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Predicate | Object |
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rdf:type | |
lifeskim:mentions | |
pubmed:issue |
1
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pubmed:dateCreated |
1992-12-29
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pubmed:abstractText |
Click intensity effect (90 to 0 dB HL) on amplitude of the auditory brainstem responses (ABAR) was studied in 152 normal children from birth to 6 years and 16 adults. All age groups showed similar amplitude-intensity functions for waves I and V. Wave I amplitude exhibited a 'transitional' response at 60 dB HL intensity, whereas wave V exhibited a more gradual change. As the clicks were decreased from 90 to 60 dB HL, amplitude reduction was much more dramatic for wave I (mean 57%) than for wave V (mean 30%), and the V/I amplitude ratio more than doubled (mean 70%). At moderate intensity range, the reduction in amplitude with the decrease in intensity is only slightly more for wave I than for wave V, and the V/I ratio continued to increase, but more slowly. Wave V amplitude changed linearly with click intensity at the rate of 0.024-0.042 microV/dB for different age groups. The older the children, the larger the decrement of wave V amplitude with decreasing intensity, which was accompanied by an age-related difference in the absolute amplitude at equal click intensities. The V/I amplitude ratio increased with decreasing intensity at a rate of about 0.01/dB, showing no apparent age-related difference.
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pubmed:language |
eng
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pubmed:journal | |
pubmed:citationSubset |
IM
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pubmed:status |
MEDLINE
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pubmed:issn |
0105-0397
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pubmed:author | |
pubmed:issnType |
Print
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pubmed:volume |
20
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pubmed:owner |
NLM
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pubmed:authorsComplete |
Y
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pubmed:pagination |
41-7
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pubmed:dateRevised |
2006-11-15
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pubmed:meshHeading |
pubmed-meshheading:1842268-Acoustic Stimulation,
pubmed-meshheading:1842268-Adult,
pubmed-meshheading:1842268-Child,
pubmed-meshheading:1842268-Child, Preschool,
pubmed-meshheading:1842268-Evoked Potentials, Auditory, Brain Stem,
pubmed-meshheading:1842268-Female,
pubmed-meshheading:1842268-Hearing,
pubmed-meshheading:1842268-Humans,
pubmed-meshheading:1842268-Infant,
pubmed-meshheading:1842268-Infant, Newborn,
pubmed-meshheading:1842268-Male,
pubmed-meshheading:1842268-Sleep
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pubmed:year |
1991
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pubmed:articleTitle |
Intensity effect on amplitude of auditory brainstem responses in human.
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pubmed:affiliation |
Department of Child Health, Children's Hospital, Shanghai Medical University, P.R.C.
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pubmed:publicationType |
Journal Article,
Comparative Study
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