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Organization of the Brain01:30

Organization of the Brain

The brain is an integral component of the nervous system and serves as the center for processing sensory inputs, making decisions, and directing bodily actions. This complex organ is organized into three primary sections: the hindbrain, midbrain, and forebrain, each responsible for a range of vital functions.
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Cerebrum: Anatomical Overview I01:26

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The main and largest component of the human brain is the cerebrum. The cerebrum consists of two main parts: the cerebral cortex, an outer layer with wrinkles or folds known as gyri and shallow grooves called sulci, and a deeper region beneath it. The cerebrum divides into two distinct hemispheres and contains five different lobes: the frontal, parietal, temporal, occipital, and insula. The central sulcus separates the frontal and parietal lobes and two functionally important gyri — the...
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Lobes of the Cerebrum01:22

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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.
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Association Areas of the Cortex01:21

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Electroporation of Sliced Human Cortical Organoids for Studies of Gene Function
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Desarrollo y evolución del neocórtex humano.

Jan H Lui1, David V Hansen, Arnold R Kriegstein

  • 1Eli and Edythe Broad Center of Regeneration Medicine and Stem Cell Research, University of California, San Francisco, 35 Medical Center Way, San Francisco, CA 94143, USA.

Cell
|July 7, 2011
PubMed
Resumen
Este resumen es generado por máquina.

El tamaño del cerebro y el desarrollo del neocórtex giratorio son claves para la inteligencia. La zona subventricular externa (OSVZ) impulsa la expansión de la neocórtex al aumentar el número de neuronas y guiar la migración, ofreciendo conocimientos evolutivos.

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Ex utero Electroporation and Whole Hemisphere Explants: A Simple Experimental Method for Studies of Early Cortical Development

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Área de la Ciencia:

  • La neurociencia es la neurociencia.
  • Biología del desarrollo Biología del desarrollo.
  • Biología evolutiva Biología evolutiva.

Sus antecedentes:

  • El tamaño y la superficie del cerebro de los mamíferos se correlacionan con la capacidad intelectual.
  • La girificación neocortical, un sello distintivo de la función cognitiva superior, es crucial para expandir la capacidad cerebral.
  • La zona subventricular externa (ZOSV) es un nicho proliferativo clave en el neocórtex en desarrollo de los mamíferos.

Objetivo del estudio:

  • Explorar el papel de la zona subventricular externa (ZOSV) en el desarrollo neocortical.
  • Para entender cómo la proliferación celular OSVZ contribuye a la expansión de la neocórtex y el número de neuronas.
  • Para investigar los orígenes evolutivos del desarrollo neocortical mediado por OSVZ.

Principales métodos:

  • Revisión de estudios recientes sobre el desarrollo neocortical y los linajes celulares.
  • Análisis de la proliferación celular dentro de la OSVZ.
  • Análisis comparativo entre especies de mamíferos y reguladores moleculares en ratones.

Principales resultados:

  • El OSVZ alberga un linaje de células madre neurales y células amplificadoras de tránsito cruciales para la expansión de la neocórtex.
  • La proliferación en la OSVZ aumenta el número de neuronas e influye en las rutas de migración de las neuronas en desarrollo.
  • Los reguladores moleculares específicos en el neocórtex del ratón proporcionan información sobre los mecanismos de desarrollo conservados.

Conclusiones:

  • El OSVZ juega un papel crítico en la generación de la población neuronal expandida requerida para un neocórtex grande y giratorio.
  • La comprensión de la función OSVZ arroja luz sobre la trayectoria evolutiva de los cerebros complejos de los mamíferos.
  • El estudio destaca la interacción entre la proliferación celular, la migración neuronal y la evolución neocortical.