La experiencia sensoriomotriz remapa la entrada visual a una red de dirección de rumbo
Video Experimental Relacionado
Updated: Jan 3, 2026

09:46
MPI CyberMotion Simulator: Implementation of a Novel Motion Simulator to Investigate Multisensory Path Integration in Three Dimensions
Published on: May 10, 2012
13.1K
Yvette E Fisher1, Jenny Lu1, Isabel D'Alessandro1
1Department of Neurobiology, Harvard Medical School, Boston, MA, USA.
Nature
|November 22, 2019
Resumen
Uso de las moscas de la fruta
Área de la Ciencia:
- La neurociencia
- El comportamiento de los animales
Sus antecedentes:
- Las neuronas de brújula de Drosophila integran el auto-movimiento para la estimación del rumbo.
- Las señales visuales mejoran la precisión del rumbo, con las neuronas R mediando la entrada.
- El mecanismo de integración de señales visuales en la red de la brújula sigue sin estar claro.
Objetivo del estudio:
- Investigar cómo las señales visuales se integran en la red de neuronas de la brújula de Drosophila.
- Determinar el papel de las neuronas R en la mediación de la entrada visual a las neuronas de la brújula.
- Elucidar la plasticidad del procesamiento visual en el sistema de brújula.
Principales métodos:
- Registros in vivo de células enteras en Drosophila.
- Imágenes de conjunto de calcio.
- Exploración de entornos de realidad virtual alterados.
Principales resultados:
- Las señales visuales evocan la inhibición sináptica en las neuronas de la brújula, mediada por las neuronas R.
- Las neuronas de la brújula exhiben sensibilidades de posición de señales visuales específicas.
- Los patrones de inhibición evocados visualmente se reorganizan con los cambios ambientales, alterando el marco de coordenadas de la brújula.
Conclusiones:
- La depresión sináptica asociativa a largo plazo de la inhibición evocada visualmente subyace a la plasticidad.
- Esta plasticidad concilia el auto-movimiento con señales externas para un sentido coherente de dirección.
- Los hallazgos apoyan los modelos de plasticidad asociativa combinados con la dinámica del atractor para la navegación.
Videos de Conceptos Relacionados
Vision
59.2K
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.
59.2K
Visual System
1.6K
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...
1.6K
Major Somatic Sensory Pathways
2.2K
Sensory impulses related to touch, pressure, vibration, and proprioception from various body parts, such as the limbs, trunk, neck, and posterior head, travel to the cerebral cortex through the posterior column-medial lemniscus pathway. The pathway’s name derives from the two white-matter tracts that convey the impulses: the spinal cord's posterior column and the brainstem's medial lemniscus. First-order sensory neurons extend their axons into the spinal cord, forming the...
2.2K
Motor and Sensory Areas of the Cortex
6.7K
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....
6.7K
Depth Perception and Spatial Vision
1.7K
Depth perception is the ability to perceive objects three-dimensionally. It relies on two types of cues: binocular and monocular. Binocular cues depend on the combination of images from both eyes and how the eyes work together. Since the eyes are in slightly different positions, each eye captures a slightly different image. This disparity between images, known as binocular disparity, helps the brain interpret depth. When the brain compares these images, it determines the distance to an object.
1.7K
Somatosensation
42.8K
The somatosensory system relays sensory information from the skin, mucous membranes, limbs, and joints. Somatosensation is more familiarly known as the sense of touch. A typical somatosensory pathway includes three types of long neurons: primary, secondary, and tertiary. Primary neurons have cell bodies located near the spinal cord in groups of neurons called dorsal root ganglia. The sensory neurons of ganglia innervate designated areas of skin called dermatomes.
42.8K

