[Temporal resolution: analysis in term and preterm preschoolers].
BACKGROUND
auditory processing.


OBJECTIVE
to verify the hearing behavior of temporal resolution in children with ages from five to six years, who were born preterm, with no evidence of neurological alterations and to compare this behavior to that observed in children of the same age, who were born at term, with low risk for developmental disorders, taking into consideration the variables of: threshold detection gaps through pre-established frequency, binaural and monaural presentation, order of stimuli presentation and gender.


METHODS
70 children divided in two groups: Group 1 with 44 children who were born at term (20 female and 24 male) and Group 2 with 26 preterm children (12 female and 14 male). Children were submitted to audiologic evaluation composed of audiometry, speech response threshold, acoustic impedance test and the Random Gap Detection Test (RGDT).


RESULTS
children who were born at term presented lower threshold detection gaps in the RGDT, for both monaural and binaural stimuli presentation, in all of the pre-established frequencies when compared to preterm children. This difference between the groups was statistically significant. The average threshold detection gaps of Group 1 rose according to the increase of frequency. For Group 2 statistically significant differences were not found regarding the average of threshold detection gaps, for both monaural and binaural stimuli presentation.


CONCLUSIONS
preterm children differ from those born at term regarding the hearing behavior of temporal resolution. The RGDT can be used as a tool to evaluate the hearing process, once the early detection of alterations in temporal processes indicates the need for intervention in order to minimize or avoid future language impairments.
Fortes
Ana Beatriz
AB
Departamento de Fonoaudiologia, Univeisidade Federal de São Paulo. ab.fortes@uol.com.br
Pereira
Liliane Desgualdo
LD
Azevedo
Marisa Frasson de
MF
D000161:Acoustic Stimulation / Q000379:methods; D001307:Auditory Perception / Q000502:physiology*; D001309:Auditory Threshold / Q000502:physiology; D002648:Child; D002675:Child, Preschool; D005260:Female; D006320:Hearing Tests; D006801:Humans; D007231:Infant, Newborn; D007234:Infant, Premature; D008297:Male; D011930:Reaction Time / Q000502:physiology*; D012016:Reference Values; D047929:Term Birth