Video Experimental Relacionado
Updated: May 1, 2026
07:51
Inhibitory Synapse Formation in a Co-culture Model Incorporating GABAergic Medium Spiny Neurons and HEK293 Cells Stably Expressing GABAA Receptors
Published on: November 14, 2014
19.5K
Las sinapsis específicas se desarrollan preferentemente entre las neuronas excitatorias hermanas en el neocórtex
Yong-Chun Yu1, Ronald S Bultje, Xiaoqun Wang
1Developmental Biology Program, Memorial Sloan Kettering Cancer Centre, 1275 York Avenue, USA.
Nature
|February 11, 2009
Resumen
Las neuronas excitatorias recién nacidas en los clones radiales forman conexiones específicas dentro del neocórtex en desarrollo. Esta organización clonal contribuye a la formación de columnas neuronales funcionales en el cerebro maduro.
Área de la Ciencia:
- La neurociencia es la neurociencia.
- Biología del desarrollo Biología del desarrollo.
- La neurociencia celular es la neurociencia celular.
Sus antecedentes:
- Las neuronas neocorticales de los mamíferos se organizan en columnas funcionales con conexiones sinápticas específicas.
- La conectividad sináptica neocortical es escasa y específica, permitiendo el procesamiento independiente de la información por las neuronas adyacentes.
- La construcción del microcircuito subyacente a la arquitectura de columnas a nivel de neuronas individuales no se entiende completamente.
Objetivo del estudio:
- Investigar si los clones radiales de neuronas excitatorias en el desarrollo de la neocórtex forman la base de microcircuitos específicos.
- Determinar si las neuronas hermanas dentro de los clones radiales establecen conexiones sinápticas preferenciales.
Principales métodos:
- Clones radiales ontogenéticos etiquetados de neuronas excitadoras en el neocórtex de ratón utilizando retrovirus que expresan la proteína fluorescente verde mejorada (EGFP).
- Realizó grabaciones de células enteras con múltiples electrodos para analizar la formación de sinapsis entre neuronas hermanas y no hermanas durante el desarrollo posnatal.
Principales resultados:
- Las neuronas excitatorias hermanas radialmente alineadas mostraron una propensión a formar sinapsis químicas unidireccionales entre sí.
- Las conexiones sinápticas entre neuronas hermanas exhibieron la misma preferencia direccional interlaminar observada en el neocórtex maduro.
- Estas conexiones fueron más frecuentes entre neuronas hermanas que entre neuronas hermanas y no hermanos adyacentes.
Conclusiones:
- Los microcircuitos específicos se desarrollan preferentemente dentro de los clones radiales de las neuronas excitatorias en el neocórtex en desarrollo.
- Los clones radiales ontogenéticos sirven como sustrato para el surgimiento de microarquitecturas funcionales columnares.
- Este hallazgo arroja luz sobre la base celular de la organización columnar neocortical.
Más Videos Relacionados
10:24Electrophysiological and Morphological Characterization of Neuronal Microcircuits in Acute Brain Slices Using Paired Patch-Clamp Recordings
Published on: January 10, 2015
16.8K
09:09Electrophysiological Investigations of Retinogeniculate and Corticogeniculate Synapse Function
Published on: August 7, 2019
5.8K
Videos de Conceptos Relacionados
01:12Synaptic Signaling
70.0K
Neurons communicate at synapses, or junctions, to excite or inhibit the activity of other neurons or target cells, such as muscles. Synapses may be chemical or electrical.
70.0K
02:47The Synapse
99.9K
Neurons communicate with one another by passing on their electrical signals to other neurons. A synapse is the location where two neurons meet to exchange signals. At the synapse, the neuron that sends the signal is called the presynaptic cell, while the neuron that receives the message is called the postsynaptic cell. Note that most neurons can be both presynaptic and postsynaptic, as they both transmit and receive information.
99.9K
01:09Synaptic Signaling
5.7K
Neurons communicate at synapses, or junctions, to excite or inhibit the activity of other neurons or target cells, such as muscles. Synapses may be chemical or electrical.
Most synapses are chemical, meaning an electrical impulse or action potential spurs the release of chemical messengers called neurotransmitters. The neuron sending the signal is called the presynaptic neuron, and the neuron receiving the signal is the postsynaptic neuron.
The presynaptic neuron fires an action potential that...
Most synapses are chemical, meaning an electrical impulse or action potential spurs the release of chemical messengers called neurotransmitters. The neuron sending the signal is called the presynaptic neuron, and the neuron receiving the signal is the postsynaptic neuron.
The presynaptic neuron fires an action potential that...
5.7K
01:28Electrical Synapses
10.1K
Electrical synapses found in all nervous systems play important and unique roles. In these synapses, the presynaptic and postsynaptic membranes are very close together (3.5 nm) and are actually physically connected by channel proteins forming gap junctions.
Gap junctions allow the current to pass directly from one cell to the next. In contrast, in the chemical synapse, the neurotransmitters carry the information through the synaptic cleft from one neuron to the next. They consist of two...
Gap junctions allow the current to pass directly from one cell to the next. In contrast, in the chemical synapse, the neurotransmitters carry the information through the synaptic cleft from one neuron to the next. They consist of two...
10.1K
01:25Overview of Synapses
10.9K
A synapse is a specialized structure where two neurons connect, allowing them to pass an electrical or chemical signal to another neuron. It is the point of communication between neurons. The term "synapse" is derived from the Greek word "synapsis," which means "conjunction." The entire process of neural communication revolves around the synapse. When activated, a neuron releases chemicals known as neurotransmitters into the synapse. These neurotransmitters cross the synapse and bind to...
10.9K
01:25Neural Circuits
3.0K
Neural circuits and neuronal pools are two of the main structures found in the nervous system. Neural circuits are networks of neurons that work together to carry out a specific task or process. They consist of interconnected neurons and glial cells, which provide structural and metabolic support.
Neuronal pools are collections of nerve cells with similar functions and interact through chemical and electrical signals. These pools include both interneurons (the central neural circuit nodes that...
Neuronal pools are collections of nerve cells with similar functions and interact through chemical and electrical signals. These pools include both interneurons (the central neural circuit nodes that...
3.0K