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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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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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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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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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Association Areas of the Cortex01:21

Association Areas of the Cortex

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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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Updated: Jan 8, 2026

Stereotactically-guided Ablation of the Rat Auditory Cortex, and Localization of the Lesion in the Brain
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Aging in the Primary Auditory Cortex.

Jonah K Mittelstadt1,2,3, Kelson V Shilling-Scrivo2,4, Patrick O Kanold5,6,7,8

  • 1Department of Biomedical Engineering, Johns Hopkins University, Baltimore, MD, 21205, USA.

Journal of the Association for Research in Otolaryngology : JARO
|December 13, 2025
PubMed
Summary
This summary is machine-generated.

Aging impairs hearing by affecting the auditory cortex, not just the ear. This review explores how brain changes, influenced by sex and environment, impact sound processing and suggest new rehabilitation strategies.

Keywords:
AgingAuditory cortexNeuroplasticitySex-effectTraining

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Area of Science:

  • Neuroscience
  • Auditory Neuroscience
  • Gerontology

Background:

  • Age-related auditory dysfunction impacts millions, often attributed to cochlear issues.
  • Emerging evidence highlights the primary auditory cortex as a significant contributor to age-related hearing loss.
  • Understanding these cortical changes is crucial for developing effective interventions.

Purpose of the Study:

  • To review current literature on aging effects in the primary auditory cortex across species.
  • To propose a unified mechanism for auditory cortical aging.
  • To emphasize the need to consider sex as a biological variable in auditory aging research.

Main Methods:

  • Literature review of studies on auditory cortex aging in humans, non-human primates, and rodents.
  • Analysis of research examining spectral and temporal sound processing deficits.
  • Synthesis of findings related to neural circuit restructuring and inhibitory function loss.

Main Results:

  • Aging leads to auditory cortical dysfunction, characterized by impaired spectral and temporal sound processing.
  • These deficits stem from reduced neural inhibition and significant restructuring of cortical circuits.
  • Auditory cortex aging is sex-dependent, a variable often overlooked in studies.

Conclusions:

  • A complex interplay between excitatory and inhibitory neurons underlies auditory cortical aging.
  • Factors like higher-order cortical input, neuromodulators, and sensory environment modify this process.
  • Future research and rehabilitation strategies must adopt a sex-specific approach to auditory aging.