Role of the medial olivocochlear system among children with ADHD.
Attention deficit hyperactivity disorder (ADHD) patients show, as one of the main symptoms, an attentional impairment. Selective attention in the hearing process is the ability to understand speech in a noisy environment, which can be evaluated by several methods. One of the main approaches is the functioning of the Medial Olivocochlear Efferent System, which can be accessed by Transient-Evoked Otoacoustic Emissions (TOAE).


OBJECTIVE
This study aimed at evaluating the suppression effect of contralateral noise on TOAE in ADHD (study group) and normal subjects (control group).


METHODS
Case-control study.


METHODS
A study with 20 children distributed in two, age- and gender-matched groups.


RESULTS
No differences were found in TOAE responses between the two groups, with and without noise.


CONCLUSIONS
We conclude that there were no functional differences in the Medial Olivocochlear Efferent System in the two groups analyzed.
Department of Basic Psychological Processes, Psychology Institute, University of Brasilia, Brasilia, Brazil. 　vrcantopereira@unb.br
Valéria Reis do Canto
VR
Pereira
Maria Ângela Guimarães
MÂ
Feitosa
Luiz Henrique Mourão do Canto
LH
Pereira
Marisa Frasson de
MF
Azevedo
D000161:Acoustic Stimulation; D001289:Attention Deficit Disorder with Hyperactivity / Q000503:physiopathology*; D001309:Auditory Threshold; D016022:Case-Control Studies; D002648:Child; D003051:Cochlea / Q000502:physiology*; D005260:Female; D006801:Humans; D008297:Male; D009847:Olivary Nucleus / Q000502:physiology*; D017084:Otoacoustic Emissions, Spontaneous / Q000502:physiology*