Frequency-specific maturation of the eighth nerve and brain-stem auditory pathway: evidence from derived auditory brain-stem responses (ABRs).
J Acoust Soc Am
; 91(3): 1576-86, 1992 Mar.
Article
em En
| MEDLINE
| ID: mdl-1564195
ABSTRACT
Previous studies of human auditory development using frequency-specific auditory brain-stem responses (ABRs) have reported that maturation for both peak and interpeak latencies occurs earlier for responses generated by low-frequency stimuli. In two of these studies, low-frequency ABRs presumed to originate from apical locations in the cochlea were likely dominated by activity from higher frequency regions closer to the base. In the present study, the high-pass noise-masking technique was used to generate derived ABRs that represent activity from isolated place specific regions along the basilar membrane. Analysis of auditory brain-stem maturation based on I-V interpeak latency differences with adult means revealed a frequency-specific pattern of development. Developmental changes occurred faster and mature function was attained earlier for ABRs from the mid-center-frequency (CF) derived conditions than from either the highest or lowest CF derived conditions. The differential maturation of mid-CF derived ABRs may reflect the delayed effects of the pattern of development that occurs in the cochlea.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Discriminação da Altura Tonal
/
Nervo Vestibulococlear
/
Tronco Encefálico
/
Recém-Nascido Prematuro
/
Potenciais Evocados Auditivos
Limite:
Female
/
Humans
/
Male
/
Newborn
Idioma:
En
Revista:
J Acoust Soc Am
Ano de publicação:
1992
Tipo de documento:
Article
País de afiliação:
Canadá