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Int Arch Otorhinolaryngol 2012; 16(03): 335-340
DOI: 10.7162/S1809-97772012000300006
Original Article
Thieme Publicações Ltda Rio de Janeiro, Brazil

Auditory middle latency response in children with learning difficulties

Ana Claudia Figueiredo Frizzo
1   PHD in Nueroscience, Medicine School of Ribeirão Preto - USP. Professor of the Department of Speech Pathology, Faculty of Sciences of the Universidade Estadual Paulista - FFC / UNESP, Marilia/SP - Brazil.
,
Myriam Lima Issac
2   PHD in Medicine Pediatric Area, Medicine School of Ribeirão Preto - USP. Professor of the Department of Ophtalmology, Otolaryngology, Head Neck, Medicine School of Ribeirão Preto - USP, Ribeirão Preto/SP - Brazil.
,
Angela Cristina Pontes-Fernandes
3   PHD in Psichology, São Paulo University - USP. Hospital Psicologist oh the Medicine School Hospital of Ribeirão Preto - USP, Ribeirão Preto/SP - Brasil.
,
Pedro de Lemos Menezes
4   PHD in Applied Physics in Medicine and Biology, São Paulo University-USP. Professor oh the Departament Speech Pathology of Alagoas State University Health Sciences - UNCISAL.
,
Carolina Araújo Rodrigues Funayama
5   PHD and Full Professor in Child Neurology, Medicine School of Ribeirão Preto - USP. Professor of the Department of Neurology, Medicine School of Ribeirão Preto - USP, Ribeirão Preto/SP - Brazil.
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Publikationsverlauf

16. November 2011

06. März 2012

Publikationsdatum:
05. Dezember 2013 (online)

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Summary

Introduction: This is an objective laboratory assessment of the central auditory systems of children with learning disabilities.

Aim: To examine and determine the properties of the components of the Auditory Middle Latency Response in a sample of children with learning disabilities.

Methods: This was a prospective, cross-sectional cohort study with quantitative, descriptive, and exploratory outcomes. We included 50 children aged 8–13 years of both genders with and without learning disorders. Those with disorders of known organic, environmental, or genetic causes were excluded.

Results and Conclusions: The Na, Pa, and Nb waves were identified in all subjects. The ranges of the latency component values were as follows: Na = 9.8–32.3 ms, Pa = 19.0–51.4 ms, Nb = 30.0–64.3 ms (learning disorders group) and Na = 13.2–29.6 ms, Pa = 21.8–42.8 ms, Nb = 28.4–65.8 ms (healthy group). The values of the Na-Pa amplitude ranged from 0.3 to 6.8 ìV (learning disorders group) or 0.2–3.6 ìV (learning disorders group). Upon analysis, the functional characteristics of the groups were distinct: the left hemisphere Nb latency was longer in the study group than in the control group. Peculiarities of the electrophysiological measures were observed in the children with learning disorders. This study has provided information on the Auditory Middle Latency Response and can serve as a reference for other clinical and experimental studies in children with these disorders.

