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Brainstem‐evoked responses of guinea pigs exposed to high noise levels in utero
Author(s) -
Cook Reginald O.,
Konishi T.,
Salt A. N.,
Hamm C. W.,
Lebetkin E. H.,
Koo J.
Publication year - 1982
Publication title -
developmental psychobiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.055
H-Index - 93
eISSN - 1098-2302
pISSN - 0012-1630
DOI - 10.1002/dev.420150202
Subject(s) - brainstem , in utero , audiology , guinea pig , noise (video) , medicine , psychology , biology , neuroscience , pregnancy , fetus , artificial intelligence , computer science , image (mathematics) , genetics
Pregnant guinea pigs were exposed to loom room noise at 115 dB A for 7.5 hr/day for various periods during the last one‐third of pregnancy. When the hearing of their offspring was tested by auditory brain stem‐evoked response techniques at 6‐dB intervals, peak IV latencies of exposed pups were found to be significantly longer than those of otherwise similar control pups. The latency differences corresponded to a 5‐dB increase in stimulus at medium stimulus levels and 10–12 dB near threshold. The results indicate that it is possible for noise‐induced hearing loss to occur in utero in mammals whose auditory maturation process is complete, or nearly so, before birth.