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Neuron Structure01:30

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Neurons are the main type of cell in the nervous system that generate and transmit electrochemical signals. They primarily communicate with each other using neurotransmitters at specific junctions called synapses. Neurons come in many shapes that often relate to their function, but most share three main structures: an axon and dendrites that extend out from a cell body.
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In the CNS, neurogenesis, the birth of new neurons from stem cells, is limited to the hippocampus in adults. In other regions of the brain and spinal cord, neurogenesis is almost non-existent due to inhibitory influences from neuroglia, especially oligodendrocytes, and the absence of growth-stimulating cues. The myelin produced by oligodendrocytes in the CNS inhibits neuronal regeneration. Furthermore, astrocytes proliferate rapidly after neuronal damage, forming scar tissue that physically...
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Neuroplasticity01:01

Neuroplasticity

Neuroplasticity reflects the brain's remarkable capacity to adapt and evolve, responding dynamically to learning, experiences, or injury by reorganizing its neural circuitry. This reorganization involves creating new neural connections and refining old ones through a series of biological processes that contribute to the brain's lifelong development and adaptability.
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Updated: Jul 4, 2026

Assessment of Ultrastructural Neuroplasticity Parameters After In Utero Transduction of the Developing Mouse Brain and Spinal Cord
10:28

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Published on: February 26, 2019

Evolución del cerebro y singularidad en el genoma humano.

Jordan P Amadio1, Christopher A Walsh

  • 1Division of Genetics, Children's Hospital Boston, Howard Hughes Medical Institute, Beth Israel Deaconess Medical Center, and Broad Institute of MIT and Harvard, Boston, MA 02115, USA.

Cell
|September 23, 2006
PubMed
Resumen

Los investigadores descubrieron un nuevo gen de ARN no codificante con una estructura humana única. Este gen evolucionó rápidamente en los seres humanos y puede desempeñar un papel en la regulación del desarrollo del cerebro humano.

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Área de la Ciencia:

  • Biología evolutiva Biología evolutiva.
  • La genómica es la genómica.
  • La neurociencia es la neurociencia.

Sus antecedentes:

  • La evolución del cerebro humano único no se entiende bien.
  • Los genomas de los mamíferos ofrecen pistas sobre la historia evolutiva humana.

Objetivo del estudio:

  • Para identificar los elementos genéticos específicos del ser humano que evolucionaron rápidamente.
  • Investigar el papel potencial de estos elementos en la evolución del cerebro humano.

Principales métodos:

  • Análisis comparativo de genómica de los genomas humanos y de otros mamíferos.
  • Búsqueda bioinformática de elementos de ADN conservados de corta duración con una rápida evolución específica del ser humano.
  • Identificación y caracterización de un nuevo gen de ARN no codificante.

Principales resultados:

  • Se identificó un nuevo gen de ARN no codificante que exhibe una rápida evolución exclusivamente en el linaje humano.
  • Este gen posee una conformación estructural única específica para los humanos.
  • El ARN no codificante puede funcionar como un regulador del desarrollo neurológico.

Conclusiones:

  • El ARN no codificante identificado representa un elemento potencialmente crucial en la evolución del cerebro humano.
  • Investigaciones adicionales sobre la función de este gen podrían iluminar la base genética de la singularidad del desarrollo neurológico humano.