歌鸟声回路的损伤增加了歌曲语法变化的可能性
Avani Koparkar1, Timothy L Warren2,3, Jonathan D Charlesworth2
1Neurobiology of Vocal Communication, Institute for Neurobiology, University of Tübingen, Tübingen, Germany.
eLife
|April 18, 2024
概括
在歌鸟中,前侧 (mMAN) 的中间巨细胞核对于排序声元素至关重要. 对mMAN的损伤破坏了歌曲结构,影响了音节顺序和可变性.
科学领域:
- 神经科学是一个神经科学.
- 动物行为 动物行为
- 生物声学是一种生物声学.
背景情况:
- 语言和舞蹈等复杂的行为涉及有序的动作序列.
- 行动序列的基础的神经机制,特别是语法顺序,仍然在很大程度上是未知的.
- 鸟,一种学习的发音,表现出复杂的语法,并由像HVC (正名) 这样的大脑区域控制.
研究的目的:
- 为了研究前部阴道 (mMAN) 的中间巨细胞核的作用,这是HVC的反复输入,在语音测序中.
- 为了确定mMAN是否影响成年男性孟加拉语鸟歌曲中音节的语法顺序.
- 了解反复投影对HVC在控制动作序列中的贡献.
主要方法:
- 在成年雄性孟加拉 (Lonchura striata domestica) 的mMAN上进行了双边病变.
- 对鸟歌进行了声学分析,以评估音节结构,序列模式 (碎片,分支点,重复短语) 和可变性.
- 在mMAN病变之前和之后的歌曲结构和序列的比较.
主要成果:
- 双边mMAN病变没有显著改变单个音节的声学结构.
- 病变导致歌曲序列的变化增加,包括刻板印象的音节断片的断裂.
- 分支点的不确定性和重复短语长度的变化也在损伤后增加.
结论:
- 在孟加拉语鸟歌曲中,mMAN在声音元素的可变序列中发挥着重要作用.
- 对HVC的反复投射对于保持学习的发音的语法结构很重要.
- 具有复杂歌曲语法的歌鸟可以作为研究有序动作序列的神经控制的宝贵模型.
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