鳥の鳴き声と演奏の基礎にある神経動力学
Jonnathan Singh Alvarado1, Jack Goffinet2, Valerie Michael1
1Department of Neurobiology, Duke University, Durham, NC, USA.
Nature
|October 21, 2021
まとめ
ゼブラ・フィンチ
科学分野:
- 神経科学
- 動物 の 行動
- バイオアコースティック
背景:
- 音楽やアスリートのような 複雑な運動能力は 信頼性の高いパフォーマンスのために 練習が必要です
- 男性のゼブラフィンは 練習中に歌の変性を表し 演奏中にステレオタイプ性を表します
- 複雑な行動において 運動の多様性の神経メカニズムを理解することは 極めて重要です
研究 の 目的:
- ベースリンパ節の脊髄神経細胞 (SN) の神経活動が,歌の練習と演奏の間に運動の変動性をどのようにコードし,制御するかを調査する.
- 声の探求とステレオタイプにおけるSNの役割を特定する.
- ノラドレナジック信号が声の変動に及ぼす影響を決定する.
主な方法:
- カルシウムイメージングは,歌の練習や演奏中に棘状ニューロン (SN) のエンサンブルにおける活動を記録します.
- 練習中にSNの活動を操作する.
- SN活動パターンと曲の変数を分析するための無監督学習方法.
- SN活動と発声に対するノラドレナージ信号効果の調査.
主要な成果:
- SNカルシウム信号は,皮質の入力と比較して,歌の練習中に非常に変動します.
- SNカルシウム信号は女性による歌の演奏中に抑制されます.
- 練習中のSNのオプトジェネティック抑制は,声の変動性を大幅に減少させます.
- 特定のSNの活動パターンは,異なる歌の練習変数と相関しています.
- ノラドレナジックシグナル伝達は,SNの活動を直接抑制し,声の変動性を減少させます.
結論:
- 基礎帯のSNは 練習中に声の探求をコードし 駆動する.
- ステレオタイプで正確な歌のパフォーマンスを促進します.
- この研究は 学習された発声における 運動の変動を制御する 神経的メカニズムを明らかにしています
関連する概念動画
01:21Perceiving Loudness, Pitch, and Location
539
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...
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...
539
01:17Auditory Perception
662
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...
662
01:31Hearing
54.0K
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.
54.0K
01:13The Cochlea
47.3K
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.
47.3K
01:01Perception of Sound Waves
4.8K
The human ear is not equally sensitive to all frequencies in the audible range. It may perceive sound waves with the same pressure but different frequencies as having different loudness. Moreover, the perception of sound waves depends on the health of an individual's ears, which decays with age. The health of one's ears may also be affected by regular exposure to loud noises.
The pitch of a sound depends on the frequency and the pressure amplitude of the source. Two sounds of the same...
The pitch of a sound depends on the frequency and the pressure amplitude of the source. Two sounds of the same...
4.8K
01:37Neural Regulation
40.5K
Digestion begins with a cephalic phase that prepares the digestive system to receive food. When our brain processes visual or olfactory information about food, it triggers impulses in the cranial nerves innervating the salivary glands and stomach to prepare for food.
40.5K