CC BY-NC-ND 4.0 · Int Arch Otorhinolaryngol 2019; 23(03): e292-e298
DOI: 10.1055/s-0039-1688967
Original Research
Thieme Revinter Publicações Ltda Rio de Janeiro, Brazil

Mismatch Negativity in Children with Cochlear Implant

1   Department of Audiology, Universidade Federal de São Paulo (UNIFESP), São Paulo, SP, Brazil
Daniela Gil
2   Department of Speech Language Pathology and Audiology, UNIFESP, São Paulo, SP, Brazil
Marisa Frasson de Azevedo
2   Department of Speech Language Pathology and Audiology, UNIFESP, São Paulo, SP, Brazil
› Author Affiliations
Further Information

Publication History

09 February 2019

04 April 2019

Publication Date:
28 May 2019 (online)


Introduction The mismatch negativity (MMN) is a negative long-latency auditory potential elicited by any discriminable change in a repetitive aspect of auditory stimulation. This evoked potential can provide cortical information about the sound processing, including in children who use cochlear implants.

Objective To identify MMN characteristics regarding latency, amplitude, and wave area in cochlear implanted children and to identify associations among language development, speech perception and family involvement.

Methods This is a descriptive, observational, cross-sectional study, which compared two groups: study group—children with cochlear implant, and control group—hearing children. The children were submitted to MMN evaluation with non-verbal tone burst stimulus, differing in frequency in sound field at 70 dBHL, with SmartEP equipment (Intelligent Hearing Systems, Miami, FL, USA). Speech perception and language development questionnaires were also applied, and the family participation in the rehabilitation process was classified.

Results The occurrence of MMN was 73.3% for the control group and 53.3% for the study group. Values of latency, amplitude and area of MMN of children using cochlear implants were similar to those of hearing children, and did not differ between groups. The occurrence of MMN was not correlated to the variables of hearing, language and family categories.

Conclusion Children with cochlear implants showed similar MMN responses to those of the children in the control group, with mean latency, amplitude and area of 208.9 ms (±12.8), -2.37 μV (±0.38) and 86.5 μVms (±23.4), respectively. There was no correlation between the presence of MMN and children's performance in the auditory and language development tests or family involvement during rehabilitation.


Research realized at Speech Language Pathology and Audiology Department at UNIFESP, São Paulo, SP, Brazil.

Sources of Research Assistance

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES, in the Portuguese acronym).