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関連する概念動画

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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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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Parallel Processing01:20

Parallel Processing

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The brain processes sensory information rapidly due to parallel processing, which involves sending data across multiple neural pathways at the same time. This method allows the brain to manage various sensory qualities, such as shapes, colors, movements, and locations, all concurrently. For instance, when observing a forest landscape, the brain simultaneously processes the movement of leaves, the shapes of trees, the depth between them, and the various shades of green. This enables a quick and...
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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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Cerebral Hemispheres01:05

Cerebral Hemispheres

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The human brain, a complex organ, is functionally divided into two cerebral hemispheres—left and right. These hemispheres are interconnected by a structure of paramount importance, the corpus callosum. This substantial bundle of neural fibers is not just a bridge between the hemispheres but a crucial element for the brain's comprehensive functioning. It enables efficient communication between the two hemispheres, allowing each side of the brain to control and receive sensory and motor...
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Perceiving Loudness, Pitch, and Location01:21

Perceiving Loudness, Pitch, and Location

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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...
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Multiscale Investigations of Cortical Processing by Integrating Laminar Polytrodes and Optogenetics with Micro Electrocorticography in Rodents
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人間の聴覚皮質全体に並行して分布した言語のエンコーディング

Liberty S Hamilton1, Yulia Oganian1, Jeffery Hall2

  • 1Department of Neurological Surgery, University of California, San Francisco, 675 Nelson Rising Lane, San Francisco, CA 94158, USA.

Cell
|August 19, 2021
PubMed
まとめ
この要約は機械生成です。

人間の聴覚皮質は 言語を並列的に処理します 連続的な階層ではなく 主要な聴覚皮質の刺激が 幻覚を引き起こしますが 主要でない領域は 言語の知覚に不可欠です

キーワード:
ヘシュルの回転聴覚皮質皮質刺激エレクトロコルチコグラフィー頭蓋内記録スピーチ上側側頭蓋骨

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Combined Shuttle-Box Training with Electrophysiological Cortex Recording and Stimulation as a Tool to Study Perception and Learning
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Mapping Cortical Dynamics Using Simultaneous MEG/EEG and Anatomically-constrained Minimum-norm Estimates: an Auditory Attention Example
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科学分野:

  • 神経科学
  • 聴覚神経科学
  • 言語の知覚

背景:

  • 伝統的見解では 音声信号を言語表現に変換する 連続的な前向きな皮質経路を想定しています
  • この階層的なモデルは 聴覚情報の連続した処理を 異なる皮質領域を通して示唆しています

研究 の 目的:

  • 言語処理における人間の聴覚皮質の組織原理を調査する.
  • 聴覚皮質の処理が 連続的な階層的なモデルに従っているか,または並行的に分散した組織であるかを判断する.

主な方法:

  • 人間の聴覚皮質の内側からの録音です
  • 主要および非主要の聴覚皮質領域の電気皮質刺激 (ECS)
  • 主要な聴覚皮質を標的とした 手術による切除試験

主要な成果:

  • 応答の遅延と受容フィールドの分析は,原始的および非原始的な聴覚皮質で並行して異なる情報処理ストリームを明らかにしました.
  • 主要な聴覚皮質の刺激は 音声知覚に影響を及ぼさず 聴覚幻覚を誘発します
  • 上側側頭葉の非主聴覚皮質の刺激は反対の効果があり,その切除は言語の知覚を損ねませんでした.

結論:

  • 人間の聴覚皮質は 情報を並行して処理する 分散した機能的組織を示し 連続的な階層モデルに 異議を唱えます
  • 非主聴覚皮質は,主聴覚皮質とは異なり,言語処理において不可欠で独立した役割を果たします.