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Related Concept Videos

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.
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 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...
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...
Association Areas of the Cortex01:21

Association Areas of the Cortex

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,...
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.

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Related Experiment Video

Updated: May 19, 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

Auditory imagery modulates frequency-specific areas in the human auditory cortex.

Jihoon Oh1, Jae Hyung Kwon, Po Song Yang

  • 1The Catholic University of Korea, Korea.

Journal of Cognitive Neuroscience
|August 22, 2012
PubMed
Summary
This summary is machine-generated.

Mental auditory imagery activates the primary auditory cortex (PAC) in frequency-specific ways. This demonstrates top-down processing in the auditory system, similar to the visual system.

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Last Updated: May 19, 2026

Functional Imaging of Auditory Cortex in Adult Cats using High-field fMRI
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Published on: February 19, 2014

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Published on: September 12, 2012

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09:29

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

Published on: October 11, 2017

Area of Science:

  • Neuroscience
  • Auditory Neuroscience
  • Cognitive Neuroscience

Background:

  • Top-down processing influences neural responses in early sensory areas.
  • Early visual areas show topographical top-down processing.
  • Functional evidence for topographic auditory cortex modulation is limited.

Purpose of the Study:

  • To investigate top-down processing in the auditory cortex.
  • To examine topographic modulation within the primary auditory cortex (PAC) during mental auditory imagery.
  • To compare auditory cortex modulation with mechanisms in early visual systems.

Main Methods:

  • Utilized functional magnetic resonance imaging (fMRI) to measure brain activity.
  • Instructed participants in mental auditory imagery of familiar melodies (high- and low-frequency).
  • Analyzed activation patterns in frequency-responsive areas of the PAC.

Main Results:

  • Mental auditory imagery induced significant activation in the PAC.
  • Imagery of high-frequency melodies increased activation in high-frequency areas, and vice versa.
  • Primary auditory area A1 showed stronger frequency-related modulation than R.

Conclusions:

  • The auditory cortex exhibits top-down processing.
  • This processing relies on frequency-specific topographic mechanisms within the PAC.
  • Auditory top-down processing parallels mechanisms found in early visual systems.