Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 15 of 15 for “"Basilar membrane"”.
-
Auditory-nerve fiber responses to amplitude modulated tones and multi-tonal stimuli
… and the group delays of tone responses on the basilar membrane within the cochlea. Using single and multiple-tone stimuli, we collected data from the firing patterns of single auditory-nerve-fibers (ANFs) from which basilar-membrane tone-response group delays can be calculated for both high and …
-
Frequency Selectivity of Synaptic Exocytosis in Hair Cells of the Bullfrog's Amphibian Papilla
… dependence of the traveling waves on the basilar membrane, the flexible structure that houses hair cells, the auditory receptors. However, in non-mammalian vertebrates, the basilar membrane does not conduct a traveling wave. In some animals, the membrane is absent entirely. Yet auditory …
-
A feedback analysis of outer hair cell dynamics
… 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 …
-
Phase anomalies and plateaus in auditory nerve fiber responses to high-frequency tones
… been found in studies that measure motion of the basilar membrane (BM) at the base of the cochlea in response to high-level sounds above the characteristic frequency (CF). In contrast, such patterns have not been found in responses of auditory-nerve fibers (ANF) from the base of the cochlea, …
-
Auditory brainstem and middle-latency responses with optimized stimuli: experiments and models
… for travel time differences along the basilar membrane. In Ch. 2 it is shown that, due to inclusion of activity from lower-frequency regions, the chirp evokes significantly larger ABR amplitude than the corresponding click. The usefulness of the chirp for retrieving frequency-specific …
-
In-vivo measurement of sound-induced motions in the gerbil cochlea
… laser Doppler velocimeter (LDV). We measured the basilar membrane (BM) in the Mongolian gerbil at a distance of roughly 1.5 mm from the extreme base and found a best frequency (BF) of roughly 35 kHz. We chose the base to gain access through the round window membrane (RWM) to minimize the need for …
-
Supra-Characteristic-Frequency Response in Gerbil Auditory Nerve Frequency Tuning Curves
… vibration of the sensory tissues, including the basilar membrane (BM), inside the cochlea and, in turn, leads to inner hair cell excitation and auditory nerve fiber (ANF) responses. The goal of this study is to better understand the mechanics of inner hair cell excitation which leads to hearing. …
-
The functional role of the mammalian tectorial membrane in the cochlear mechanics
… traveling waves of motion propagate along the basilar membrane (BM) and ultimately stimulate the mechano-sensory receptors. The tectorial membrane (TM) plays a key role in this stimulation process, but its mechanical function remains unclear. Here we show that the TM supports traveling waves …
-
A high accuracy nonlinear model of the human cochlea
… hair cell models using experimental data on the basilar membrane compression curve and the intensity just-noticeable-difference. The result is an efficient multi-rate system which can be easily reconfigured based on the needs of the application. Preliminary tests of the model show that it is …
-
A Study on Steady State Traveling Waves in Strings and Rods
… mechanisms, propulsion of flagella, and the basilar membrane in the ear’s cochlea.
-
Generating Traveling Waves in Finite Media Using Single-Point Excitation via Passive Absorber
… in the cochlea of the inner ear, the Basilar Membrane (BM) and hair cells are responsible for transducing incoming acoustic waves into electrical signals. These acoustic signals are carried as traveling waves by the BM and propagate from the base of the cochlea toward its apex where …
-
Using otoacoustic emissions to evaluate efferent auditory function in humans
… that although efferent-mediated suppression of basilar membrane mechanics is related to the phenomenon, more central mechanisms may be required to modulate the perceptual response. </p>
-
Investigating the suppressive effects of a low-frequency bias-tone on auditory-nerve responses to tail-frequency tones
… Specifically, sound vibrates the cochlear basilar membrane and this motion is transmitted to the OHC mechano-electric transduction function which produces a voltage change in the OHCs. This voltage change, through OHC electromotility, feeds back energy that amplifies basilar-membrane …
-
A theory of speech perception in normal and hearing-impaired ears
… dead regions, which are places along the basilar membrane of the cochlea where the inner hair cells are degenerate. We propose a new method to diagnose dead regions based on comodulation masking release. This project extends our effort to achieve a fundamental insight into the nature of …
-
Low-frequency bias-tone effects on auditory-nerve responses to clicks and tones : investigating multiple outer-hair-cell actions on auditory-nerve firing
… 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 …