Video Experimental Relacionado
Updated: Feb 5, 2026
08:34
The Measurement and Treatment of Suppression in Amblyopia
Published on: December 14, 2012
50.6K
Un filtro cortical que aprende a suprimir las consecuencias acústicas del movimiento
David M Schneider1,2, Janani Sundararajan1, Richard Mooney3
1Department of Neurobiology, Duke University School of Medicine, Durham, NC, USA.
Nature
|September 14, 2018
Resumen
Los ratones aprendieron a suprimir los sonidos predecibles de sus movimientos usando un nuevo sistema de realidad virtual acústica. Esta experiencia mejoró su capacidad para detectar nuevos sonidos, revelando mecanismos de filtrado sensorial adaptativos.
Área de la Ciencia:
- La neurociencia
- Percepción auditiva
- Integración sensoriomotora
Sus antecedentes:
- Anticipar los sonidos relacionados con el movimiento (reaferentes) es crucial para la audición.
- Los circuitos neuronales para aprender a suprimir estos sonidos son en gran parte desconocidos.
Objetivo del estudio:
- Investigar los mecanismos neuronales para suprimir los sonidos reaferentes.
- Explorar las consecuencias conductuales de las experiencias sensoriomotrices predecibles.
Principales métodos:
- Desarrolló un sistema acústico de realidad virtual (AVR) para ratones.
- Los ratones entrenados para asociar nuevos sonidos con movimientos locomotores.
- Actividad y respuestas auditivas y motoras corticales analizadas.
Principales resultados:
- aVR experimenta respuestas corticales auditivas selectivamente suprimidas a las frecuencias reaferentes.
- Se fortaleció la activación cortical motora de las neuronas inhibidoras en la corteza auditiva.
- Los ratones demostraron una mayor detección de tonos no reactivos durante el movimiento.
Conclusiones:
- La experiencia da forma a un filtro sensorial dinámico que involucra a la corteza motora.
- Este filtro suprime selectivamente las consecuencias acústicas predecibles del movimiento.
- La plasticidad adaptativa mejora la detección auditiva durante la locomoción.
Videos de Conceptos Relacionados
01:08Timing and Consequences on Behavior
398
In operant conditioning, the timing of reinforcement is crucial. For animals like rats and cats, immediate reinforcement (within a few seconds) is much more effective than delayed reinforcement. For example, a food reward for a rat needs to follow within 30 seconds of pressing a bar to be effective.
Humans, however, can respond to delayed reinforcers. We often make decisions between immediate small rewards and delayed larger rewards. This ability to delay gratification is a significant...
Humans, however, can respond to delayed reinforcers. We often make decisions between immediate small rewards and delayed larger rewards. This ability to delay gratification is a significant...
398
01:27Passive Filters
1.0K
Passive filters are utilized to shape the frequency spectrum of signals across a diverse array of applications. These filters, using only passive elements like resistors (R), inductors (L), and capacitors (C), are capable of selectively allowing or blocking certain frequency ranges without the need for external power sources.
Low-Pass Filters
Low-pass filters are designed to transmit signals with frequencies lower than the cutoff frequency, ωc, and attenuate those above it. The cutoff...
Low-Pass Filters
Low-pass filters are designed to transmit signals with frequencies lower than the cutoff frequency, ωc, and attenuate those above it. The cutoff...
1.0K
01:25Active Filters
1.3K
Active filters are electronic circuits that use operational amplifiers (op-amps), resistors, and capacitors to filter out unwanted frequency components from a signal. A first-order low-pass active filter is designed to pass signals with a frequency lower than a certain cutoff frequency and attenuate frequencies higher than that cutoff frequency. The transfer function for a first-order low-pass active filter is:
1.3K
00:51Anatomical Movements
16.1K
Anatomical movements refer to the various actions or motions that can be performed by the body's joints and muscles. These movements are described using specific terms to provide a standardized way of discussing and understanding the range of motion at different joints.
Here are some common anatomical movements:
Flexion and extension motions are in the sagittal (anterior–posterior) plane of motion. These movements take place at the shoulder, hip, elbow, knee, wrist,...
Here are some common anatomical movements:
Flexion and extension motions are in the sagittal (anterior–posterior) plane of motion. These movements take place at the shoulder, hip, elbow, knee, wrist,...
16.1K
01:14Avoidance Learning and Learned Helplessness
2.6K
Avoidance learning and learned helplessness are critical concepts in understanding behavioral responses to negative stimuli.
Avoidance learning occurs when an organism learns that a specific behavior can prevent an unpleasant outcome. For example, a student who receives a bad grade may start studying harder to avoid future poor grades. This behavior persists even when the negative outcome is no longer present. Avoidance learning is powerful because it maintains behavior in the absence of the...
Avoidance learning occurs when an organism learns that a specific behavior can prevent an unpleasant outcome. For example, a student who receives a bad grade may start studying harder to avoid future poor grades. This behavior persists even when the negative outcome is no longer present. Avoidance learning is powerful because it maintains behavior in the absence of the...
2.6K
01:43The Movement of Organelles and Vesicles
6.5K
In eukaryotic cells, cytoskeletal filaments such as actin, microtubules, and intermediate filaments form a mesh-like cytoskeletal network. These filaments serve as tracks for transporting cellular cargo. Specialized motor proteins use the chemical energy stored in adenosine triphosphate (ATP) for this transport. During interphase, microtubules are polarized, with the plus-end towards the cell periphery and the minus-end towards the cell center. Two microtubule-associated motor proteins,...
6.5K