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関連する概念動画

Hearing01:31

Hearing

57.8K
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.
57.8K
Auditory Pathway01:15

Auditory Pathway

7.6K
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...
7.6K
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.
51.6K
Perceiving Loudness, Pitch, and Location01:21

Perceiving Loudness, Pitch, and Location

1.1K
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...
1.1K
Auditory Perception01:17

Auditory Perception

1.3K
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...
1.3K
Higher Mental Functions of the Brain: Language01:10

Higher Mental Functions of the Brain: Language

3.9K
Language is a system of communication that allows the expression of thoughts, ideas, and feelings. The brain processes language in both hemispheres.
Language formation and comprehension take place in the dominant hemisphere. The dominant hemisphere is responsible for understanding the meaning of spoken, written, or sign language, as well as the ability to communicate. For most people, the left hemisphere is the dominant one. The right hemisphere, then, gives tone and emotional context to the...
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Author Spotlight: Investigating Vocal Information Representation in Small Primates and Its Alteration by Psychiatric Disorders Using Noninvasive EEG
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人間の聴覚皮質における音声プロソディエンコーディング

C Tang1, L S Hamilton1, E F Chang2

  • 1Department of Neurological Surgery and Weill Institute for Neurosciences, University of California, San Francisco, CA 94143, USA.

Science (New York, N.Y.)
|August 26, 2017
PubMed
まとめ
この要約は機械生成です。

科学者は 脳が 音の濃度ではなく 音の相対的な高さに 焦点を当てて 発音の輪郭を 処理することを発見しました この脳活動は上側側頭蓋骨で起こります

さらに関連する動画

Combined Shuttle-Box Training with Electrophysiological Cortex Recording and Stimulation as a Tool to Study Perception and Learning
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Functional Imaging of Auditory Cortex in Adult Cats using High-field fMRI
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関連する実験動画

Last Updated: Feb 24, 2026

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07:52

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

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科学分野:

  • 神経科学
  • 言語学
  • 聴覚的知覚

背景:

  • 人間の言語で言語的な意味を伝えるには 音調のピッチが重要です
  • 聴衆は,個々の声の範囲に関係なく,相対的なピッチに基づいて音調の輪郭を認識します.
  • 聴覚知覚の解読には 音声処理の神経的な基礎を理解することが重要です

研究 の 目的:

  • 人間の脳における音高の神経表現を調査する.
  • 脳が 絶対音量か 相対音量かを 判別する
  • 音声の輪郭を処理する脳の領域を 音声の内容と話し手のアイデンティティから 切り離してマッピングする

主な方法:

  • 高密度電気皮質撮影 (ECoG) を用いて,脳表面からの神経活動を記録した.
  • 参加者は 音調の輪郭や 音声の内容や 話し手のアイデンティティを 操作した文章を聞きました
  • 聴覚機能の選択的なエンコーディングのための上側側頭葉回 (STG) の皮質活動を分析した.

主要な成果:

  • 人間の上側側頭葉の特定の電極は 選択的に音調の輪郭を表現した.
  • 音声的な特徴やスピーカーのアイデンティティを 暗号化する場所とは 異なるものでした
  • 音調の輪郭のニューラル表現は 絶対的な音程ではなく 相対的な音程を反映し スピーカーによる正常化された処理を 確認した.

結論:

  • 人間の脳は,特に上側側頭蓋骨は, 音声の輪郭を処理するための 異なる神経集団を持っています.
  • イントネーション処理は相対的な音高変化のエンコーディングに依存し,スピーカーから独立した知覚を可能にします.
  • この発見は 脳が 複雑な言語情報を 発音から解読する方法の理解を 進めているのです