[The influence of click polarity and stimulation rate on the auditory evoked response in relation to age]. / Influenza della polarità dei clicks e della frequenza di stimolazione sulle risposte acustiche evocate (ABR) in rapporto all'età.
Pediatr Med Chir
; 11(5): 523-7, 1989.
Article
em It
| MEDLINE
| ID: mdl-2631058
ABSTRACT
In order to study the changes which occur in phase of the click stimulus and its relation to the stimulus repetition rate on the auditory brainstem response (ABR) as a function of age, the Authors recorded the ABR from the scalp's surface of 10 newborns and 40 infants, 3 months, 6 months, 1 year and 3 years old as well as from 10 normal adults. The stimulus was a square wave of 0.1 msec duration and 90 dBHL level. The stimulus equipment was calibrated twice under visual inspection to ensure that the C and R clicks resulted in an initial membrane deflection toward and from the ear drum respectively. No significant differences could be found for the latencies and amplitude in the C-R comparison. However, the mean values of the complete group of test subjects showed most intraindividual stability for the conventional click stimulation. The latency of the ABR with excitation of the cochlea seemed to be mainly determined by the internal oscillation sequence in the cochlea and not by the stimulus polarity. The amplitudes and latencies of the ABR components tend to decrease when the stimulus rate increases and the age decreases. The importance of the stimulus characteristics is discussed and some suggestions for clinical use of ABR are made.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Tempo de Reação
/
Tronco Encefálico
/
Potenciais Evocados Auditivos
Limite:
Adult
/
Child, preschool
/
Humans
/
Infant
/
Newborn
Idioma:
It
Revista:
Pediatr Med Chir
Ano de publicação:
1989
Tipo de documento:
Article
País de afiliação:
Itália