Abstract:
:Guinea pigs were exposed to pure tones of 10 kHz at intensities between 98 and 115 dB SPL for 5-30 min, to produce varying degrees of acoustic trauma. Changes in auditory thresholds were measured electrophysiologically, and the animals were immediately fixed for scanning electron microscopy. Correlation between morphological changes to the hair bundle and losses in threshold, showed that with the smallest degrees of trauma (98 dB SPL for 15 min, mean maximum threshold loss of 22 dB), damage was confined to a small stretch of inner hair cells (IHC), with only subtle changes to the stereocilia of the outer hair cells (OHC). At exposure intensities greater than 102 dB SPL (duration: 15 min) the IHC stereocilia in the centre of the lesion were always substantially disarrayed. Substantial damage to the OHC bundles was seen only with exposures above 110 dB SPL (duration: > or = 5 min), producing threshold losses of 50 dB or more. Tip links were lost only where the stereocilia were disarrayed. It is concluded that the tip links are not the most vulnerable components of the cochlear hair cell, but that relatively low levels of acoustic stimulation can cause significant damage to the stereociliary bundle of the IHCs.
journal_name
Hear Resjournal_title
Hearing researchauthors
Clark JA,Pickles JOdoi
10.1016/s0378-5955(96)00092-5subject
Has Abstractpub_date
1996-09-15 00:00:00pages
119-28issue
1-2eissn
0378-5955issn
1878-5891pii
S0378-5955(96)00092-5journal_volume
99pub_type
杂志文章相关文献
HEARING RESEARCH文献大全abstract::The olivocochlear bundle was sectioned at the floor of the fourth ventricle in a series of cats. From three to thirty weeks post-operatively, recordings were made from single auditory-nerve fibers. Tuning curves, spontaneous discharge rates, and rate-level functions for tones at the characteristic frequency were measu...
journal_title:Hearing research
pub_type: 杂志文章
doi:10.1016/0378-5955(90)90105-x
更新日期:1990-11-01 00:00:00
abstract::In order to determine the place-frequency map of the rat cochlea, iontophoretic HRP-injections were made into the cochlear nucleus at electrophysiologically characterized positions. Distribution of retrograde HRP transport in cochlear spiral ganglion cells was analysed by means of a three dimensional reconstruction of...
journal_title:Hearing research
pub_type: 杂志文章
doi:10.1016/0378-5955(91)90041-7
更新日期:1991-02-01 00:00:00
abstract::The ultrastructure of the sensory epithelia in the auditory regions of the ear, the sacculus and lagena, were investigated in the blue gourami, Trichogaster trichopterus, using transmission and scanning electron microscopy. The sensory epithelium consists of sensory hair cells surrounded by supporting cells, both of w...
journal_title:Hearing research
pub_type: 杂志文章
doi:10.1016/0378-5955(81)90049-6
更新日期:1981-11-01 00:00:00
abstract::Mammalian aquaporins constitute a family of so far 10 related water channel proteins which mediate osmotically driven water fluxes across the plasma membrane. Because regulation of the ionic composition and osmolality of inner ear fluids is of great functional significance, we investigated the expression patterns of a...
journal_title:Hearing research
pub_type: 杂志文章
doi:10.1016/s0378-5955(99)00036-2
更新日期:1999-06-01 00:00:00
abstract::Uncoupling proteins (UCPs) are a proton transporter family located in the mitochondrial inner membrane. The molecular expression and activity of UCPs in brown adipose tissue and skeletal muscle are regulated by factors as diverse as chronic overeating and cold exposure, suggesting roles in energy expenditure and heat ...
journal_title:Hearing research
pub_type: 杂志文章
doi:10.1016/j.heares.2004.02.002
更新日期:2004-10-01 00:00:00
abstract::This paper describes the development of a protocol that can be used to detect collagen II in the healthy adult basilar membrane (BM) at the electron microscopic level. This protocol required aggressive epitope exposure techniques to break the crosslinks that bind the collagen molecules tightly into fibrils and to remo...
journal_title:Hearing research
pub_type: 杂志文章
doi:10.1016/s0378-5955(02)00313-1
更新日期:2002-04-01 00:00:00
abstract::Laser Doppler vibrometry was used to measure the sound-induced tympanic membrane (TM) velocity, assessed near the umbo, in 56 normal hearing human subjects at nine sound frequencies. A second series of measurements was made in 47 subjects with sensorineural hearing loss (SNHL). Each set of measurements has features in...
journal_title:Hearing research
pub_type: 杂志文章
doi:10.1016/s0378-5955(03)00332-0
更新日期:2004-01-01 00:00:00
abstract::Several studies have shown that treatment with various neurotrophins protects spiral ganglion cells (SGCs) from degeneration in hair-cell deprived cochleas. In most of these studies the neurotrophins are delivered by means of intracochlear delivery methods. Recently, other application methods that might be more suited...
