Video Experimental Relacionado
Updated: Feb 15, 2026
10:15
Visualizing the Beating Heart in Drosophila
Published on: September 28, 2009
19.5K
Procesamiento del color en el sistema visual temprano de Drosophila
Christopher Schnaitmann1, Väinö Haikala1, Eva Abraham1
1Department for Animal Physiology and Neurobiology, Institute of Biology I, Albert-Ludwigs-University Freiburg, 79104 Freiburg, Germany.
Cell
|January 13, 2018
Resumen
Los investigadores estudiaron la visión del color en las moscas de la fruta y descubrieron que los primeros circuitos visuales procesan la información del color. Este procesamiento ocurre en la primera sinapsis, similar a los vertebrados pero con mecanismos moleculares distintos.
Área de la Ciencia:
- La neurociencia
- Ciencia de la visión
- Biología de los insectos
Sus antecedentes:
- La visión del color se basa en la comparación de señales de diferentes fotorreceptores.
- Las neuronas de color oponente codifican la información espectral por excitación e inhibición diferenciales.
- Comprender la base neuronal de la visión del color en los organismos modelo ofrece información sobre los principios conservados.
Objetivo del estudio:
- Para investigar la implementación del circuito de procesamiento de color-oponente en el sistema visual de Drosophila.
- Identificar las vías neuronales específicas y los mecanismos moleculares involucrados en la visión temprana del color.
- Para comparar los orígenes evolutivos del procesamiento de color-oponente entre insectos y vertebrados.
Principales métodos:
- Utilizamos imágenes de calcio de dos fotones para monitorear la actividad neuronal.
- Empleó disección genética para analizar circuitos visuales específicos.
- Se examinaron las terminales fotorreceptoras y las interacciones sinápticas.
Principales resultados:
- El procesamiento de color oponente para UVcorto/azul y UVlargo/verde está establecido en los terminales de fotorreceptores R7/R8.
- La inhibición mutua entre los fotorreceptores R7 y R8 se produce a través de los receptores de histamina HisCl1.
- La inhibición de la retroalimentación que involucra al receptor de histamina de Ort modula este procesamiento.
Conclusiones:
- El procesamiento de color-oponente está presente en la primera sinapsis visual en Drosophila.
- Este procesamiento temprano es un principio compartido con los vertebrados, lo que sugiere una evolución convergente.
- Diferentes mecanismos moleculares y celulares destacan las trayectorias evolutivas independientes para la visión del color.
Videos de Conceptos Relacionados
03:02Colors and Magnetism
14.2K
Color in Coordination Complexes
When atoms or molecules absorb light at the proper frequency, their electrons are excited to higher-energy orbitals. For many main group atoms and molecules, the absorbed photons are in the ultraviolet range of the electromagnetic spectrum, which cannot be detected by the human eye. For coordination compounds, the energy difference between the d orbitals often allows photons in the visible range to be absorbed and emitted, which is seen as colors by the human...
When atoms or molecules absorb light at the proper frequency, their electrons are excited to higher-energy orbitals. For many main group atoms and molecules, the absorbed photons are in the ultraviolet range of the electromagnetic spectrum, which cannot be detected by the human eye. For coordination compounds, the energy difference between the d orbitals often allows photons in the visible range to be absorbed and emitted, which is seen as colors by the human...
14.2K
01:24Color Vision
1.6K
Color perception begins in the retina, the light-sensitive layer at the back of the eye. Two main theories explain how colors are seen: the trichromatic theory and the opponent-process theory. The trichromatic theory, proposed by Thomas Young in 1802 and extended by Hermann von Helmholtz in 1852, suggests that color vision is based on three types of cone receptors in the retina. These cones are sensitive to different but overlapping ranges of wavelengths corresponding to red, blue, and green.
1.6K
01:14Changes in Skin Color: Clinical Perspectives
3.8K
The first thing a clinician sees is the skin, so the examination of the skin should be part of any thorough physical examination. Most skin disorders are relatively benign, but a few, including melanomas, can be fatal if untreated. A couple of the more noticeable disorders, albinism and vitiligo, affect the appearance of the skin and its accessory organs.
Albinism
Albinism is a genetic disorder that affects (completely or partially) the coloring of skin, hair, and eyes. The defect is primarily...
Albinism
Albinism is a genetic disorder that affects (completely or partially) the coloring of skin, hair, and eyes. The defect is primarily...
3.8K
01:20Parallel Processing
780
The brain processes sensory information rapidly due to parallel processing, which involves sending data across multiple neural pathways at the same time. This method allows the brain to manage various sensory qualities, such as shapes, colors, movements, and locations, all concurrently. For instance, when observing a forest landscape, the brain simultaneously processes the movement of leaves, the shapes of trees, the depth between them, and the various shades of green. This enables a quick and...
780
01:30Information Processing Approach
610
The information-processing theory of cognitive development centers on fundamental mental processes, including attention, memory, and problem-solving skills. Researchers in this field examine how cognitive abilities, such as working memory, evolve and influence children's overall development. Studies indicate that children with stronger working memory tend to excel in reading comprehension, math, and problem-solving compared to peers with less efficient memory skills. Low working memory is...
610
01:29Processes of Self-Presentation
260
Effective self-presentation is a central component of social interaction and identity construction. It relies on the dynamic processes of defining the situation and engaging in self-disclosure. These mechanisms help individuals navigate social context expectations and manage how others perceive them, fostering mutual understanding and relationship development.Defining the SituationSocial situations are shaped by collectively understood frames—a set of widely understood rules or...
260