Auditory brainstem responses from graduates of an intensive care nursery

Normal patterns of response

Michael P Gorga, J. K. Reiland, K. A. Beauchaine, D. W. Worthington, Walt Jesteadt

Research output: Contribution to journalArticle

46 Citations (Scopus)

Abstract

Auditory brainstem responses (ABR) were obtained from graduates of an intensive care nursery (ICN) when those babies were in stable physiological states and ready for hospital discharge. Intensity ranged from ABR threshold to 80 dB nHL, and all recordings were made in a sound-isolated chamber. The data reviewed here are from 585 babies having presumably normal hearing, based upon bilateral ABR thresholds of 30 dB nHL or less. To insure that estimates of population statistics were not biased by high correlations between ears, only the data from the left ears were used in most analyses. Larger correlations were observed between conceptional age (CA) and ABR latencies than between either gestational age (GA) or chronological age (CA) and the same latencies. Data were grouped into six CA groups for further analyses. Distributions of all response-component latencies were similar in shape and depended upon CA, showing orderly decreases in latency with increasing age. None of these distributions differed significantly from normal, and they were well fitted by normal ogives. Thus, accurate estimates of percentiles can be obtained from the means and standard deviations. The results indicate that it is important to take CA into account when evaluating ABR latencies.

Original languageEnglish (US)
Pages (from-to)311-318
Number of pages8
JournalJournal of Speech and Hearing Research
Volume30
Issue number3
StatePublished - Dec 1 1987

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Brain Stem Auditory Evoked Potentials
Nurseries
Critical Care
graduate
Reaction Time
Ear
baby
population statistics
State Hospitals
Population Characteristics
Hearing
Gestational Age
chamber
Age Groups
Intensive Care
recording
age group
Latency

ASJC Scopus subject areas

  • Otorhinolaryngology

Cite this

Auditory brainstem responses from graduates of an intensive care nursery : Normal patterns of response. / Gorga, Michael P; Reiland, J. K.; Beauchaine, K. A.; Worthington, D. W.; Jesteadt, Walt.

In: Journal of Speech and Hearing Research, Vol. 30, No. 3, 01.12.1987, p. 311-318.

Research output: Contribution to journalArticle

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