Correlative changes of auditory nerve and microphonic potentials throughout sleep

Velluti, Ricardo A.; Pedemonte, Marisa; García-Austt, E.

doi:10.1016/0378-5955(89)90091-9

Cited by 41 publications

(28 citation statements)

References 13 publications

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“…Some of the proposed functions of the efferent auditory system are (1) antimasking effects in presence of noise (Kawase and Liberman, 1993), (2) protection from loud sound damage (Maison and Liberman, 2000), (3) modulation of auditory activity during awake/sleep states (Velluti et al, 1989), and (4) modulation of cochlear sensitivity during cross-modal attention (Oatman, 1971). Here, we provide clear evidence for the latter function by demonstrating a clear and repeatable reduction of cochlear sensitivity during the period of visual selective attention in animals performing a visual discrimination task.…”

Section: Auditory Frequency-specific Efferent Effectsmentioning

confidence: 99%

Selective Attention to Visual Stimuli Reduces Cochlear Sensitivity in Chinchillas

Délano¹,

Elgueda²,

Hamamé³

et al. 2007

J. Neurosci.

147

141

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It is generally accepted that during periods of attention to specific stimuli there are changes in the neural activity of central auditory structures; however, it is controversial whether attention can modulate auditory responses at the cochlear level. Several studies performed in animals as well as in humans have attempted to find a modulation of cochlear responses during visual attention with contradictory results. Here, we have appraised cochlear sensitivity in behaving chinchillas by measuring, with a chronically implanted roundwindow electrode, sound-evoked auditory-nerve compound action potentials and cochlear microphonics, a measure of outer hair cell function, during selective attention to visual stimuli. Chinchillas were trained in a visual discrimination or in an auditory frequency discrimination two-choice task. We found a significant decrease of cochlear sensitivity during the period of attention to visual stimuli in the animals performing the visual discrimination task, but not in those performing the auditory task, demonstrating that this physiological effect is related to selective attention to visual stimuli rather than to an increment in arousal level. Furthermore, the magnitude of the cochlear-sensitivity reductions increased in sessions performed with shorter target-light durations (4 -0.5 s), suggesting that this effect is stronger for higher attentional demands of the task. These results demonstrate that afferent auditory activity is modulated by selective attention as early as at sensory transduction, possibly through activation of olivocochlear efferent fibers.

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Section: Auditory Frequency-specific Efferent Effectsmentioning

confidence: 99%

Selective Attention to Visual Stimuli Reduces Cochlear Sensitivity in Chinchillas

Délano¹,

Elgueda²,

Hamamé³

et al. 2007

J. Neurosci.

147

141

View full text Add to dashboard Cite

show abstract

“…El sistema córtico-coclear es una compleja red neuronal que comienza en las neuronas piramidales de la capa V y VI de la corteza auditiva, luego proyecta por medio de dos vías principales, una hacia el cuerpo geniculado medial del tálamo y la otra al colículo inferior, complejo olivar superior y núcleos cocleares 56,57 . Posterior al trabajo de León y cols 58 se postula que la vía eferente que va de la corteza a la cóclea tiene al menos dos vías funcionales que regulan la sensibilidad coclear probablemente en procesos que requieren de atención selectiva 59 o el ciclo sueño vigilia 60 . Este tema ha sido recientemente revisado en un artículo de Terreros y cols (2013) que se recomienda leer a los interesados en el tema 56 .…”

Section: Vías Descendentes De La Corteza Auditivaunclassified

Avances en corteza auditiva

O¹,

R²

2014

Rev. Otorrinolaringol. Cir. Cabeza Cuello

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“…Este incluye dos circuitos, el primero se dirige al cuerpo geniculado medial del tálamo y el segundo a los colículos inferiores, complejo olivar superior y desde este núcleo a la cóclea 6,7 . Por otra parte, si bien el rol del sistema eferente auditivo en la audición es aún controversial, se postulan varias hipótesis como: (i) protección frente a sonidos de alta intensidad 8 ; (ii) efecto antienmascarador de estímulos auditivos en presencia de ruido de fondo 9 ; (iii) atención selectiva 10,11 y (iv) modulación de la sensibilidad coclear durante el ciclo de sueño y vigilia 12 . En el presente artículo se realiza una revisión enfocada en tres temas en los que se han realizado avances importantes en el entendimiento del sistema eferente auditivo en los últimos años: (i) Neurotransmisores de las sinapsis olivococleares; (ii) Fisiología del sistema cortico-coclear y (iii) Rol en clínica del sistema eferente auditivo.…”

Section: Introductionunclassified

Desde la corteza auditiva a la cóclea: Progresos en el sistema eferente auditivo

León

et al. 2013

Rev. Otorrinolaringol. Cir. Cabeza Cuello

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The auditory efferent system is composed by the olivocochlear fibers and descending projections that originate in the auditory cortex and end in the cochlea. The olivocochlear system is divided into a medial and lateral division, with fibers directed to the outer hair cells and to the auditory nerve fibers respectively. It is known that acetylcholine is the main neurotransmitter of the olivocochlear synapses and that outer hair cells and auditory nerve fibers have receptors to this molecule. The cortico-cochlear efferent system originates in layers V

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Correlative changes of auditory nerve and microphonic potentials throughout sleep

Cited by 41 publications

References 13 publications

Selective Attention to Visual Stimuli Reduces Cochlear Sensitivity in Chinchillas

Selective Attention to Visual Stimuli Reduces Cochlear Sensitivity in Chinchillas

Avances en corteza auditiva

Desde la corteza auditiva a la cóclea: Progresos en el sistema eferente auditivo

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