Video Experimental Relacionado
Updated: Aug 28, 2025
06:46
Investigating the Deployment of Visual Attention Before Accurate and Averaging Saccades via Eye Tracking and Assessment of Visual Sensitivity
Published on: March 18, 2019
7.2K
Distinguir externamente del movimiento inducido por sacada en la corteza visual
Satoru K Miura1,2,3, Massimo Scanziani4,5,6
1Center for Neural Circuits and Behavior, Neurobiology Section and Department of Neuroscience, University of California, San Diego, La Jolla, CA, USA. smiura@ucla.edu.
Nature
|September 14, 2022
Resumen
El cerebro distingue el movimiento auto-generado de los cambios ambientales usando señales neuronales distintas en la corteza visual. Una vía que involucra el núcleo pulvinar ayuda a procesar los movimientos oculares frente al movimiento visual externo.
Área de la Ciencia:
- La neurociencia
- Procesamiento Sensorial
- Función del sistema visual
Sus antecedentes:
- El procesamiento sensorial requiere diferenciar los estímulos autogenerados de los cambios ambientales.
- La capacidad del sistema visual para distinguir el movimiento de la retina inducido por la sacudida del movimiento ambiental real no se entiende completamente.
Objetivo del estudio:
- Investigar cómo la corteza visual primaria del ratón (V1) diferencia el movimiento visual causado por sacadas autogeneradas del movimiento ambiental real.
- Para identificar los mecanismos neuronales que subyacen a esta discriminación sensorial.
Principales métodos:
- Registro de patrones de actividad neuronal en la corteza visual primaria del ratón (V1).
- Analizando las respuestas distintas al movimiento visual relacionado con la sacada y los estímulos visuales externos.
- Investigando el papel de la entrada no visual desde el núcleo pulvinar del tálamo.
Principales resultados:
- El ratón V1 exhibe patrones de actividad distintos para el movimiento inducido por sacada frente al movimiento ambiental.
- Durante las saccades, V1 integra la entrada visual con la entrada no visual desde el núcleo pulvinar.
- La entrada pulvinar es específica de la dirección de las saccades, mientras que la entrada visual es específica del desplazamiento de la imagen de la retina, con direcciones preferidas no correlacionadas.
Conclusiones:
- La entrada pulvinar permite respuestas V1 diferenciales al movimiento externo y autogenerado.
- La integración de la información sensorial y del movimiento corporal puede ser un mecanismo general para distinguir los estímulos autogenerados de los externos a través de las cortes sensoriales.
Más Videos Relacionados
Videos de Conceptos Relacionados
01:24Vision
55.1K
Vision is the result of light being detected and transduced into neural signals by the retina of the eye. This information is then further analyzed and interpreted by the brain. First, light enters the front of the eye and is focused by the cornea and lens onto the retina—a thin sheet of neural tissue lining the back of the eye. Because of refraction through the convex lens of the eye, images are projected onto the retina upside-down and reversed.
55.1K
01:21Association Areas of the Cortex
6.0K
Association areas are regions of the cerebral cortex that do not have a specific sensory or motor function. Instead, they integrate and interpret information from various sources to enable higher cognitive processes such as memory, learning, and decision-making. Some key association areas include the following:
Prefrontal Association Area: This area is located in the frontal lobe and is involved in planning, decision-making, and moderating social behavior. It connects with primary motor areas,...
Prefrontal Association Area: This area is located in the frontal lobe and is involved in planning, decision-making, and moderating social behavior. It connects with primary motor areas,...
6.0K
01:20Anatomy of the Eyeball
7.4K
The eye is a spherical, hollow structure composed of three tissue layers. The outer layer — the fibrous tunic, comprises the sclera — a white structure — and the cornea, which is transparent. The sclera encompasses some of the ocular surface, most of which is not visible. However, the 'white of the eye' is distinctively visible in humans compared to other species. The cornea, a clear covering at the front of the eye, enables light penetration. The eye's middle...
7.4K
01:26Visual System
658
Light enters the eye through the cornea, a transparent, dome-shaped surface covering the surface of the eyeball that helps to direct and focus incoming light. This light is then channeled toward the pupil, an adjustable opening whose size is controlled by the iris. The iris, a pigmented muscle, regulates the amount of light entering the eye by contracting or dilating the pupil, thereby ensuring optimal light levels for clear vision.
Once through the pupil, the light passes through the lens, a...
Once through the pupil, the light passes through the lens, a...
658
01:14Motor and Sensory Areas of the Cortex
4.5K
The cerebral cortex, the brain's outermost layer, is pivotal in processing complex cognitive tasks, emotions, and various sensory inputs and executing voluntary motor activities. This intricate structure is divided into three primary functional areas: the motor areas, sensory areas, and association areas.
Motor Areas
The motor areas located in the frontal lobe are central to controlling voluntary movements. This region is further subdivided into the primary motor cortex and the premotor cortex....
Motor Areas
The motor areas located in the frontal lobe are central to controlling voluntary movements. This region is further subdivided into the primary motor cortex and the premotor cortex....
4.5K
01:17Accessory Structures of the Eye
1.7K
Optical perception, or vision, is an extraordinary sense dependent on converting light signals received via the ocular organs. These organs, known as eyes, are securely positioned within the bony cavities of the skull, called orbits. The orbits serve a dual purpose: a protective shield for the ocular globes and a stable attachment point for the soft ocular tissues. The eye's external protective mechanisms include the eyelids, which are edged with lashes that act as a barrier against foreign...
1.7K