Potenciais evocados auditivos de longa latência: um estudo comparativo entre hemisférios cerebrais

Frizzo, Ana Cláudia Figueiredo; Alves, Renata P. C.; Colafêmina, José Fernando

doi:10.1590/s0034-72992001000500004

Cited by 15 publications

(19 citation statements)

References 24 publications

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“…These findings concur with those of Frizzo et al 12 who did not find statistically significant differences in the P300 of right and left ears after non-verbal stimuli in normal hearing adults.…”

Section: Discussionsupporting

confidence: 93%

P300 com estímulo verbal e não verbal em adultos normo-ouvintes

Massa¹,

Rabelo²,

Matas³

et al. 2011

Braz. j. otorhinolaryngol. (Impr.)

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The P300 results from focusing attention on rare stimuli in the midst of other frequent stimuli; it tests recent attention and memory, both of which depend on discriminating among verbal or nonverbal stimuli. Aim:To compare the P300 with verbal and nonverbal stimuli in normal-hearing adults. Material and Method:A prospective study was made of 15 male subjects aged from 22 to 55, with no hearing complaints. The subjects underwent short and long latency (P300) auditory evoked potentials with verbal and non-verbal stimuli. Results:The mean P300 latency with verbal stimuli was significantly higher than the P300 with nonverbal stimuli. The P300 amplitudes were significantly lower for verbal compared with nonverbal stimuli. Conclusion:There were no differences between ears with respect to P300 latencies and amplitudes for both non-verbal and verbal stimuli. Latencies were higher with verbal stimuli; amplitudes had lower values. Braz J Otorhinolaryngol. 2011;77(6):686-90. BJORL ORIGINAL ARTICLE

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Section: Discussionsupporting

confidence: 93%

P300 com estímulo verbal e não verbal em adultos normo-ouvintes

Massa¹,

Rabelo²,

Matas³

et al. 2011

Braz. j. otorhinolaryngol. (Impr.)

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“…A study investigated the interhemispheric differences related to amplitude and latency of the P3 30 , however, no significant results were found, which contradicts previously published data, according to which the amplitude of P3 is significantly greater than in the right hemisphere 31 .…”

Section: Discussioncontrasting

confidence: 59%

Resolução temporal e potenciais corticais em diferentes níveis de proficiência da língua inglesa

et al. 2017

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Purpose: to investigate and compare hearing abilities in normal hearing bilingual students, at different levels of English proficiency (basic, intermediate and advanced), using behavioral testing and electrophysiological testing. Methods: this study is descriptive, quantitative and transversal. The sample consisted of 60 subjects (language schools students at different English proficiency levels: 20 at advanced level (AG); 20 at intermediate level (IG); 20 at basic level (BG)) with normal hearing and no complaints about auditory processing abilities, aged 18-35 years. They were subjected to behavioral test: Random Gap Detection Test (RGDT) that assesses ability of temporal resolution; and electrophysiological test Long Latency Auditory Evoked Potential (LLAEP) with verbal stimuli (syllables /ba/ -frequent stimulus and /di/ -rare stimulus) evaluating memory, attention and auditory discrimination. Results: it was noticed a statistically significant difference between ears for: BG, to amplitude of N1 and P2, with higher values for left ear; IG to amplitude of P1, N1 and P2, with higher values for left ear; AG to latency of N1, with higher values for left ear, and amplitudes of components P2, N2 and P3, with higher values for left ear. Between groups, RGDT showed lower values of AG, and latency of N1 component, with higher values for BG. Conclusion: there were significant differences in temporal resolution ability, better for students in advanced level of English and also to the latency of evoked cortical N1 with higher values for students at a basic level. Keywords: Hearing; Bilingualism; Electrophysiology; Event-Related Potentials, P300; Adult RESUMO Objetivos: investigar e comparar as habilidades auditivas entre normo-ouvintes bilíngues estudantes de diferentes níveis de proficiência do inglês por meio de teste comportamental e eletrofisiológico. Métodos: este estudo tem caráter descritivo, quantitativo e transversal. A amostra foi composta por 39 sujeitos (alunos de escolas de idiomas: 13 no nível avançado (GA); 13 no nível intermediário (GI); 13 no nível básico (GB)), com idade entre 18 a 35 anos, limiares auditivos tonais dentro dos limites da normalidade e sem queixas de habilidades de processamento auditivo. Foram submetidos aos testes comportamentais: teste de detecção de gap (RGDT); e ao teste eletrofisiológico potencial evocado auditivo de longa latência (PEALL), com estímulos verbais (sílabas /ba/ -frequente -e /di/ -raro) Resultados: verificou-se diferença estatisticamente significante entre as orelhas para: o GB, para a amplitude de N1 e P2, com maiores valores para a orelha esquerda; o GI, para a amplitude de P1, N1 e P2, com maiores valores para a orelha esquerda, o GA, para a latência do componente N1, com maiores valores para a orelha esquerda, e, para as amplitudes dos componentes P2, N2 e P3, com maiores valores para a orelha esquerda. Entre os grupos, o teste RGDT mostrou menores valores para GA e para latência do componente N1, com maiores valores para o GB. Conclusões: pode-se concluir...

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“…They suggested that this may be due to functional hemispheric asymmetry, with greater amplitude in the right hemisphere, which is responsible for the processing of nonverbal stimuli. Frizzo et al 36 point out the great variability obtained when recording these potentials. Due to a lack of general agreement among researchers on the application of this technique, it is not commonly used by audiologists.…”

mentioning

confidence: 99%