(n.) The watery fluid contained in the membranous labyrinth of the internal ear.
Example Sentences:
(1) The results show that endolymph is extremely inhomogenous with respect to calcium potentials.
(2) Compared with the endolymph, the perilymph was found to contain a higher concentration of glucose and total protein.
(3) Under such conditions the basal cells may line the surface facing the endolymph, although this occurs very rarely.
(4) Res., 39, 279-286] the pressure gradient of the endolymph between the cochlea and ES was calculated to be 71.5 mmHg at 38 degrees C. The contribution of the osmotic and hydrostatic pressure gradients of the endolymph to the longitudinal flow is discussed.
(5) Zonulae occludents of the marginal cells, which form a barrier towards the potassium-rich endolymph of the cochlear duct, were demonstrated to be of the "intermediate to tight" type (Claude and Goodenough, 1973).
(6) Ototoxic effects primarily affecting the source for the production of endolymph, i.e.
(7) On the basis of theoretical considerations and experimental studies, it can be shown that Menière's attacks result from rupture of the membranous labyrinth with diffusion of potassium into the perilymph and sodium into the endolymph.
(8) Estimated differential pressure conditions resulting in the endolymph canal support this hypothesis and are in agreement with the observed response intensity.
(9) The results suggest the possibility that aldosterone may play a role in the endolymph absorption of the endolymphatic sac.
(10) These and other data suggest that a dominant feature of endolymph chemistry may be HCO3- formation linked in some fashion with K+ transport, through rates catalyzed by these two enzymes.
(11) Perilymph is considered to be the precursor of endolymph.
(12) The endocochlear potential and Cl- activities in the endolymph and perilymph of guinea pigs were simultaneously measured with a pair of double-barreled Cl--sensitive liquid-membrane electrodes.
(13) After 1 and 2 h the endolymph was removed from the second turn and the ionic concentration of these samples was measured by flamephotometry.
(14) The hydrops in Ménière cases is brought about by a relative insufficiency in endolymphatic draining routes and the hydrops presents itself only at peak endolymph production periods.
(15) No differences in osmotic pressure were demonstrated between endolymph, perilymph and serum.
(16) It is suggested that the surface coat and homogeneous substance may play an important part in the endolymph regulatory mechanism in the endolymphatic sac.
(17) During two recent canal occlusions, abundant "free-floating particles" were identified within the posterior canal endolymph.
(18) This finding suggests that the endolymphatic sac may be capable both of absorbing and of secreting endolymph.
(19) The endolymph flow rate may be different in turn I as indicated by measurements of compound action potential (CAP) changes.
(20) This may serve as a micromechanical pressure-volume-regulating device for monitoring endolymph fluid homeostasis.
Perilymph
Definition:
(n.) The fluid which surrounds the membranous labyrinth of the internal ear, and separates it from the walls of the chambers in which the labyrinth lies.
Example Sentences:
(1) Compared with the endolymph, the perilymph was found to contain a higher concentration of glucose and total protein.
(2) The purity of each sample was assured by measurement of the protein concentration of each sample and comparison of this parameter to known normal values for perilymph, serum, and CSF.
(3) 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.
(4) After injection of the glucose-glucose oxidase mixture into the cerebellomedullary cistern, the deprivation of the oxygen tension in CSF and perilymph was measured in different time courses.
(5) This tendency was much more intensified in kidney and perilymph of the pretreated animals.
(6) Results indicate that the presence of K ions in the bathing fluids is essential for maintaining the receptor function in crista ampullaris, although very low concentrations of this ion in the perilymph are sufficient to preserve the receptor responsiveness to mechanical stimuli.
(7) Tissue characteristics of this laser energy should permit the vaporization of the stapes footplate or oval window soft tissue without thermal effect to the vestibule and without passing through the perilymph to damage the delicate structures of the inner ear.
(8) On the basis of theoretical considerations and experimental studies, it can be shown that Menière's attacks result from rupture of the membranous labyrinth with diffusion of potassium into the perilymph and sodium into the endolymph.
(9) However, oval window problems such as footplate refixation, perilymph fistula, otosclerotic regrowth, and lateralized oval window membrane in 60% of cases often complicated prosthesis displacement.
(10) Perilymph is considered to be the precursor of endolymph.
(11) These concomitant lesions comprise the perilymph fistula syndrome (PLFS) with a unique profile of neurological, perceptual, and cognitive deficits resembling a post-concussion injury.
(12) The endocochlear potential and Cl- activities in the endolymph and perilymph of guinea pigs were simultaneously measured with a pair of double-barreled Cl--sensitive liquid-membrane electrodes.
(13) No differences in osmotic pressure were demonstrated between endolymph, perilymph and serum.
(14) The only way of preventing the recurrent bouts of bacterial meningitis in cases of large perilymph fistulas is surgical repair.
(15) While the round window niche was irrigated with artificial perilymph containing 1 mM TMPA, the TMPA concentration in ST of the basal turn rose rapidly so as to reach 20-50% of the irrigating medium concentration in one hour.
(16) From each anesthetized guinea pig, five to six perilymph samples were collected from one ear, and one sample was collected from the other ear at 6 h. The concentrations of amikacin in perilymph were dose proportional and increased slowly during the 6-h infusion.
(17) The problem of the perilymph origin--influx of cerebrospinal fluid (CSF) versus ultrafiltration within the cochlea--cannot be solved by mere qualitative proofs of tracer passage through the cochlear aqueduct.
(18) Following perilymph aspiration through the perforated round window membrane, mild but significant elevations of CAP thresholds at tested frequencies were found.
(19) The conversion of LTC4 into LTD4 and LTE4 was lower in perilymph as compared to the cerebrospinal fluid, suggesting a rate limiting function of the cochlear aqueduct that can be defined as a cerebrospinal fluid-labyrinth barrier.
(20) Secondary immune response animals, those which were systemically immunized with KLH prior to inner ear challenge, showed significant serum and perilymph anti-KLH titers, and normal CM and AP thresholds at the time of inner ear challenge.