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Related Concept Videos

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.
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.
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...
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.
Somatosensory, Motor, and Association Cortex01:23

Somatosensory, Motor, and Association Cortex

The somatosensory cortex in the parietal lobes is crucial for interpreting sensory data such as touch, temperature, and proprioception. The somatosensory cortex, situated in the parietal lobes, plays a vital role in interpreting sensory information like touch, temperature, and proprioception—awareness of body position. This specialized brain region features an organized structure wherein neurons at the top primarily process sensations originating from the lower body. In contrast, those at the...

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Related Experiment Video

Updated: May 11, 2026

Functional Imaging of Auditory Cortex in Adult Cats using High-field fMRI
10:50

Functional Imaging of Auditory Cortex in Adult Cats using High-field fMRI

Published on: February 19, 2014

Mapping tonotopy in human auditory cortex.

Pim van Dijk1, Dave R M Langers

  • 1Department of Otorhinolaryngology, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands.

Advances in Experimental Medicine and Biology
|May 30, 2013
PubMed
Summary
This summary is machine-generated.

This study reveals multiple tonotopic maps in the human auditory cortex, challenging previous models. Tinnitus patients showed no large-scale tonotopic reorganization, suggesting new avenues for auditory processing research.

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Slicing the Embryonic Chicken Auditory Brainstem to Evaluate Tonotopic Gradients and Microcircuits
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Slicing the Embryonic Chicken Auditory Brainstem to Evaluate Tonotopic Gradients and Microcircuits

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Last Updated: May 11, 2026

Functional Imaging of Auditory Cortex in Adult Cats using High-field fMRI
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Multiscale Investigations of Cortical Processing by Integrating Laminar Polytrodes and Optogenetics with Micro Electrocorticography in Rodents
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Slicing the Embryonic Chicken Auditory Brainstem to Evaluate Tonotopic Gradients and Microcircuits
08:24

Slicing the Embryonic Chicken Auditory Brainstem to Evaluate Tonotopic Gradients and Microcircuits

Published on: July 12, 2022

Area of Science:

  • Neuroscience
  • Auditory Neuroscience
  • Neuroimaging

Background:

  • Tonotopy is a key organizational principle in the auditory pathway.
  • The precise arrangement of human tonotopic maps remains under investigation.

Purpose of the Study:

  • To identify and delineate multiple tonotopic maps in the human auditory cortex using neuroimaging.
  • To investigate the tonotopic organization in tinnitus patients and compare it with healthy individuals.

Main Methods:

  • Utilized advanced neuroimaging techniques to map tonotopic gradients in the auditory cortex.
  • Applied the developed mapping method to analyze auditory cortex organization in tinnitus patients.

Main Results:

  • Identified multiple, diagonally oriented tonotopic maps on the anterior and posterior banks of Heschl's gyrus, not collinear as previously suggested.
  • Demarcated distinct auditory cortex subdivisions based on tonotopic gradient direction, showing potential homologies with primate auditory cortex.
  • Found no evidence of large-scale tonotopic reorganization in tinnitus patients, contradicting some existing pathophysiological models.

Conclusions:

  • The human auditory cortex contains multiple tonotopic maps with a distinct diagonal organization.
  • The findings provide a refined understanding of auditory cortex subdivisions and their evolutionary conservation.
  • The study suggests that tinnitus may not involve widespread tonotopic map alterations, offering new perspectives on its pathophysiology.