Normal infant and adult auditory brainstem responses to bone-conducted tones.
Auditory brainstem responses (ABRs) were recorded to 500- and 2000-Hz bone-conducted (BC) tones from normal infants and adults. Infant ABR thresholds for the 500-Hz BC tones are significantly lower than their thresholds to 2000-Hz BC tones. Infant wave V latencies to 500-Hz BC tones are significantly shorter than those of adults, whereas infant and adult responses to 2000-Hz BC tones are similar in latency, suggesting that the effective intensity of the BC tones may be 9-17 dB greater for infants than for adults. A marked asymmetry between the ipsilaterally and contralaterally recorded wave V is seen for infant responses to 500- and 2000-Hz tones at all intensities; this asymmetry is not as evident in adults, except near threshold.
Foxe
J J
JJ
Department of Otolaryngology, Rose F. Kennedy Center for Research in Mental Retardation and Human Development, Albert Einstein College of Medicine, Bronx, N.Y. 10461.
Stapells
D R
DR
D000161:Acoustic Stimulation; D000328:Adult; D000367:Age Factors; D001309:Auditory Threshold; D001844:Bone Conduction / Q000502:physiology*; D004569:Electroencephalography; D016057:Evoked Potentials, Auditory, Brain Stem / Q000502:physiology*; D005260:Female; D007839:Functional Laterality; D006309:Hearing; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D008297:Male