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Related Concept Videos

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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The Cochlea01:13

The Cochlea

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The cochlea is a coiled structure in the inner ear that contains hair cells—the sensory receptors of the auditory system. Sound waves are transmitted to the cochlea by small bones attached to the eardrum called the ossicles, which vibrate the oval window that leads to the inner ear. This causes fluid in the chambers of the cochlea to move, vibrating the basilar membrane.
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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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Auditory Perception01:17

Auditory Perception

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The auditory system is essential for sound perception, utilizing various critical structures. When sound waves enter the outer ear, they travel through the ear canal and cause the eardrum to vibrate. These vibrations are then transmitted to the middle ear, where three tiny bones – the malleus, incus, and stapes – amplify the sound. This amplification is crucial, as it ensures that the sound vibrations are strong enough to be conveyed to the inner ear. These vibrations then reach the...
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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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Related Experiment Video

Updated: Feb 25, 2026

Combined Shuttle-Box Training with Electrophysiological Cortex Recording and Stimulation as a Tool to Study Perception and Learning
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Great Expectations: Is there Evidence for Predictive Coding in Auditory Cortex?

Micha Heilbron1, Maria Chait2

  • 1Département de Biologie, École Normale Supérieure, Paris 75005, France; Université Pierre et Marie Curie P6, Paris 75005, France.

Neuroscience
|August 8, 2017
PubMed
Summary
This summary is machine-generated.

Predictive coding theory in auditory processing shows strong evidence for expectations but lacks proof for specific neurons. Further research is needed to validate its core assumptions.

Keywords:
MMNSSAauditorybayesian brainpredictive coding

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Area of Science:

  • Neuroscience
  • Auditory Neuroscience
  • Computational Neuroscience

Background:

  • Predictive coding is a prominent yet controversial theory of neural function.
  • Its explanatory power is praised, but key tenets remain untested or untestable.
  • This review focuses on empirical evidence for predictive coding within the auditory system.

Purpose of the Study:

  • To critically evaluate existing evidence for predictive coding in the auditory modality.
  • To examine five key assumptions of predictive coding theory using animal, human, and modeling studies.
  • To identify areas requiring further investigation to validate the theory.

Main Methods:

  • Literature review of animal, human, and computational modeling studies on auditory pattern processing.
  • Analysis of evidence supporting or refuting five core assumptions of predictive coding.
  • Evaluation of studies on neural responses, hierarchical organization, stimulus omission, neuronal specialization, oscillatory signatures, and attention-precision.

Main Results:

  • Compelling evidence supports that neural responses are shaped by hierarchical expectations in auditory processing.
  • Empirical support exists for the anticipatory nature of these expectations, particularly in response to omitted stimuli.
  • Evidence is lacking for separate error and prediction neurons; results on oscillatory signatures and attention-precision are mixed or contradictory.

Conclusions:

  • While predictive coding is supported by evidence regarding expectation formation, critical assumptions remain unsubstantiated.
  • Further collaborative research integrating human, animal, and modeling approaches is essential.
  • More work is needed to rigorously test and validate the core tenets of predictive coding in the auditory system.