语言的新皮层基础设施涉及区域特定的层状基因表达模式
Maggie M K Wong1, Zhiqiang Sha1, Lukas Lütje1
1Language & Genetics Department, Max Planck Institute for Psycholinguistics, Nijmegen 6525XD, The Netherlands.
概括
研究人员在人类大脑语言网络的不同层次中确定了特定的基因表达模式. 这些遗传差异与大脑连接和神经疾病 (如阅读障碍和精神分裂症) 有关.
科学领域:
- 神经科学是一个神经科学.
- 基因组学就是基因组学.
- 分子生物学分子生物学
背景情况:
- 人类大脑的语言网络涉及下额叶和皮质,通常是左半球占主导地位.
- 了解这个网络中的功能专业化和互连性的分子基础至关重要.
- 皮层连接表现出特定层次的组织.
研究的目的:
- 调查前额和部语言区域之间的层特异性基因表达差异.
- 在语言网络中识别具有明显层状表达特征的基因.
- 探索这些基因与大脑连接和语言相关疾病的关联.
主要方法:
- 空间转录学被用于来自语言网络区域的死后人类皮质组织.
- 基因表达数据在皮层层进行了分析.
- 与单细胞表达数据的整合确定了差异表达的基因.
- 对已识别的基因进行了全基因组关联研究 (GWAS).
主要成果:
- 56个基因显示了前额和时语言皮层之间的差异性层状表达,在特定刺激神经元层 (II/III和/或V/VI) 上调.
- 这些56个基因中的DNA变异与前额和部语言区域之间的结构连接的变化有关.
- 这些遗传变异也显示出与阅读障碍和精神分裂症的关联,这些疾病通常会影响语言.
结论:
- 层状基因表达的特定区域模式是人类大脑语言网络的特征.
- 这些发现突出了语言处理功能组织的分子基础.
- 这些已识别的基因为理解和治疗与语言相关的神经疾病提供了潜在的目标.
相关概念视频
01:10Higher Mental Functions of the Brain: Language
775
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...
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...
775
01:28Lateralization
318
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.
318
01:27Language and Cognition
340
Language serves as a bridge between ideas and communication, influencing how individuals perceive and interact with the world. Psychologists have long debated whether language shapes thought or vice versa. This discussion gained grip with Edward Sapir and Benjamin Lee Whorf in the 1940s, who proposed that language determines thought, a concept known as linguistic determinism. They suggested that the vocabulary and structure of a language influence how its speakers think and perceive reality.
340
01:22Lobes of the Cerebrum
598
The cerebral cortex, a critical structure of the brain, is intricately divided into two hemispheres, each consisting of four distinct lobes: occipital, temporal, frontal, and parietal. These lobes function cooperatively to regulate various cognitive and sensory functions, forming the basis of our complex neural capabilities.
Frontal lobe
The frontal lobes, located behind the forehead, are the command center of our brain, controlling personality, intelligence, and voluntary muscle movements....
Frontal lobe
The frontal lobes, located behind the forehead, are the command center of our brain, controlling personality, intelligence, and voluntary muscle movements....
598
01:11Cerebrum: Anatomical Overview II
1.6K
Each cerebral hemisphere can be divided into three main regions. The outermost region, the cerebral cortex, is a thin layer (2 to 4 millimeters thick) made up of gray matter, consisting of neuron cell bodies, dendrites, glial cells, and blood vessels. The middle region, or white matter, is primarily composed of myelinated nerve fibers organized into three types of large tracts: association fibers, commissures, and projection fibers. Association fibers connect different areas within the same...
1.6K
01:21Association Areas of the Cortex
5.2K
Association areas are regions of the cerebral cortex that do not have a specific sensory or motor function. Instead, they integrate and interpret information from various sources to enable higher cognitive processes such as memory, learning, and decision-making. Some key association areas include the following:
Prefrontal Association Area: This area is located in the frontal lobe and is involved in planning, decision-making, and moderating social behavior. It connects with primary motor areas,...
Prefrontal Association Area: This area is located in the frontal lobe and is involved in planning, decision-making, and moderating social behavior. It connects with primary motor areas,...
5.2K