Mismatch negativity in children with developmental Dyslexia.

OBJECTIVE

To describe and compare the latencies and amplitudes of Mismatch Negativity between children with and without Developmental Dyslexia.

METHODS

Cross-sectional and comparative study, consisting of a study group of 52 children with Developmental Dyslexia and a control group of 52 children with typical development, matched by age and sex, aged between 9 years and 11 years and 11 months of both sexes. All participants underwent Otoscopy, Acoustic Immittance Measurements, Pure Tone Audiometry, Speech Audiometry, Brainstem Auditory Evoked Potential and Mismatch Negativity.

RESULTS

It was verified a statistically significant difference when comparing Mismatch Negativity latencies between the groups, with higher values for children with Developmental Dyslexia (p = 0.012). However, there was no statistically significant difference in Mismatch Negativity amplitudes between the groups studied.

CONCLUSION

The results suggest that children with Developmental Dyslexia may present difficulties in auditory processing and discrimination skills compared to children with typical development.