4341-8_10.

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Brownell, William E. "Outer Hair Cell Motility and Cochlear Frequency Selectivity." In Auditory Frequency Selectivity, 109–18. Boston, MA: Springer US, 1986. http://dx.doi.org/10.1007/978-1-4613-2247-4_13.

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Hackney, Carole M., David N. Furness, and Peter S. Steyger. "Structural Abnormalities in Inner Hair Cells Following Kanamycin-Induced Outer Hair Cell Loss." In Lecture Notes in Biomathematics, 10–17. New York, NY: Springer New York, 1990. http://dx.doi.org/10.1007/978-1-4757-4341-8_2.

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Brownell, William E., and Bechara Kachar. "Outer Hair Cell Motility: A Possible Electro-Kinetic Mechanism." In Lecture Notes in Biomathematics, 369–76. Berlin, Heidelberg: Springer Berlin Heidelberg, 1986. http://dx.doi.org/10.1007/978-3-642-50038-1_45.

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Santos-Sacchi, J. "Fast Outer Hair Cell Motility: How Fast is Fast?" In Lecture Notes in Biomathematics, 69–75. New York, NY: Springer New York, 1990. http://dx.doi.org/10.1007/978-1-4757-4341-8_9.

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Snyder, Kenneth V., Frederick Sachs, and William E. Brownell. "The Outer Hair Cell: A Mechanoelectrical and Electromechanical Sensor/Actuator." In Sensors and Sensing in Biology and Engineering, 71–95. Vienna: Springer Vienna, 2003. http://dx.doi.org/10.1007/978-3-7091-6025-1_6.

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Brownell, W. E., and J. S. Oghalai. "Structural Basis of Outer Hair Cell Motility or Where’s the Motor?" In Cell and Molecular Biology of the Ear, 69–83. Boston, MA: Springer US, 2000. http://dx.doi.org/10.1007/978-1-4615-4223-0_5.

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Conference papers on the topic "Outer hair cell"

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Ramamoorthy, Sripriya, Alfred L. Nuttall, Christopher A. Shera, and Elizabeth S. Olson. "Outer Hair Cell Electromotility in vivo." In WHAT FIRE IS IN MINE EARS: PROGRESS IN AUDITORY BIOMECHANICS: Proceedings of the 11th International Mechanics of Hearing Workshop. AIP, 2011. http://dx.doi.org/10.1063/1.3658082.

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IWASA, K. H., and M. ADACHI. "MEMBRANE MOTOR OF THE OUTER HAIR CELL." In Proceedings of the International Symposium. WORLD SCIENTIFIC, 2000. http://dx.doi.org/10.1142/9789812793980_0039.

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ZHANG, M., G. KALINEC, F. KALINEC, D. D. BILLADEAU, and R. URRUTIA. "ROCK ‘N’ RHO IN OUTER HAIR CELL MOTILITY." In Proceedings of the International Symposium. WORLD SCIENTIFIC, 2003. http://dx.doi.org/10.1142/9789812704931_0016.

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CLIFFORD, S., W. E. BROWNELL, and R. D. RABBITT. "ELECTRO-MECHANICAL WAVES IN ISOLATED OUTER HAIR CELL." In Proceedings of the Ninth International Symposium. WORLD SCIENTIFIC, 2006. http://dx.doi.org/10.1142/9789812773456_0026.

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ALLEN, JONT B., and P. F. FAHEY. "OUTER HAIR CELL MECHANICS REFORMULATED WITH ACOUSTIC VARIABLES." In Proceedings of the Ninth International Symposium. WORLD SCIENTIFIC, 2006. http://dx.doi.org/10.1142/9789812773456_0032.

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SPECTOR, A. A., M. AMEEN, P. G. CHARALAMBIDES, and A. S. POPEL. "COMPUTATIONAL MODELING OF THE OUTER HAIR CELL CYTOSKELETON." In Proceedings of the International Symposium. WORLD SCIENTIFIC, 2000. http://dx.doi.org/10.1142/9789812793980_0044.

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Fleischer, Mario, Csaba Harasztosi, Manuela Nowotny, Thomas Zahnert, Anthony W. Gummer, Christopher A. Shera, and Elizabeth S. Olson. "Continuum Mechanical Model of the Outer Hair Cell." In WHAT FIRE IS IN MINE EARS: PROGRESS IN AUDITORY BIOMECHANICS: Proceedings of the 11th International Mechanics of Hearing Workshop. AIP, 2011. http://dx.doi.org/10.1063/1.3658078.

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RAJAGOPALAN, L., J. SFONDOURIS, J. S. OGHALAI, F. A. PEREIRA, and W. E. BROWNELL. "MEMBRANE COMPOSITION TUNES THE OUTER HAIR CELL MOTOR." In Proceedings of the 10th International Workshop on the Mechanics of Hearing. WORLD SCIENTIFIC, 2009. http://dx.doi.org/10.1142/9789812833785_0063.

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Tamaddoni, Nima, and Andy Sarles. "Fabrication and Characterization of a Membrane Based Hair Cell Sensor That Features Soft Hydrogel Materials." In ASME 2012 Conference on Smart Materials, Adaptive Structures and Intelligent Systems. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/smasis2012-8067.

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One of the most common sensory structures in nature is the hair cell. Examples of hair cells include the inner and outer hair cells in the inner ears of vertebrates, external sensory hairs on the legs of spiders, and neuromasts found along the lateral lines of fish. Recent work by Sarles and Leo demonstrated that self-assembly methods could be used to construct a membrane-based hair cell that responds to a physical disturbance of the hair. An artificial cell membrane (or lipid bilayer) formed at the interface of two lipid-encased hydrogel volumes, serves as the transduction element in the device. In this study, a revised sensor embodiment is presented in which the hair is fixed at its base by the encapsulating polymeric substrate. In addition, a highly elastic, photo-polymerizable aqueous gel (PEGDA, 6000g/mole) is used to further increase the resiliency of the hair and to provide a compliant cushion for the bilayer. These changes yield a considerably more durable hair cell sensor. We perform a series of experimental tests to characterize the transduction element (i.e. the bilayer) and the sensing current produced by free vibration of the hair, and we study the directional sensitivity of this hair cell embodiment by perturbing the hair in three directions. These tests demonstrate that the magnitude of the sensing current (30–300pA) is significantly affected by direction of perturbation, where the largest signals result from motion of the hair in a direction perpendicular to the plane of the bilayer.
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Chen, Ben-qiang, and Zhi-dong Zhou. "Simulation of Outer Hair Cell Electromotility due to Flexoelectricity." In 2019 13th Symposium on Piezoelectrcity, Acoustic Waves and Device Applications (SPAWDA). IEEE, 2019. http://dx.doi.org/10.1109/spawda.2019.8681789.

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Reports on the topic "Outer hair cell"

1

Zuo, Jian. Therapeutics for Regeneration of Fully Functional Auditory Outer Hair Cells. Fort Belvoir, VA: Defense Technical Information Center, September 2012. http://dx.doi.org/10.21236/ada569196.

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