(n.) An appendage of the labyrinth of the internal ear, which is elongated and coiled into a spiral in mammals. See Ear.
Example Sentences:
(1) In addition to the aqueduct other associated inner ear anomalies have been identified in 60% of this population including: enlarged vestibule (14); enlarged vestibule and lateral semicircular canal (7); enlarged vestibule and hypoplastic cochlea (4); and hypoplastic cochlea (4).
(2) We tested the hypothesis that furosemide interferes with energy generation in the cochlea, and determined its effect on CO2 formation from glucose and glyceroaldehyde-3-phosphate dehydrogenase (GAPDH) activity by examining biochemical and histochemical changes in the cochlea, the kidney, and the liver.
(3) Although sound pressure levels are high, they are probably reduced before reaching the cochlea of the fetus because of the surrounding amniotic fluid and the fluid in the middle ear.
(4) We use this procedure to assess the excitability of the auditory nerve, the patency of the cochlea and to detect undesirable side effects of electrical stimulation, such as facial nerve activation.
(5) After 2-4 days the cochleas were prepared for morphological analysis by scanning electron microscopy and chemical analysis by X-ray dispersive microanalysis.
(6) Complete atrophy of variable lengths of the terminal basal coil cells was also found in all elderly cochleas.
(7) In a series with sixteen normal adult volunteers, 22 to 45 years in age, 100% of the cochleae, vestibules, and lateral and posterior semicircular canals were clearly demonstrated in T2 weighted images.
(8) In animals receiving passive (unstimulated) implants, morphometric analysis of spiral ganglion cell density showed no significant difference in ganglion cell survival between the implanted cochleas and the contralateral control ears.
(9) Measurements were obtained from fibers innervating hair cells in both the region of the cochlea that contains a tectorial membrane (tectorial fibers) and the region where hair-cell stereocilia are free-standing in scala media (free-standing fibers).
(10) Histologically, no discernible changes in the hair cells or sensory hairs were found with a scanning electron microscope at about 6 hours after 10 krad irradiation, while with a transmission electron microscope, the outer hair cells in the basal coil of the cochlea were found to be mostly destroyed.
(11) A combined morphological and physiological study on the effect of saccus obliteration on the cochlea and the vestibular labyrinth of the rat is presented.
(12) It is suggested that in a programme designed to implant such children at 2 years of age, techniques should be chosen that neither damage the cochlea nor the middle ear sound conducting mechanism.
(13) Blood flow in the cochlea, vestibular apparatus and facial nerve was investigated in the 12 temporal bones of 6 guinea pigs using non-radioactive microspheres.
(14) The total length in mm of each cochlea was also measured (Length).
(15) We have made whole-cell, tight-seal recordings from short (outer) hair cells isolated from the chick's cochlea.
(16) Morphological evidence suggests that the membrane participates in: (a) the release of mechanical energy supplied by the ossicular chain to the labyrinthine fluids; (b) an alternative route for sound energy to enter the cochlea; (c) secretion into and absorption from perilymph; and (d) the defense system of the middle and inner ears.
(17) Human cochleae were fixed in glutaraldehyde, without the use of osmium.
(18) The findings are discussed in relation to changes in nerve conduction speed and hearing loss; a possible correlation between the fiber diameter distribution and the tonotopical arrangement of the cochlea is suggested.
(19) Histological examination of the cochleas of monkeys with permanent hearing losses revealed corresponding damage to the high-frequency region of the organ of Corti.
(20) The endo- and perilymphatic glycocalyx of the cochlear epithelia were investigated ultrastructurally in normal and hydropic cochleas using the electron-dense markers cationized ferritin and colloidal thorium.
Eardrum
Definition:
(n.) The tympanum. See Illust. of Ear.
Example Sentences:
(1) Their use is indicated in large or total defects to restore the natural anatomical conical shape of the eardrum, particularly in congenital atresia.
(2) Primitively, vibrations reached the stapes mainly via the anterior hyoid cornu, but in dicynodonts, therocephalians, and cynodants vibrations passed mainly or exclusively from mandible to quadrate to stapes and the reflected lamina was a component of the eardrum.
(3) An attempt was made to answer the question whether it is justified to set an age limit for performance of eardrum reconstructions in children.
(4) A possible relationship of primary auditory and primary nonauditory blast injury was discussed, and it has been concluded that more severe rupture of the eardrum in the injured by mine explosion can suggest the presence of primary blast injuries.
(5) His back was also injured, and both his eardrums burst, he said.
(6) The nature of the acoustic coupling limits the passive energy absorption and transmission properties of the eardrum.
(7) The hierarchy illuminates some of the limitations of various simplified elements commonly used to model the middle ear and demonstrates the necessity of treating the acoustics and the eardrum as an integrated subsystem.
(8) Large variations of sound pressure along the ear canal and over the surface of the eardrum are found above about 10 kHz.
(9) The acoustical energy reflectance at the eardrum, as calculated from a model of the ear canal when terminated by the middle ear model, agrees reasonably well with experimental data up to about 12 kHz.
(10) The tubal compliance index (TCI), which is the ratio of the tubal resistance between two different air flow rates, was compared among three groups: 36 ears of children with otitis media with effusion (OME), 26 ears of adult OME patients, and 10 otherwise normal ears with traumatic perforations of the eardrum.
(11) A major part of this alteration is due to the interaction of various mechanical and acoustic resonances which are characteristic of the hearing-aid receiver and the sound transmission system linking the receiver with the eardrum.
(12) I hope I don't sound too much of fuddy-fuddy -- actually, I know I do -- but surely the point of an athletics meet is to watch athletics and see people run and throw things -- and not to have your eardrums assaulted by a booming bass beat?
(13) The present study also included gross and histopathological examinations of the eardrum and observation of fibers of the lamina propria of the transplanted tympanic membrane by means of polarizing microscopy and of vascularization by intravascular India ink injection.
(14) In cases of retraction of the eardrum, the otoemissions were present in 2 of 23 ears.
(15) However, based on calculations of anticipated leakage of H2S for a variety of eustachian tube conditions and in the absence of either medical literature or personal reports documenting H2S poisoning due to eardrum perforation, the recommendation for excluding workers with such a condition from working in or around H2S is not supported.
(16) The auditory sensitivity of the rats with cotton-stuffed ears and the pierced eardrums decreased about 10 and 20 dB, respectively.
(17) Twenty-five eardrums of 15 healthy children without past or present history of otological disease were examined using otoscopy; a photograph of each eardrum was obtained.
(18) Perforated eardrums were found in 13.9% of Aboriginal and in 0.3% of European children's ears, and this abnormality was strongly associated with low weight and height status.
(19) Revised acoustic energy reflection coefficients, at the eardrum, are obtained for 20 ears for frequencies between 3 and 13 kHz.
(20) Three children whose eardrums appeared normal upon previous examinations, one with the otomicroscope, apparently developed tympanic membrane cholesteatomas that penetrated the fibrous layer of the pars tensa.