journal_title:Hearing research
pub_type: 杂志文章
doi:10.1016/j.heares.2010.10.003
更新日期:2011-02-01 00:00:00
abstract::We show that trkB and trkC mRNAs, encoding the high-affinity receptor tyrosine kinases for brain-derived neurotrophic factor (BDNF) and neurotrophin-3 (NT-3), respectively, as well as low-affinity nerve growth factor receptor (p75LNGFR) mRNA are expressed in the cochleovestibular ganglion (CVG) before and during inner...
journal_title:Hearing research
pub_type: 杂志文章
doi:10.1016/0378-5955(94)90064-7
更新日期:1994-05-01 00:00:00
abstract::The ototoxic effects of salicylates, reversible hearing loss and tinnitus, are well documented. However, the pharmacological mechanisms underlying these changes in cochlear function are not well understood. The studies reported here were an investigation of the site and mechanism of salicylate ototoxicity through an e...
journal_title:Hearing research
pub_type: 杂志文章
doi:10.1016/0378-5955(90)90144-e
更新日期:1990-06-01 00:00:00
abstract::Gamma-aminobutyric acid (GABA)-like immunoreactivity in the chick basilar papilla and lagenar macula was studied by using anti-serum against GABA coupled with glutaraldehyde to bovine serum albumin. GABA-like immunoreactivity was localized selectively in the cytoplasm of both tall and short hair cells in the basilar p...
journal_title:Hearing research
pub_type: 杂志文章
doi:10.1016/0378-5955(87)90178-x
更新日期:1987-01-01 00:00:00
abstract::Stiffness of hair bundles on cochlear hair cells was measured in turns 2, 3 and 4 of isolated preparations of the guinea-pig organ of Corti maintained in tissue culture medium. Defined as the force required to produce a linear 1.0 micron deflection of the hair-bundle tip, stiffness is greater for deflection in the exc...
journal_title:Hearing research
pub_type: 杂志文章
doi:10.1016/0378-5955(84)90221-1
更新日期:1984-07-01 00:00:00
abstract::Cochlear implant insertion should be as least traumatic as possible in order to reduce trauma to the cochlear sensory structures. The force applied to the cochlea during array insertion should be controlled to limit insertion-related damage. The relationship between insertion force and histological traumatism remains ...
journal_title:Hearing research
pub_type: 杂志文章
doi:10.1016/j.heares.2016.11.002
更新日期:2017-02-01 00:00:00
abstract::The primary goal of this study was to characterize the variability in auditory-nerve temporal response patterns obtained with the electrically evoked compound action potential (ECAP) within and across a relatively large group of cochlear-implant recipients. ECAPs were recorded in response to each of 21 pulses in a pul...
journal_title:Hearing research
pub_type: 杂志文章
doi:10.1016/j.heares.2012.01.010
更新日期:2012-03-01 00:00:00
abstract::Two-tone stimuli have traditionally been used to reveal regions of inhibition in auditory spectral receptive fields, particularly for neurons with low spontaneous rates. These techniques reveal how different frequencies excite or suppress the response to an excitatory frequency of a cell, but have often been assessed ...
journal_title:Hearing research
pub_type: 杂志文章
doi:10.1016/j.heares.2005.07.005
更新日期:2005-12-01 00:00:00
abstract::The frequency-modulation following response (FMFR) is a steady-state evoked response which may be a neural correlate of frequency discrimination. Aged subjects with normal hearing have abnormal frequency discrimination for low carrier frequencies and thus it might be predicted that aged individuals would have reduced ...
journal_title:Hearing research
pub_type: 杂志文章
doi:10.1016/s0378-5955(01)00398-7
更新日期:2002-03-01 00:00:00
abstract::The influence of temporal cues on sequential stream segregation was investigated using five elderly hearing-impaired listeners. In experiment 1, an alternating pattern of A and B tones was used. Each tone was a harmonic complex with a 100-Hz fundamental, with one of three passbands (1250-2500, 1768-3636, or 2500-5000 ...
journal_title:Hearing research
pub_type: 杂志文章
doi:10.1016/j.heares.2004.02.003
更新日期:2004-06-01 00:00:00
abstract::A model for cochlear mechanics is proposed to take account of its two systems, one passive and one active. The classical passive system stimulates the inner hair cells directly at levels above about 40 dB SL. At intensities below about 60 dB an active process, the 'cochlear amplifier' (CA), somehow provides additional...
journal_title:Hearing research
pub_type: 杂志文章
doi:10.1016/0378-5955(83)90136-3
更新日期:1983-01-01 00:00:00
abstract::The goal of the current study was to characterize the normative features of wideband acoustic immittance in children for describing the functional maturation of the middle ear in 5 to 12-year-old children. Absorbance and group delay were measured in adults and three groups of children, 5-6, 7-9 and 10-12-year-olds, in...
