Auditory brainstem responses (ABR) were obtained from a sheep fetus in utero and from a nonpregnant ewe before and after a noise exposure generated by 10 105-mm howitzerr impulses (160-166 dB peak pressure).
Fetal ABR thresholds shirted by less than 15 dB, whereas the adult thresholds shifted more than 50 dB.
Comparison of exposed and nonexposed fetal cytocochleograms revealed minimal sensory cell loss in two age-matched animals.
Although fetal ABR threshold shirts were noted in this study, the magnitude of shirt was modest when compared to the significant elevation of the adult ABR thresholds.
Mots-clés Pascal : ORL pathologie, Système nerveux pathologie, Foetus, Animal, Adulte, Homme, Femelle, Etude cas, Etude comparative, Electrodiagnostic, Etats Unis, Amérique du Nord, Amérique, Mouton, Artiodactyla, Ungulata, Mammalia, Vertebrata, Tronc cérébral, Impulsion, Bruit, Audition, Bioélectrochimie, Cochléographie, Seuil
Mots-clés Pascal anglais : ENT disease, Nervous system diseases, Fetus, Animal, Adult, Human, Female, Case study, Comparative study, Electrodiagnosis, United States, North America, America, Sheep, Artiodactyla, Ungulata, Mammalia, Vertebrata, Brain stem, Impulse, Noise, Hearing, Bioelectrochemistry, Cochleography, Threshold
Notice produite par :
Inist-CNRS - Institut de l'Information Scientifique et Technique
Cote : 95-0176372
Code Inist : 002B24G. Création : 09/06/1995.