PMID- 9307322 OWN - NLM STAT- MEDLINE DCOM- 19980107 LR - 20190822 IS - 0378-5955 (Print) IS - 0378-5955 (Linking) VI - 111 IP - 1-2 DP - 1997 Sep TI - Rate and adaptation effects on the auditory evoked brainstem response in human newborns and adults. PG - 165-76 AB - Auditory evoked brainstem response (ABR) latencies increased and amplitudes decreased with increasing stimulus repetition rate for human newborns and adults. The wave V latency increases were larger for newborns than adults. The wave V amplitude decreases were smaller for newborns than adults. These differences could not be explained by developmental differences in frequency responsivity. The transition from the unadapted to the fully adapted response was less rapid in newborns than adults at short (= 10 ms) inter stimulus intervals (ISIs). At longer ISIs (= 20 ms) there were no developmental differences in the transition to the fully adapted response. The newborn transition occurred in a two stage process. The rapid initial stage observed in adults and newborns was complete by about 40 ms. A second slower stage was observed only in newborns although it has been observed in adults in other studies (Weatherby and Hecox, 1982; Lightfoot, 1991; Lasky et al., 1996). These effects were replicated at different stimulus intensities. After the termination of stimulation the return to the wave V unadapted response took nearly 500 ms in newborns. Neither the newborn nor the adult data can be explained by forward masking of one click on the next click. These results indicate human developmental differences in adaptation to repetitive auditory stimulation at the level of the brainstem. FAU - Lasky, R E AU - Lasky RE AD - The University of Wisconsin-Madison Medical School, Department of Neurology, 53792-5132, USA. LA - eng GR - R01 NS20647-01A1/NS/NINDS NIH HHS/United States PT - Comparative Study PT - Journal Article PT - Research Support, U.S. Gov't, P.H.S. PL - Netherlands TA - Hear Res JT - Hearing research JID - 7900445 SB - IM MH - Acoustic Stimulation MH - Adolescent MH - Adult MH - Aging/*physiology MH - Auditory Threshold/physiology MH - Brain Stem/*growth & development MH - Evoked Potentials, Auditory, Brain Stem/*physiology MH - Humans MH - Infant, Newborn MH - Linear Models EDAT- 1997/11/05 00:00 MHDA- 1997/11/05 00:01 CRDT- 1997/11/05 00:00 PHST- 1997/11/05 00:00 [pubmed] PHST- 1997/11/05 00:01 [medline] PHST- 1997/11/05 00:00 [entrez] AID - S0378-5955(97)00106-8 [pii] AID - 10.1016/s0378-5955(97)00106-8 [doi] PST - ppublish SO - Hear Res. 1997 Sep;111(1-2):165-76. doi: 10.1016/s0378-5955(97)00106-8.