Auditory brainstem responses of children with developmental language disorders.
Brainstem auditory evoked potentials (BAEPs) were recorded from 48 children with language disorders (aged four to nine years old, IQs normal to borderline, normal audiometric thresholds and attending special school) and 20 healthy children (four to eight years old, with normal IQs, audiometry and school-level). The language-disabled group showed significantly lower absolute latency values of the BAEPs than controls. There were no significant differences in the central conduction time of the auditory pathway (I-V interval). Therefore, the only significant difference corresponded to a minor value for the first wave (auditory nerve discharge) of the BAEP. A reduction in the control mechanisms of the sensory inputs at the peripheral level, or a disturbance in the inhibitory mechanisms of cortico-subcortical modulation, might explain these findings.
Roncagliolo
M
M
Departamento de Fisiología, Facultad de Medicina, Universidad de Valparaíso, Chile.
Benítez
J
J
Pérez
M
M
D001037:Aphasia / Q000175:diagnosis* / Q000503:physiopathology; D002648:Child; D002675:Child, Preschool; D016057:Evoked Potentials, Auditory, Brain Stem; D005260:Female; D006801:Humans; D008297:Male; D011930:Reaction Time