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Related Concept Videos

Auditory Pathway01:15

Auditory Pathway

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 the...
Hearing01:31

Hearing

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.
Auditory Perception01:17

Auditory Perception

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 cochlea, a...
Perceiving Loudness, Pitch, and Location01:21

Perceiving Loudness, Pitch, and Location

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 identifying...
The Cochlea01:13

The Cochlea

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.
Motor and Sensory Areas of the Cortex01:14

Motor and Sensory Areas of the Cortex

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: May 22, 2026

Stereotactically-guided Ablation of the Rat Auditory Cortex, and Localization of the Lesion in the Brain
09:29

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Published on: October 11, 2017

A corticostriatal neural system enhances auditory perception through temporal context processing.

Eveline Geiser1, Michael Notter, John D E Gabrieli

  • 1Department of Brain and Cognitive Sciences, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA. egeiser@mit.edu

The Journal of Neuroscience : the Official Journal of the Society for Neuroscience
|May 4, 2012
PubMed
Summary
This summary is machine-generated.

Regular sound patterns enhance auditory perception by engaging the putamen, a brain region that facilitates processing in the auditory cortex. This corticostriatal system improves how we perceive sound based on temporal regularity.

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Area of Science:

  • Neuroscience
  • Auditory Perception
  • Cognitive Science

Background:

  • Auditory perception is significantly influenced by the temporal context of acoustic signals.
  • Understanding the neural mechanisms of perceptual facilitation by temporal regularity is crucial.

Purpose of the Study:

  • To investigate the neural correlates of perceptual facilitation by regular temporal contexts in humans.
  • To explore the role of the putamen and auditory cortex in processing temporal regularity.

Main Methods:

  • Functional magnetic resonance imaging (fMRI) was used to measure brain activity.
  • Participants performed an intensity discrimination task with periodic and nonperiodic tone sequences.
  • Behavioral performance and brain activation patterns were analyzed.

Main Results:

  • Participants showed improved intensity discrimination with periodic compared to nonperiodic tone sequences.
  • Greater activation was observed in the putamen for periodic sequences.
  • Increased activation in auditory cortices (planum polare, planum temporale) was found for nonperiodic sequences.
  • A negative correlation was found between putamen activation and auditory cortical activation.

Conclusions:

  • The putamen detects temporal regularity in auditory stimuli.
  • This detection facilitates auditory cortical processing, leading to enhanced perception.
  • A corticostriatal system underlies contextual facilitation in auditory perception through temporal regularity processing.