乳幼児の発達と聴性脳幹反応および聴性行動反応の変化

DOI

書誌事項

タイトル別名
  • The Correlation of Brain Stem Responses and Behavioral Audiometry in Neonates, Infants and Adults

この論文をさがす

抄録

Auditory brain stem responses (BSR) and con ventional audiometry in ninety normal neonates and infants and ten normal adults were carried out.<BR>Wave forms, latency and threshold of the BSR with developmental changes were measured. Conventional audiometry was performed as fol lows: 1-3 months: behavioral observation audio metry, 4 months-2 years: conditioned orientation refelx audiometry, 3-4 years: play audiometry, 5 years old and adults: standard pure tone audio metry.<BR>1. Waveforms of the BSR are not well diffe rentiated in neonates and young infants, but reach a mature waveform pattern by two years of age.<BR>2. There was a trend for all peak latencies to decrease with age. This effect was particularly pronounced for the later BSR components (III, IV, V, VI and VII).<BR>3. BSR thresholds, as determined by the thre shold of wave V, decreased with age. Neonate s had the highest BSR thresholds (mean=45 dB), and adults had the lowest (mean=5 dB).<BR>4. A similar pattern was observed for behavio ral audiometric thresholds as that for the BSR thresholds. Neonates had the highest thresholds (mean=90 dB), and adults had the lowest (mean) =0 dB).<BR>5.The threshold functions determined by both methods converged with age.The functions cros sed between the ages 1.5 and 2 years.<BR>In conclusion, i) The BSR is a useful index of brain stem maturation. ii) The threshold of BSR audiometry is lower than those of the behavioral observation audiometry and conditioned orienta tion reflex audiometry for young infants. For that reason, the BSR is very useful for objective audiometry in neonates and infants.iii) When the difference of the thresholds between the BSR and conventional audiometry in infants are noted, we will have a clue to understanding the relationship between the development of the brain stem and the higher function of nervous system.

収録刊行物

  • 脳と発達

    脳と発達 10 (4), 284-290, 1978

    THE JAPANESE SOCIETY OF CHILD NEUROLOGY

キーワード

詳細情報 詳細情報について

問題の指摘

ページトップへ