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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

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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
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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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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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Somatosensory, Motor, and Association Cortex01:24

Somatosensory, Motor, and Association Cortex

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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...
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Role of Cerebellum and Prefrontal Cortex in Memory01:14

Role of Cerebellum and Prefrontal Cortex in Memory

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The cerebellum, while traditionally associated with motor control, also plays a crucial role in memory, particularly in procedural memory, which involves learning motor tasks that become automatic through repetition. For example, studies have shown that when the cerebellum is damaged, individuals or animals lose the ability to learn conditioned motor responses, such as the conditioned eye-blink response in classical conditioning experiments with rabbits. This study demonstrates the...
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Related Experiment Video

Updated: Jul 9, 2025

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

Published on: October 11, 2017

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Cingulate cortex facilitates auditory perception under challenging listening conditions.

Kelsey L Anbuhl, Marielisa Diez Castro, Nikki A Lee

    Biorxiv : the Preprint Server for Biology
    |November 28, 2023
    PubMed
    Summary
    This summary is machine-generated.

    Cognitive resources aid listening in difficult conditions. A gerbil study found a cingulate cortex to auditory cortex pathway enhances performance, especially in challenging listening scenarios.

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    Area of Science:

    • Neuroscience
    • Auditory Perception
    • Cognitive Neuroscience

    Background:

    • Challenging acoustic conditions increase listening effort, potentially causing fatigue and hindering language development.
    • The neural basis of listening effort and its top-down modulation of auditory processing remain unclear.
    • The cingulate cortex is implicated in processing difficult listening conditions.

    Purpose of the Study:

    • To investigate the role of the gerbil cingulate cortex (Cg) in auditory perception.
    • To determine if Cg projects to the auditory cortex (AC) and facilitates performance under challenging listening conditions.

    Main Methods:

    • Gerbils performed a sound discrimination task in 'Easy' and 'Hard' conditions (varying stimulus duration).
    • Anatomical tracing identified descending projections from Cg1 to the AC.
    • Inactivation of Cg1 or Cg-to-AC projections using muscimol or chemogenetics.

    Main Results:

    • Gerbils performed identically in Easy and Hard blocks.
    • A projection from Cg1 to the AC was confirmed.
    • Inactivating Cg1 or its projections specifically degraded performance in Hard blocks.

    Conclusions:

    • A descending pathway from the cingulate cortex to the auditory cortex supports auditory perception.
    • This pathway is crucial for maintaining performance under challenging listening conditions.
    • This circuit may be impaired in individuals with hearing loss.