人間の皮質表面積の階層的な遺伝的組織
Chi-Hua Chen1, E D Gutierrez, Wes Thompson
1Department of Psychiatry, University of California, San Diego, La Jolla, CA 92093, USA.
まとめ
科学者たちは,遺伝学を使って人間の脳皮質をマッピングし,脳の領域を明らかにしました. この遺伝子アトラスは,脳の領域の階層的かつモジュール的な組織を明らかにし,人間の脳の発達に関する新しい洞察を提供します.
科学分野:
- 神経科学は神経科学である.
- 人間の遺伝学 人間の遺伝学
- 脳のイメージング
背景:
- 皮質の表面積は高度に遺伝性があるが,その地域的差異化に対する遺伝的影響はほとんど不明である.
- 脳構造に対する遺伝的コントロールを理解することは,人間の脳の発達と進化の解読に不可欠です.
研究 の 目的:
- 人間の脳皮質の遺伝的に定義されたサブディビジョンを特定するために.
- 遺伝子データに基づく新しい人間の脳アトラスを作成する.
- 遺伝的に影響された皮質領域の組織原理を調査する.
主な方法:
- 406人の双子の磁気共鳴画像 (MRI) データを用いて,データ駆動のぼんやりとしたクラスタリング技術を利用した.
- 皮質の表面積を遺伝子的に異なる部分に分割する.
- 遺伝子情報に基づく人間の脳アトラスを開発した.
主要な成果:
- 大脳皮質の遺伝的サブディビジョンを特定し,その多くは既知の構造的および機能的領域と一致しています.
- 新しい現象型と,皮質領域の階層的でモジュール化された組織を発見した.
- 半球間の遺伝的組織において,主に双方向の対称性を示した.
- ヒト特有の領域は,より広範な遺伝子に基づくロバーパターン内のサブディビジョンであることを発見しました.
結論:
- この研究は,ヒトの脳皮質の新しい,遺伝的に派生したアトラスを提示しています.
- 皮質の表面積は,階層的,モジュール的,対称的な遺伝的組織を示しています.
- これらの発見は,ヒトの脳の微分化の遺伝的構造に関する新しい洞察を提供します.
関連する概念動画
Organization of the Brain
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Hindbrain
The hindbrain, located at the base of the brain, plays a vital role in regulating automatic processes that sustain life. It includes the medulla oblongata, which is essential for...
Hindbrain
The hindbrain, located at the base of the brain, plays a vital role in regulating automatic processes that sustain life. It includes the medulla oblongata, which is essential for...
Motor and Sensory Areas of the Cortex
The cerebral cortex, the brain's outermost layer, is pivotal in processing complex cognitive tasks, emotions, and various sensory inputs and executing voluntary motor activities. This intricate structure is divided into three primary functional areas: the motor areas, sensory areas, and association areas.
Motor Areas
The motor areas located in the frontal lobe are central to controlling voluntary movements. This region is further subdivided into the primary motor cortex and the premotor cortex.
Motor Areas
The motor areas located in the frontal lobe are central to controlling voluntary movements. This region is further subdivided into the primary motor cortex and the premotor cortex.
Somatosensory, Motor, and Association Cortex
The somatosensory cortex in the parietal lobes is crucial for interpreting sensory data such as touch, temperature, and proprioception. The somatosensory cortex, situated in the parietal lobes, plays a vital role in interpreting sensory information like touch, temperature, and proprioception—awareness of body position. This specialized brain region features an organized structure wherein neurons at the top primarily process sensations originating from the lower body. In contrast, those at the...
Cerebrum: Anatomical Overview II
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...
Association Areas of the Cortex
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,...
Lobes of the Cerebrum
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.