Keywords

evoked potentials - auditory - evoked potentials - learning
 

  • References

  • 1 Richmond M, Robinson C, Sachs-Israel M , (ed) The Global Literacy Challenge. A profile of youth and adult literacy at the mid-point of the United Nations Literacy Decade 2003-2012. United Nations Educational Scientific and Cultural Organization (UNESCO) 2008;
    Google Scholar
  • 2 Simos PG, Rezaie R, Fletcher JM, Juranek J, Papanicolaou AC. Neural correlates of sentence reading in children with reading difficulties. Neuroreport 2011; 22 (14) 674-8
    CrossrefGoogle Scholar
  • 3 Purdy SC, Kelly AS, Davies MG. Auditory brainstem response, middle latency response, and late cortical evoked potentials in children with learning disorders. J Am Acad Audiol 2002; 13 (7) 367-382
    Google Scholar
  • 4 Arehole S, Augustine LE, Simhadri R. Middle latency response in children with learning disbilities: preliminary findings. Journal of Comunications Desorders 1995; 28: 21-38
    Google Scholar
  • 5 Ozdamar O, Kraus N. Auditory middle latency responses in humans. Audiology 1983; 22: 34-49
    CrossrefGoogle Scholar
  • 6 Musiek FE, Baran JA, Pinheiro ML. Neuroaudiology: case studies. San Diego : Singular Publishing Group; 1994: 279 p.
    Google Scholar
  • 7 Borges CF. Processamento temporal auditivo em crianças com transtornos de leitura. [Mestrado] – Faculdade de Medicina da Universidade de São Paulo, São Paulo; 2005
    Google Scholar
  • 8 Geisler CD, Frishkopf LS, Rosenblith WA. Extracranial responses to acoustic clicks in man. Science 1958; 128: 1210-11
    CrossrefGoogle Scholar
  • 9 Heaton RK, Chelune GJ, Talley JL, Kay GG, Curtiss G, Teste Wisconsin de Classificação de Cartas: manual revisado e ampliado. Adaptação e padronização brasileira. Cunha JÁ, Trentini CM, Argimon IL, Oliveira MS, Werlang BG, Prieb RG. São Paulo: Casa do Psicólogo; 2005
    Google Scholar
  • 10 Wechsler D, WISC III: Wechsler intelligence scale for children-manual. 1991. Adaptação e padronização de uma amostra brasileira. Figueiredo VLM. São Paulo: Casa do Psicólogo; 2002
    Google Scholar
  • 11 Tabaquim MLM. Validação do Exame Neuropsicológico e análise das funções corticais superiores em crianças do ensino fundamental. Tese de Pós-Doutorado. Faculdade de Ciências Médicas. Unicamp/Campinas. 2008
    Google Scholar
  • 12 Moojen S, Lamprecht R, Santos RM, Freitas GM, Brodacz R, Siqueira M , et al. CONFIAS - Consciência fonológica: instrumento de avaliação sequencial. São Paulo: Casa do Psicólogo; 2003
    Google Scholar
  • 13 Capellini AS, Toyota P, Santos LCA, Lourencetti MD, Padula NAMR. Caracterização do desempenho fonológico, da leitura e da escrita de escolares com dislexia e distúrbio de aprendizagem. Aprender: caderno de filosofia e educação; 2007. 9. 37-70
    Google Scholar
  • 14 Silver CH, Ruff RM, Iverson GL, Barth JT, Broshek DK, Bush SS, Koffer SP, Reynolds CR . Nan Policy and Planning Commitee. Learning disabilities: The need for neuropsycological evaluation. Arch Clin Neuropsychol 2008; 23: 217-219
    CrossrefGoogle Scholar
  • 15 Jasper H. The ten-twenty electrode system of the Internacional Federation. Electroencephalogr Clin Neurophysiol 1958; 10: 371-375
    Google Scholar
  • 16 Mcgee T, Kraus N. Auditory development reflected by middle latency response. Ear and Hear 1996; 17: 419-429
    Google Scholar
  • 17 Costa SMB, Costa Filho AO, Cardoso MRA. Estudo do potencial auditivo de média latência: efeito de orelha, sexo e idade. Pro-fono R Atual Cient 2003; 15 (2) 181-188
    Google Scholar
  • 18 Frizzo ACF, Funayma CAR, Isaac ML, Colafêmina JF. Potenciais evocados auditivos de média latência: estudo em crianças saudáveis. Rev Bras Otorrinol 2007; 73 (3) 398-403
    Google Scholar
  • 19 Habib M. The neurological basis of developmental dyslexia: an overview and working hypothesis. Brain. B 2000; 123 (12) 2373-99
    Google Scholar
  • 20 Bonifacci P, Snowling MJ. Speed of processing and reading disability: A cross-linguistic investigation of dyslexia and borderline intellectual functioning. Cognition 2008; 107: 999-1017
    CrossrefGoogle Scholar