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Showing 1 to 14 of 14 for “"utricle"”.
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Hair Bundle Stiffness in the Turtle Utricle: Structural and Regional Variations
… same endorgan. Bundle morphology in the turtle utricle, like other species, demonstrates highly organized regional variations. These structural differences in bundles impact their mechanical behavior and the process of mechanotransduction. To further understanding of the mechanical behavior of …
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Expression Analysis of the Regenerating Utricle Sensory Epithelia : From Macroarrays to Parsing Pathways
… initial study, the sensory epithelium from the utricle was compared to that of the cochlea. The purpose of this study was to identify gene expression differences between these two organs. The sensory epithelium from each organ is made up of hair cells and supporting cells. These hair cells are …
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Experimental Measurements of Vestibular Hair Bundle Stiffness in the Red Ear Slider Turtle Utricle
… the semicircular canals, the saccule, and the utricle. Within each of the vestibular organs, sensory receptors in the form of hair cells detect motion and send a message to the brain for interpretation. Hair cells found in different parts of the inner ear are structurally different and are …
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A Computational Study into the Effect of Structure and Orientation of the Red Ear Slider Turtle Utricle on Hair Bundle Stimulus
… of structure, position and orientation of the utricle of a red ear slider turtle on the stimulation of hair bundles in the OM is investigated here. Using confocal images, a finite element model of the utricle OM is constructed considering its full 3D geometry and varying OM layer thickness. How …
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Experimental Measurement of the Utricle's Dynamic Response and the Mechanoelectrical Characterization of a Micron-Sized DIB
… vestibular system are otolith organs, both the utricle and saccule. The primary function of these organs is to transduce linear head accelerations and static head tilts into afferent signals that are sent to the central nervous system for the utilization of image fixation, muscle posture …
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Genomic Approaches for Pathway Identification in Regenerating Sensory Epithelia of the Inner Ear
… sensory epithelia: SE) in avian cochlea and utricle on a custom transcription factor microarray following damage by laser and chemical ablation and identified genes from known signaling cascades differentially expressed during SE regeneration. In the second study, we selected 27 of these …
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Vestibular Evoked Myogenic Potentials and Postural Control in Adults with Age-Related Hearing Loss
… generated by auditory stimulation of the utricle and saccule measured through a reduction in muscle potentials. Similar to ARHL, age-related changes to the vestibular sensory and supporting structures with specific degeneration of the saccule, utricle, otoconia, primary vestibular …
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The Implementation of a Photoelectronic Motion Transducer for Measuring the Sub-Micrometer Displacements of Vestibular Bundles
… focused on the hair cells located within the utricle, which senses linear accelerations of the head. Within the utricle, we examined two types of hair cells: non-striolar (medial type II) and striolar. Tests on twelve medial type II cells found bundles ranging in stiffness from 0.26 to 2.62 x …
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Analysis of Vestibular Hair Cell Bundle Mechanics Using Finite Element Modeling
… vestibular system of vertebrates consists of the utricle, saccule, and the semicircular canals. Head movement causes deformation of hair cell bundles in these organs, which translate this mechanical stimulus into an electrical response sent to the nervous system. This study consisted of two …
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Mechanical modeling of vestibular hair cell bundles
… posterior semicircular canal and one from the utricle. I present estimations of stiffness, tip link tensions, and nonlinear response. Finally, I investigate a single cilium forced by a fluid flow. The problem is solved by finite difference technique. Three different initial conditions are …
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The Effects of Growth Hormone in the Inner Ear of Zebrafish (<i>Danio rerio</i>) during Hair Cell Regeneration
… all three inner ear end organs (saccule, lagena, utricle), suggesting GH may suppress hair cell death induced by acoustic trauma. Higher levels of cell proliferation were also observed in the ears of GH-injected fish, indicating that GH is capable of activating cell mitosis in the zebrafish …
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A human analog for benchmarking vestibular tests in a roto-tilt chair
… linear acceleration sensors, the saccule and utricle, the development of models of vestibular deficiencies, and the creation of dummies to be used for educational purposes.
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Inner ear morphology in elasmobranchs: implications for auditory capacity and ecology
… in all four hearing end organs (saccule, lagena, utricle, and macula neglecta). Further, there is variation in hair cell organisation between shark species with different feeding strategies, primarily attributed to vertically oriented hair cells. Lastly, using magnetic resonance imaging (MRI) to …
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Reimagining the Inner Ear: A Morphometric Modeling Approach for Establishing Shape Change in the Evolution of the Human Otolith System
… angular acceleration) and otolith organs (utricle and saccule; detecting linear acceleration, vibration, and head tilt relative to gravity). The vestibular organs are often considered a single system, with most research focusing on the semicircular canals. The otolith organs, by comparison, …