半球在HVC中的统治性取决于青少年雄性斑马的经验
Sophia Y Frank1, Jesse L Hunt1, Andrea J Bae1
1Neuroscience Department, Wellesley College, Wellesley, MA, 02481, USA.
Scientific reports
|March 9, 2024
概括
斑马的歌曲学习需要早期接触成年导师. HVC (正名) 区域的侧面化发生在歌曲暴露后,而不是之前,这表明学习形成了大脑不对称.
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:
- 年轻雄性斑马的歌曲学习取决于在敏感时期接触成年导师.
- HVC (正名) 核对于歌曲的学习和制作至关重要,类似于人类的布罗卡区域.
- 人类语言区域显示左半球占主导地位,但这种不对称的起源 (学习与成熟) 尚不清楚.
研究的目的:
- 调查青少年雄性斑马在歌曲学习之前是否存在半球在HVC (正确名称) 中的主导地位.
- 为了确定早期的听觉暴露是否塑造了歌曲系统中的功能性大脑不对称性.
主要方法:
- 年轻的雄性斑马被孤立地从成年歌曲导师那里抚养起来.
- 在最初的听觉刺激暴露时,测量了左和右HVC (正确名称) 中的神经元活动.
- 直接早期基因 (IEG) (zif-268,egr-1,NGFI-a,krox-24) 表达被用作神经元活动的标记物.
主要成果:
- 在没有歌曲暴露的斑马雀中,HVC (正名) 中的神经元活动没有横向化.
- 正常养的幼鸟在HVC (正确名称) 中显示左主导基线分子活性.
- 这表明HVC (正确名称) 的功能不对称性不是先前存在的,而是暴露后发展的.
结论:
- 在未成年雄性斑马中,在歌曲暴露之前,HVC (正称) 没有固有的半球不对称性.
- 鸟类歌曲系统中的歌曲侧面化取决于学习,特别是早期接触成人歌曲和练习.
- 这些发现提供了对声学学习和大脑横向化的神经生物学基础的见解.
相关概念视频
01:28Lateralization
330
Brain lateralization refers to the division of mental processes and functions between the two hemispheres of the brain, a phenomenon that optimizes neural efficiency and underpins complex abilities in humans. This specialization allows each hemisphere to perform tasks where it has a comparative advantage, facilitating more refined cognitive capabilities across different domains.
330
01:20Mate Choice
8.0K
Mate choice—the decision about whom to mate with—is a type of natural selection, since animals must reproduce to pass down their genes. Mate choice is also called intersexual selection because the behavior occurs between the sexes.
8.0K
01:05Cerebral Hemispheres
330
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...
330
02:29Hybrid Zones
17.0K
Hybrid zones are narrow regions where two closely related species interact, mate, and produce hybrids. Relative to either parent species, hybrids may possess distinct phenotypic or genetic differences that impact their survival and reproductive success. The genetic variances introduced by hybridization influence species diversity and speciation processes within the hybrid zone.
17.0K