Memorias de investigación
Artículos en revistas:
Three-dimensional spatial distribution of synapses in the neocortex: A dual-beam electron microscopy study
Año:2014
Áreas de investigación
  • Inteligencia artificial
Datos
Descripción
In the cerebral cortex, most synapses are found in the neuropil, but relatively little is known about their 3-dimensional organization. Using an automated dual-beam electron microscope that combines focused ion beam milling and scanning electron microscopy, we have been able to obtain 10 three-dimensional samples with an average volume of 180 µm(3) from the neuropil of layer III of the young rat somatosensory cortex (hindlimb representation). We have used specific software tools to fully reconstruct 1695 synaptic junctions present in these samples and to accurately quantify the number of synapses per unit volume. These tools also allowed us to determine synapse position and to analyze their spatial distribution using spatial statistical methods. Our results indicate that the distribution of synaptic junctions in the neuropil is nearly random, only constrained by the fact that synapses cannot overlap in space. A theoretical model based on random sequential absorption, which closely reproduces the actual distribution of synapses, is also presented.
Internacional
Si
JCR del ISI
Si
Título de la revista
Cerebral Cortex
ISSN
1047-3211
Factor de impacto JCR
6,828
Información de impacto
Volumen
24
DOI
Número de revista
Desde la página
1579
Hasta la página
1588
Mes
SIN MES
Ranking
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Participantes
  • Autor: A. Merchán-Pérez
  • Autor: J.R. Rodríguez
  • Autor: S. González
  • Autor: V. Robles
  • Autor: J. DeFelipe
  • Autor: P. Larrañaga
  • Autor: Maria Concepcion Bielza Lozoya UPM
Grupos de investigación, Departamentos, Centros e Institutos de I+D+i relacionados
  • Creador: Grupo de Investigación: Computational Intelligence Group
  • Departamento: Inteligencia Artificial