Video Experimental Relacionado
Updated: Jun 13, 2026
07:33
Optogenetic Entrainment of Hippocampal Theta Oscillations in Behaving Mice
Published on: June 29, 2018
11.9K
Los interruptores naturales en el comportamiento modulan rápidamente la codificación del hipocampo
Ayelet Sarel1, Shaked Palgi1, Dan Blum1
1Department of Brain Sciences, Weizmann Institute of Science, Rehovot, Israel.
Nature
|August 24, 2022
Resumen
Los circuitos cerebrales cambian rápidamente las representaciones durante los cambios de comportamiento. En los murciélagos, las neuronas del hipocampo cambiaron de codificar la propia posición a codificar conjuntamente la propia posición y la distancia entre murciélagos, lo que permite una navegación flexible.
Área de la Ciencia:
- La neurociencia
- Etiología
- Neurociencia computacional
Sus antecedentes:
- Comprender cómo el cerebro maneja la flexibilidad del comportamiento es crucial.
- La neurociencia actual a menudo estudia comportamientos individuales, lo que limita la comprensión del cambio de comportamiento.
Objetivo del estudio:
- Investigar cómo los circuitos neuronales representan los interruptores entre diferentes comportamientos.
- Examinar el papel de los circuitos del hipocampo en la navegación dinámica y la interacción social.
Principales métodos:
- Actividad neuronal registrada en murciélagos durante el vuelo naturalista.
- Utilizó un entorno etológico con murciélagos volando solos y en proximidad.
- Se analizó la actividad de las neuronas CA1 del hipocampo durante la navegación y la evitación de colisiones.
Principales resultados:
- Las neuronas CA1 del hipocampo cambiaron las representaciones rápidamente (dentro de los 100 ms) durante las transiciones de comportamiento.
- Las neuronas cambiaron de codificar la auto-posición a codificar conjuntamente la auto-posición y la distancia entre murciélagos.
- Esta codificación compleja estaba vinculada a las señales de atención y apoyaba el procesamiento eficiente de la información.
Conclusiones:
- Las neuronas del hipocampo muestran una notable flexibilidad, adaptando rápidamente sus cálculos a las variables de comportamiento relevantes.
- Este cambio rápido apoya la flexibilidad del comportamiento en entornos dinámicos y naturalistas.
- Los hallazgos proporcionan información sobre las bases neuronales del comportamiento adaptativo y la navegación social.
Videos de Conceptos Relacionados
01:06Fixed Action Patterns
A fixed action pattern (FAP) is a specific, hard-wired sequence of behaviors that occurs in response to an external stimulus, called a sign stimulus. The behavior is “fixed” because it is essentially unchangeable—proceeding similarly across individuals of a species every time it occurs.
03:06From DNA to Protein
The flow of genetic information in cells from DNA to mRNA to protein is described by the central dogma, which states that genes specify the sequence of mRNAs, which in turn specify the sequence of amino acids making up all proteins. The decoding of one molecule to another is performed by specific proteins and RNAs. Because the information stored in DNA is so central to cellular function, it makes intuitive sense that the cell would make mRNA copies of this information for protein synthesis...
02:05Gene Evolution - Fast or Slow?
The genomes of eukaryotes are punctuated by long stretches of sequence which do not code for proteins or RNAs. Although some of these regions do contain crucial regulatory sequences, the vast majority of this DNA serves no known function. Typically, these regions of the genome are the ones in which the fastest change, in evolutionary terms, is observed, because there is typically little to no selection pressure acting on these regions to preserve their sequences.
In contrast, regions which code...
In contrast, regions which code...
01:25Transformers with Off-Nominal Turns Ratios
In scenarios involving parallel transformers with disparate ratings, developing per-unit models requires accommodating off-nominal turns ratios. This situation arises when the selected base voltages are not proportional to the transformer’s voltage ratings. Consider a transformer where the rated voltages are related by the term a. If the chosen voltage bases satisfy a relationship involving term b, term c is defined as the ratio of these bases. This ratio is then substituted into the rated...
01:05Instinctive Drift
Instinctive drift refers to the tendency of animals to revert to their innate behaviors despite repeated reinforcement. Breland and Breland demonstrated this concept in an experiment with a raccoon. The raccoon was trained to pick up two coins and place them in a container in exchange for food. Initially, the raccoon learned to associate the coins with food, making them a conditioned stimulus or a substitute for food. However, over time, the raccoon became less willing to put the coins into the...
01:28Automatic Processing and Automatic Social Behavior
Automatic processing refers to the cognitive operations that occur without conscious intent or awareness, playing a fundamental role in shaping social cognition and behavior. These processes enable individuals to navigate complex social environments efficiently by relying on mental shortcuts and pre-existing knowledge structures known as schemas. One of the most influential mechanisms underlying automatic processing is priming, which subtly activates mental representations through exposure to...