Numerical simulation on the dynamic behavior of the …
· Numerical simulation on the dynamic behavior of the basilar membrane in the spiral cochlea., Wenjuan Yao, Yiqiang Chen, Jianwei Ma, Chaosun Gan, Dejiang Wang Table 2. The properties of lymph in cochlea. Boundary conditions Uniform pressure of 80 dB SPL (0
Basilar Membrane Vibration in the Gerbil Hemicochlea
Propagation of mechanical disturbances (traveling waves) along the basilar membrane in the cochlea has been studied experimentally for about half a century. As the traveling wave proceeds along the cochlea, from base toward apex, tones of different frequencies produce waves that rise in amplitude at different rates and attain their maxima at different locations before extinguishing.
The Human Ear
Sound waves cause the basilar membrane to move relative to the tectorial membrane. The cilia of the hair cells bend when contact is made to the tectorial membrane and the hair cell discharges. The human cochlea contains approximately 3500 inner hair cells (those lying on the inside of the cochlear coil) and 12,000 outer hair cells (those lying on the outside of the cochlear coil).
Basilar Membrane Motion
· PDF 檔案BASILAR MEMBRANE MOTION 621 Figure 2 A more detailea drawing of the human ear with the interior of the cochlea exposed. beyond which the phase difference stayed at an ap
Although the cochlea itself narrows towards the apical end, the basilar membrane has the opposite geometry—becoming wider and more flexible towards the apical end. Primarily because of these physical characteristics, the apical end of the basilar membrane maximally vibrates when exposed to low-frequency sounds, while the narrower, stiffer basal end maximally vibrates when exposed to high
The inner ear consists of the cochlea and several non-auditory structures. The cochlea has three fluid-filled sections (i.e. the scala media, scala tympani and scala vestibuli), and supports a fluid wave driven by pressure across the basilar membrane separating two of the sections. separating two of the sections.
System overview ·
Difference Between Basilar and Tectorial Membrane
The basilar membrane is widest and least stiff at the apex of the cochlea while it is narrowest and stiffest at the base. Different parts of the basilar membrane vibrate in response to sound. And, this is the key to the understanding of cochlear function. What is a
Finite element simulation of cochlear traveling wave …
· Besides the normal hearing pathway known as air conduction (AC), sound can also transmit to the cochlea through the skull, known as bone conduction (BC). During BC stimulation, the cochlear walls demonstrate rigid body motion (RBM) and compressional motion (CPM), both inducing the basilar membrane traveling wave (TW). Despite numerous measuring and modeling efforts for the TW …
Postnatal structural development of mammalian Basilar …
· The basilar membrane (BM) of the mammalian cochlea constitutes a spiraling acellular ribbon that is intimately attached to the organ of Corti. Its … Read more on nature.com Aging Pregnancy Biology Collagen Postpartum
Physic 11 10.1.pdf
The cochlea, a snail-shaped organ approximately 3 cm long, is divided into two sec-tions by a partition called the basilar membrane (Figure 3). The vibrations at the oval window cause pressure waves in the fluid that fills the cochlea. Waves travel down one
The basilar membrane is widest (0.42–0.65 mm) and least stiff at the apex of the cochlea, and narrowest (0.08–0.16 mm) and most stiff at the base. High-frequency sounds localize near the base of the cochlea (near the round and oval windows), while low
Emilin 2 promotes the mechanical gradient of the …
The basilar membrane (BM), an elastic, ribbon-like structure in the mammalian cochlea, plays a central role in mediating the mechanical decomposition of sound into individual frequency components, a key feature of auditory function.
Vibration of the Basilar Membrane and Fluid Pressure …
However, since the cochlea represents a closed hydraulic system with a complex geometry, the motion of the basilar membrane as well as the fluid pressure can hardly be measured. Therefore, a numerical model of the uncoiled cochlea is developed representing the fundamental physical effects occurring in the cochlea.
basilar membrane : definition of basilar membrane and …
Basilar Membrane (n.) 1. A basement membrane in the cochlea that supports the hair cells of the ORGAN OF CORTI, consisting keratin-like fibrils.It stretches from the SPIRAL LAMINA to the basilar crest. The movement of fluid in the cochlea, induced by sound
Distribution of Type IV Collagen in the Cochlea in …
For example, the BM may fail to provide adequate adhesion between cells of the organ of Corti and the basilar membrane so that basilar membrane motion is not properly tuned by the outer hair cells. Such a hypothesis is consistent with clinical observations that speech discrimination usually remains excellent in Alport syndrome and the SNHL generally does not exceed 60 to 70 dB. 17 , 18