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Videos de Conceptos Relacionados

Chemotaxis and Direction of Cell Migration01:21

Chemotaxis and Direction of Cell Migration

Cells can detect chemical cues in their environment and reorganize the cytoskeleton to migrate toward them or away from them. This directional migration, called chemotaxis, is essential during embryogenesis and development, immune response, tissue repair and regeneration, and reproduction. These chemical cues can either attract or repel the cell's movement. For example, axon development is determined by a combination of chemoattractants and chemorepellents that direct the growing axon towards...
Propagation of Action Potentials01:23

Propagation of Action Potentials

The propagation of an action potential refers to the process by which a nerve impulse, or "action potential," travels along a neuron.
Neurons (nerve cells) have a resting membrane potential, with a slightly negative charge inside compared to outside. This is maintained by ion channels, such as sodium (Na+) and potassium (K+) channels, which control the flow of ions. When a stimulus, like a touch or a signal from another neuron, triggers the neuron, sodium channels open, allowing sodium ions to...
Neurogenesis and Regeneration of Nervous Tissue01:15

Neurogenesis and Regeneration of Nervous Tissue

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...
Spinal Cord: Cross-sectional Anatomy01:16

Spinal Cord: Cross-sectional Anatomy

The cross-sectional anatomy of the spinal cord offers a detailed view of its complex structure and function within the central nervous system. At the core of the spinal cord lies the gray matter, characterized by its butterfly or "H"-shaped appearance in cross-section. This central region is enveloped by white matter, with the overall structure divided into symmetrical halves by the dorsal median sulcus and the ventral median fissure.
Gray Matter and its Components
Central to the gray matter is...
Spinal Cord: Information Processing01:10

Spinal Cord: Information Processing

The spinal cord is an integral hub for motor and sensory information that enables the brain to communicate with the peripheral nervous system (PNS). This communication consists of relaying sensory data and transmission of motor commands.
Sensory Information Processing
Sensory information processing begins at the sensory receptors located in the skin and other tissues, which detect somatic sensory stimuli such as touch, temperature, or pain. These receptors function as catalysts, initiating...

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Video Experimental Relacionado

Updated: Jul 10, 2026

Electric Field-controlled Directed Migration of Neural Progenitor Cells in 2D and 3D Environments
11:15

Electric Field-controlled Directed Migration of Neural Progenitor Cells in 2D and 3D Environments

Published on: February 16, 2012

Nuevas direcciones en la migración neuronal.

Mary E Hatten1

  • 1Laboratory of Developmental Neurobiology, The Rockefeller University, 1230 York Avenue, New York, NY 10021-6399, USA. hatten@rockefeller.edu

Science (New York, N.Y.)
|September 7, 2002
PubMed
Resumen

Los análisis genéticos revelan mecanismos moleculares conservados que guían la migración neuronal tanto en invertebrados como en vertebrados. Estos hallazgos mejoran nuestra comprensión del desarrollo y la evolución del sistema nervioso central.

Área de la Ciencia:

  • La neurociencia es la neurociencia.
  • Biología del desarrollo Biología del desarrollo.
  • Genética La genética.

Sus antecedentes:

  • La migración neuronal es crucial para el desarrollo del sistema nervioso central (SNC).
  • Comprender la base molecular de la migración neuronal es clave para descifrar los procesos de desarrollo.
  • Los enfoques genéticos han proporcionado recientemente importantes conocimientos sobre estos mecanismos.

Objetivo del estudio:

  • Revisar los mecanismos moleculares de la migración neuronal.
  • Para resaltar la conservación de estos mecanismos en todas las especies.
  • Discutir la integración de diferentes vías migratorias en el desarrollo del SNC.

Principales métodos:

  • Revisión de análisis genéticos recientes y estudios moleculares.

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  • Análisis comparativo de los mecanismos migratorios en invertebrados y vertebrados.
  • Discusión de los enfoques genéticos que definen las vías moleculares.

    • Principales resultados:

    • Muchos mecanismos moleculares que guían la migración neuronal de los invertebrados se conservan en los vertebrados.
    • Estos mecanismos conservados controlan varios patrones de migración, incluidos los movimientos radiales, tangenciales y anterior-posterior.
    • Los estudios genéticos han aclarado las moléculas específicas y las vías involucradas.

    Conclusiones:

    • La migración neuronal implica una compleja interacción de mecanismos moleculares conservados.
    • Comprender estos mecanismos proporciona información sobre el desarrollo y la evolución del SNC.
    • El análisis genético es una herramienta poderosa para diseccionar las vías de migración neuronal.