Normal Values and Development of Click- Auditory Brainstem Responses in Children of 3~5 Years Old / 听力学及言语疾病杂志

ABSTRACT

Objective To study the normal ranges and features for click-auditory brainstem responses of children in 3~5 years old.Methods Normal results of click-ABR from 132 normal children (224 ears)were ana-lyzed.The children were divided into three groupsGroup A (74 ears from children of 3 years old),Group B (78 ears from children of 4 years old)and Group C (72 ears from children of 5 years old).The ABR data were statisti-cally analyzed by ANOVA with SPSS.Results At 80 dB nHL,the wave Ⅰ,Ⅲ,and Ⅴ latencies and intervals of wave Ⅰ- Ⅲ,and wave Ⅰ-Ⅴ of ABR for 3 -year old children were 1.24 ±0.09 ms,3.53 ±0.16 ms,5.39 ± 0.23 ms,2.30±0.15ms and 4.15 ±0.22 ms,respectively,and for 4 -year-old children,they were1.23 ±0.10 ms,3.52±0.39 ms,5.30±0.21 ms,2.28±0.39 ms and 4.07 ±0.22 ms,respectively.For 5 - year-old chil-dren,they were1.24±0.10 ms,3.67±0.63 ms and 5.34±0.19 ms,2.42±0.63 ms and 4.09±0.19 ms,respec-tively.The thresholds for 3-year children were 22.57 ±4.40 dB nHL,for 4 - year children,21.15 ±4.83 dB nHL,and for 5 - year children,21.11±3.48 dB nHL.Among three groups,only latency of wave V and interval of wave I-V had statistical differences,and a further analysis showed the statistical differences in Groups A and B. No statistical differences were observed in Groups B and C.The latency of wave I and thresholds of ABR for the children of different ages were not significantly different.Conclusion The resvits of this study suggest the brainstem may mature at 4 years old.