journal_title:Hearing research
pub_type: 杂志文章
doi:10.1016/j.heares.2016.10.029
更新日期:2017-02-01 00:00:00
abstract::Exposure of the vestibulo-cochlear anastomosis in the cat allows single-unit recording of afferent fibers originating from inner hair cells and olivocochlear efferent fibers to the outer hair cells. Comparison of data obtained from individual animals show similarities in absolute threshold and dynamic range between th...
journal_title:Hearing research
pub_type: 杂志文章
doi:10.1016/0378-5955(88)90105-0
更新日期:1988-07-15 00:00:00
abstract::Perception of objects in the scene around us is effortless and intuitive, yet entails profound computational challenges. Progress has been made in understanding some mechanisms by which the brain encodes the boundaries and surfaces of visual objects. However, in the auditory domain, these mechanisms are poorly underst...
journal_title:Hearing research
pub_type: 杂志文章
doi:10.1016/j.heares.2013.06.009
更新日期:2013-10-01 00:00:00
abstract::In this paper we reconsider the designation of fishes as being either "hearing specialists" or "hearing generalists," and recommend dropping the terms. We argue that this classification is only vaguely and variously defined in the literature, and that these terms often have unclear and different meaning to different i...
journal_title:Hearing research
pub_type: 杂志文章
doi:10.1016/j.heares.2009.12.023
更新日期:2011-03-01 00:00:00
abstract::A linear (frequency-domain) model of the cat cochlea (implemented in both 1- and 2-dimensional versions) has been developed which uses outer hair cell (OHC) forces in a geometry which includes the longitudinal (base-to-apex) tilt of the outer hair cells (OHCs). When positive (contractile) real OHC force-constants are ...
journal_title:Hearing research
pub_type: 杂志文章
doi:10.1016/0378-5955(95)00064-b
更新日期:1995-06-01 00:00:00
abstract::Hypoxia/ischemia is a major pathogenetic factor in the development of hearing loss. An important transcription factor involved in the signaling and adaptation to hypoxia/ischemia is the hypoxia-inducible factor-1 (HIF-1). To study HIF-1 expression we used an in vitro hypoxia model of explant and dissociated cultures o...
journal_title:Hearing research
pub_type: 杂志文章
doi:10.1016/s0378-5955(03)00222-3
更新日期:2003-09-01 00:00:00
abstract::Pairs of single units were recorded simultaneously from the same microelectrode in the medial geniculate body (MGB) of nitrous oxide anaesthetized cats. Crosscorrelation histograms of each spike train pairs were computed and distributed in five main classes, interpreted in terms of functional interaction between neigh...
journal_title:Hearing research
pub_type: 杂志文章
doi:10.1016/0378-5955(87)90093-1
更新日期:1987-01-01 00:00:00
abstract::Although the neural mechanisms underlying pitch perception are not yet fully understood, there is general agreement that place and temporal representations of pitch are both used by the auditory system. This paper describes a neural network model of pitch perception that integrates both codes of pitch and explores the...
journal_title:Hearing research
pub_type: 杂志文章
doi:10.1016/j.heares.2016.11.005
更新日期:2017-02-01 00:00:00
abstract::Units in the auditory cortex of cats respond to a large variety of stimuli: pure tones, AM- and FM-modulated signals, clicks, wideband noise, natural sounds, and more. However, no single family of sounds was found to be optimal (in the sense that oriented lines are optimal in the visual cortex). The search for optimal...
journal_title:Hearing research
pub_type: 杂志文章
doi:10.1016/0378-5955(94)90222-4
更新日期:1994-01-01 00:00:00
abstract::This study explored the effects on speech intelligibility of across-formant differences in fundamental frequency (ΔF0) and F0 contour. Sentence-length speech analogues were presented dichotically (left = F1+F3; right = F2), either alone or-because competition usually reveals grouping cues most clearly-accompanied in t...
journal_title:Hearing research
pub_type: 杂志文章
doi:10.1016/j.heares.2016.10.026
更新日期:2017-02-01 00:00:00
abstract::Effects of stimulus level on discrimination of one stimulation site from another were examined in 15 human subjects with Nucleus-22 cochlear implant systems. Bipolar stimulation was used in all cases with electrodes in the bipolar pair separated by 1.5 mm (center to center). Subjects were first tested at a medium loud...
journal_title:Hearing research
pub_type: 杂志文章
doi:10.1016/s0378-5955(99)00079-9
更新日期:1999-08-01 00:00:00
abstract::In our companion paper (Le Calvez et al., 1998), the levels of distortion product otoacoustic emissions (DPOAE) were collected in the ears of CD1 mice with progressive degeneration of cochlear outer hair cells (OHC). Their comparison to standard functional measurements such as auditory-evoked brainstem responses (ABR)...
journal_title:Hearing research
pub_type: 杂志文章
doi:10.1016/s0378-5955(98)00051-3
更新日期:1998-06-01 00:00:00