Clinical Significance of Impairment of Sound Localization

Sanchez-Longo, Luis P.; Forster, Francis M.

doi:10.1212/wnl.8.2.119

Cited by 141 publications

(75 citation statements)

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“…Notwithstanding, these findings disagree from the ones attained by other authors who developed a Sound Location Test and observed worse performance from individuals with temporal lobe lesion when attempting to locate sounds contralaterally to the lesion when compared to individuals without brain lesions or those with extra-temporal lesions 13,16 .…”

Section: Discussioncontrasting

confidence: 99%

Processamento auditivo em indivíduos com epilepsia de lobo temporal

Meneguello¹,

Leonhardt²,

Pereira

2006

Rev. Bras. Otorrinolaringol.

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A epilepsia do lobo temporal ocasiona descargas elétricas excessivas onde a via auditiva tem sua estação final. É uma das formas mais comuns e de mais difícil controle da doença. O correto processamento dos estímulos auditivos necessita da integridade anatômica e funcional de todas as estruturas envolvidas na via auditiva. OBJETIVO: Verificar o Processamento Auditivo de pacientes portadores de epilepsia do lobo temporal quanto aos mecanismos de discriminação de sons em seqüência e de padrões tonais, discriminação da direção da fonte sonora e atenção seletiva para sons verbais e não-verbais. MÉTODO: Foram avaliados oito indivíduos com epilepsia do lobo temporal confirmada e com foco restrito a essa região, através dos testes auditivos especiais: Teste de Localização Sonora, Teste de Padrão de Duração, Teste Dicótico de Dígitos e Teste Dicótico Não-Verbal. O seu desempenho foi comparado ao de indivíduos sem alteração neurológica (estudo caso-controle). RESULTADO: Os sujeitos com epilepsia do lobo temporal apresentaram desempenho semelhante aos do grupo controle quanto ao mecanismo de discriminação da direção da fonte sonora e desempenho inferior quanto aos demais mecanismos avaliados. CONCLUSÃO: Indivíduos com epilepsia do lobo temporal apresentaram maior prejuízo no processamento auditivo que os sem danos corticais, de idades semelhantes.

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Section: Discussioncontrasting

confidence: 99%

Processamento auditivo em indivíduos com epilepsia de lobo temporal

Meneguello¹,

Leonhardt²,

Pereira

2006

Rev. Bras. Otorrinolaringol.

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“…W tzw. amuzji zaburzone jest przetwarzanie muzyki, przy czym w uszkodzeniach prawopółkulowych zaburzone jest przede wszystkim rozpoznawanie melodii i rytmu [139,188].…”

Section: Inne Objawy Otologiczne W Chorobach Naczyniowych Mózguunclassified

“…Jako pierwsi lokalizację dźwięku u chorych z udarem mózgu przeprowadzili Sanchez-Longo i wsp. w 1958 roku [188]. Do tej oceny wykorzystali oni perymetr okulistyczny z umieszczaną w 13 różnych pozycjach słuchawką audiometru.…”

Section: 5 Potencjały Wywołane Pnia Mózgu (Abr)unclassified

“…Jednostronne zmiany w korze płata skroniowego powodują subtelne upośledzenie słuchu. Może ono wynikać z trudności dyskryminacji zniekształconej, zwolnionej lub przyspieszonej mowy podawanej do przeciwnego ucha [78] lub upośledzenia lokalizacji dźwięku w przeciwległym polu słuchowym [188]. Uszkodzenie tożstronne płata skroniowego dominującej półkuli mózgu, którą u ludzi praworęcznych jest lewa półkula, najczęściej powodujące upośledzenie s ł uchu, może nie wpływać na lokalizację dźwięku [55].…”

Section: 5 Potencjały Wywołane Pnia Mózgu (Abr)unclassified

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Stan słuchu u chorych we wczesnym okresie udaru niedokrwiennego mózgu

Przewoźny¹

2007

Otolaryngologia Polska

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“…An intact auditory cortex is essential for normal sound localization, as demonstrated by localization deficits that result from cortical lesions in humans [1][2][3][4] and experimental animals [5][6][7]. Numerous studies have explored the neurophysiological mechanisms for location coding in the auditory cortex.…”

Section: Introductionmentioning

confidence: 99%

Cortical codes for sound localization

Furukawa¹,

Middlebrooks

2001

Acoust. Sci. & Tech.

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Abstract:It is well known that there is a point-to-point map of auditory space in the midbrain: each neuron is tuned to a particular sound-source location, and neurons' preferred locations are topographically represented in a neural structure. In the auditory cortex, however, researchers have consistently failed to demonstrate evidence for such an auditory space map, despite the well-known necessity of the auditory cortex for normal sound localization. Cortical neurons show generally broad spatial tuning, and the preferred locations are not systematically organized on the cortex in a topographical fashion. An alternative hypothesis is presented here: Individual single neurons represent auditory space panoramically by space-specific characteristics of their spike patterns. Information about any particular sound-source location is distributed across a large population of neurons, and we predict accurate localization judgement by combining information across those neurons. In our analyses of experimental data using an artificial neural network algorithm, we were able to recognize spike patterns of single neurons to identify sound-source locations throughout 360 • of space. The amount of information carried by a moderate size of neural ensemble appeared sufficient to account for the accuracy of location judgements by behaving animals.

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Clinical Significance of Impairment of Sound Localization

Cited by 141 publications

References 0 publications

Processamento auditivo em indivíduos com epilepsia de lobo temporal

Processamento auditivo em indivíduos com epilepsia de lobo temporal

Stan słuchu u chorych we wczesnym okresie udaru niedokrwiennego mózgu

Cortical codes for sound localization

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