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相关概念视频

Biological Causes of Schizophrenia01:29

Biological Causes of Schizophrenia

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Schizophrenia, a severe psychiatric disorder, arises from a complex interplay of biological factors, including genetic predisposition, structural brain abnormalities, neurotransmitter dysregulation, and developmental irregularities. These factors collectively contribute to the onset and progression of the disorder, which typically manifests in late adolescence or early adulthood.
Genetic Factors in Schizophrenia
The genetic basis of schizophrenia is strongly supported by family and twin...
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Biological Influences on Intelligence01:30

Biological Influences on Intelligence

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Intelligence is often thought to be linked to brain size, but the relationship is more complex than that. While brain size does correlate modestly with some abilities, like verbal skills, the connection is weaker for others, such as spatial reasoning. Other factors, like brain structure, also play crucial roles. For instance, despite Einstein's smaller-than-average brain, his parietal cortex, which is involved in spatial reasoning, was 15% wider, suggesting that neural density might matter...
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Sex-linked Disorders01:43

Sex-linked Disorders

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Like autosomes, sex chromosomes contain a variety of genes necessary for normal body function. When a mutation in one of these genes results in biological deficits, the disorder is considered sex-linked.
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Genomic Imprinting and Inheritance02:30

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Diploid organisms inherit genetic material through chromosomes from both parents. Copies of the same gene are known as alleles. In most cases, both alleles are simultaneously expressed and allow various cellular processes to function optimally. If one of the alleles is missing or mutated, the expression of the other allele can compensate; however, this is not true for all genes.
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Alternative RNA Splicing02:18

Alternative RNA Splicing

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Alternative RNA splicing is the regulated splicing of exons and introns to produce different mature mRNAs from a single pre-mRNA. Unlike in constitutive splicing where a single gene produces a single type of mRNA, alternative splicing allows an organism to produce multiple proteins from a single gene and plays an important role in protein diversity.
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相关实验视频

Updated: Jun 29, 2025

Symmetric Bihemispheric Postmortem Brain Cutting to Study Healthy and Pathological Brain Conditions in Humans
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使用罕见的遗传突变重新审视结构性大脑不对称性.

Jakub Kopal1,2, Kuldeep Kumar3, Kimia Shafighi1,2

  • 1Mila - Québec Artificial Intelligence Institute, Montréal, QC, Canada.

Nature communications
|March 27, 2024
PubMed
概括

罕见的遗传删除和重复显著影响大脑不对称性,影响语言和面部识别等功能. 这项研究揭示了特定的基因组如何影响大脑侧向化和人类认知.

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A Novel Strategy Combining Array-CGH, Whole-exome Sequencing and In Utero Electroporation in Rodents to Identify Causative Genes for Brain Malformations
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科学领域:

  • 神经遗传学 神经遗传学
  • 认知神经科学 认知神经科学
  • 人类遗传学 人类遗传学

背景情况:

  • 大脑组织具有半球不对称性,这对于语言和面部识别等高级认知功能至关重要.
  • 以前关于大脑不对称性的遗传研究主要使用了具有轻微影响的常见变体.
  • 罕见的基因组删除和重复提供了一个强大的工具来调查对大脑结构和功能的遗传影响.

研究的目的:

  • 解剖高效果大小拷贝数变异 (CNVs) 对人类大脑不对称性的影响.
  • 探索遗传变化,大脑横向化和行为之间的关系.
  • 识别影响大脑不对称性和认知功能的特定基因组.

主要方法:

  • 采用一种模式学习方法来分析大队伍中的大脑不对称性.
  • 包括552个复制号变异 (CNV) 载体和290个多个站点的非载体.
  • 利用全基因组关联研究 (GWAS) 对常见变异进行有针对性的分析.

主要成果:

  • 确定了多变量大脑不对称模式,突出了参与横向功能 (语言,听觉,视觉,面部,词识别) 的区域.
  • 平面时间不对称性对特定基因组的删除和重复特别敏感.
  • 对右与左平面时结构的遗传影响有部分分歧.

结论:

  • 遗传控制的大脑侧面化对人类独特的认知能力有重大影响.
  • 罕见的基因组变异为大脑不对称性的遗传结构提供了洞察力.
  • 基因-大脑-行为数据融合揭示了横向化在认知中的作用.