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Videos de Conceptos Relacionados

Auditory Pathway01:15

Auditory Pathway

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Auditory pathways constitute the complex neural circuits responsible for transmitting and interpreting auditory information from the peripheral auditory system to the brain. Sound waves are initially captured by the outer ear, funneled through the ear canal, and reach the tympanic membrane (eardrum). These vibrations are transmitted via the middle ear's ossicles to the inner ear's cochlea.
When viewed cross-sectionally, the cochlea reveals the scala vestibuli and scala tympani flanking...
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Hearing01:31

Hearing

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When we hear a sound, our nervous system is detecting sound waves—pressure waves of mechanical energy traveling through a medium. The frequency of the wave is perceived as pitch, while the amplitude is perceived as loudness.
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Encoding01:19

Encoding

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Information enters the brain through encoding, which is the input of information into the memory system. Once sensory information is received from the environment, the brain labels or codes it. The information is then organized with similar information and connected to existing concepts. Encoding occurs through automatic processing and effortful processing.
Automatic processing involves the encoding of details like time, space, frequency, and the meaning of words, usually done without conscious...
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Motor and Sensory Areas of the Cortex01:14

Motor and Sensory Areas of the Cortex

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The cerebral cortex, the brain's outermost layer, is pivotal in processing complex cognitive tasks, emotions, and various sensory inputs and executing voluntary motor activities. This intricate structure is divided into three primary functional areas: the motor areas, sensory areas, and association areas.
Motor Areas
The motor areas located in the frontal lobe are central to controlling voluntary movements. This region is further subdivided into the primary motor cortex and the premotor cortex....
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Association Areas of the Cortex01:21

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Association areas are regions of the cerebral cortex that do not have a specific sensory or motor function. Instead, they integrate and interpret information from various sources to enable higher cognitive processes such as memory, learning, and decision-making. Some key association areas include the following:
Prefrontal Association Area: This area is located in the frontal lobe and is involved in planning, decision-making, and moderating social behavior. It connects with primary motor areas,...
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Perceiving Loudness, Pitch, and Location01:21

Perceiving Loudness, Pitch, and Location

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The human brain perceives pitch through two primary mechanisms reflected in place theory and frequency theory. Each mechanism describes how sound waves are interpreted as specific pitches by the brain, offering insights into the intricate processes of auditory perception.
Place theory, or place coding, suggests that different pitches are heard because various sound waves activate specific locations along the cochlea's basilar membrane. The brain determines the pitch of a sound by...
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Video Experimental Relacionado

Updated: Sep 9, 2025

Combined Shuttle-Box Training with Electrophysiological Cortex Recording and Stimulation as a Tool to Study Perception and Learning
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Combined Shuttle-Box Training with Electrophysiological Cortex Recording and Stimulation as a Tool to Study Perception and Learning

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Codificación predictiva de las secuencias auditivas en la corteza prefrontal humana

Olgerta Asko1, Vegard A Volehaugen1, Anaïs Llorens2,3,4

  • 1RITMO Centre for Interdisciplinary Studies in Rhythm, Time and Motion, Department of Psychology, University of Oslo, 0373 Oslo, Norway.

bioRxiv : the preprint server for biology
|September 2, 2025
PubMed
Resumen
Este resumen es generado por máquina.

El cerebro usa distintas regiones de la corteza prefrontal para predecir los próximos sonidos. La corteza orbitofrontal inicia este proceso predictivo, mientras que la corteza prefrontal lateral lo refina, guiando el comportamiento.

Palabras clave:
Variación negativa contingente (VNC)El EEGActividad de banda ancha de alta frecuencia (HFBA)El SEEGanticipaciónpercepción auditivaDetección de desviacioneslas expectativaslesión del lóbulo frontalcorteza prefrontal lateralLa corteza orbitofrontalPronóstico

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Infant Auditory Processing and Event-related Brain Oscillations
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Last Updated: Sep 9, 2025

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Área de la Ciencia:

  • La neurociencia
  • Ciencias cognitivas
  • Percepción auditiva

Sus antecedentes:

  • La corteza prefrontal (PFC) es crucial para formar las expectativas ambientales para guiar el comportamiento.
  • Las funciones específicas de la corteza orbitofrontal (OFC) y la PFC lateral (LPFC) en el procesamiento predictivo no se comprenden completamente.

Objetivo del estudio:

  • Investigar las distintas contribuciones temporales de OFC y LPFC en el procesamiento predictivo auditivo.
  • Determinar las funciones causales de la OFC y la LPFC en la formación de la expectativa.

Principales métodos:

  • EEG intracraneal en pacientes con epilepsia durante una tarea de detección de desviaciones auditivas.
  • Análisis de la actividad neuronal y la conectividad funcional entre las subregiones prefrontales.
  • Evaluación de la sensibilidad a la expectativa después de las lesiones OFC o LPFC.

Principales resultados:

  • Se observó el compromiso de la corteza prefrontal, con una modulación de la expectativa más temprana en OFC y más tarde en LPFC.
  • Flujo de información bidireccional y asimétrico entre OFC y LPFC, iniciado por OFC.
  • Las lesiones OFC eliminaron la sensibilidad a la expectativa, mientras que las lesiones LPFC tuvieron un impacto mínimo.

Conclusiones:

  • OFC y LPFC exhiben roles distintos y organizados temporalmente en el procesamiento predictivo.
  • OFC juega un papel inicial en la codificación predictiva, mientras que LPFC refina la expectativa.
  • La evidencia electrofisiológica y causal apoya las funciones segregadas dentro de la corteza prefrontal para la expectativa.