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Videos de Conceptos Relacionados

Visual System01:26

Visual System

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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...
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Vision01:24

Vision

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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.
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Motor and Sensory Areas of the Cortex01:14

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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....
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Association Areas of the Cortex01:21

Association Areas of the Cortex

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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,...
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Gestalt Principles of Perception01:21

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Gestalt principles provide a framework for understanding how humans perceive objects as unified wholes within their context. These principles are essential in explaining the cognitive processes that make sense of complex visual stimuli by organizing them into coherent groups. One fundamental principle is proximity, which posits that objects located close to each other are perceived as a collective group. For instance, when dots are positioned near one another, the visual system interprets them...
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Perceptual Constancy01:12

Perceptual Constancy

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Perceptual constancy is the ability to recognize that objects remain consistent and unchanged even when their appearance varies due to changes in sensory input. There are four main types of perceptual constancy: size constancy, shape constancy, color constancy, and brightness constancy.
Size constancy is the recognition that an object remains the same size, even when its image on the retina changes. For instance, a bus is perceived to be large enough to carry people, even if it looks tiny from...
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Updated: Sep 10, 2025

Dynamic Inter-subject Functional Connectivity Reveals Moment-to-Moment Brain Network Configurations Driven by Continuous or Communication Paradigms
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Estructuras relacionales invariables entre sujetos en la corteza visual humana de alto orden

Ofer Lipman1, Shany Grossman2,3, Doron Friedman4

  • 1Efi Arazi School of Computer Science, Reichman University, Herzliya, Israel.

Nature communications
|August 27, 2025
PubMed
Resumen
Este resumen es generado por máquina.

Los individuos comparten una visión similar del mundo debido a la codificación relacional en el cerebro. Este código neuronal, basado en similitudes de patrones de activación, permite la cooperación y la comunicación al garantizar una percepción visual consistente entre las personas.

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Área de la Ciencia:

  • La neurociencia
  • Ciencias cognitivas
  • Percepción visual

Sus antecedentes:

  • La percepción compartida es fundamental para la cooperación y la comunicación humanas.
  • Comprender las propiedades neurales invariantes entre los individuos es clave para descifrar la percepción visual.
  • Los mecanismos de codificación neuronal que subyacen a las similitudes entre sujetos siguen siendo en gran medida desconocidos.

Objetivo del estudio:

  • Identificar el esquema de codificación neuronal más consistente en la corteza visual de los individuos.
  • Investigar las bases neuronales de la percepción visual compartida.
  • Determinar si la codificación relacional subyace a las similitudes en el procesamiento visual.

Principales métodos:

  • Se obtuvieron grabaciones intracraneales de 19 pacientes durante una tarea de reconocimiento visual.
  • Analizamos 244 contactos visuales de alto nivel en tres grupos de pacientes.
  • Comparó la consistencia entre sujetos de la codificación relacional, la codificación de patrones de activación y la codificación lineal.

Principales resultados:

  • La codificación relacional, definida por las distancias de similitud entre los patrones de activación, mostró la mayor consistencia entre los individuos.
  • La codificación del patrón de activación y la codificación lineal demostraron una menor consistencia entre sujetos.
  • Estos hallazgos indican que la codificación relacional es una representación neural prevalente.

Conclusiones:

  • La codificación relacional es soportada como el código neuronal primario para el contenido perceptivo compartido en el cerebro humano.
  • Este esquema de codificación explica las similitudes observadas en la percepción visual entre los individuos.
  • El estudio proporciona información sobre la base neuronal de la cooperación y la comunicación humanas a través de la experiencia visual compartida.