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Videos de Conceptos Relacionados

Olfaction01:25

Olfaction

The sense of smell is achieved through the activities of the olfactory system. It starts when an airborne odorant enters the nasal cavity and reaches olfactory epithelium (OE). The OE is protected by a thin layer of mucus, which also serves the purpose of dissolving more complex compounds into simpler chemical odorants. The size of the OE and the density of sensory neurons varies among species; in humans, the OE is only about 9-10 cm2.
The olfactory receptors are embedded in the cilia of the...
Physiology of Smell and Olfactory Pathway01:20

Physiology of Smell and Olfactory Pathway

Humans detect odors with the help of specialized cells located in the upper part of the nasal cavity, called olfactory receptor neurons (ORNs). ORNs possess hair-like structures called cilia, which are receptive to sensations from the inhaled air. When an odorant molecule binds to a specific receptor on the cell of the cilia, it leads to a series of events that ultimately cause the ORN to send electrical signals to the olfactory bulb in the brain through the olfactory nerves.
The olfactory...
Olfactory Receptors: Location and Structure01:03

Olfactory Receptors: Location and Structure

The process of olfaction, also known as the sense of smell, is a sophisticated chemical response system. The specialized sensory neurons that facilitate this process, known as olfactory receptor neurons, are situated in an upper segment of the nasal cavity, known as the olfactory epithelium. Olfactory sensory neurons are bipolar, with their dendrites extending from the epithelium's apex into the mucus that lines the nasal cavity. Airborne molecules, when inhaled, traverse the olfactory...
Auditory Pathway01:15

Auditory Pathway

Auditory pathways constitute the complex neural circuits responsible for transmitting and interpreting auditory information from the peripheral auditory system to the brain. Sound waves are initially captured by the outer ear, funneled through the ear canal, and reach the tympanic membrane (eardrum). These vibrations are transmitted via the middle ear's ossicles to the inner ear's cochlea.
When viewed cross-sectionally, the cochlea reveals the scala vestibuli and scala tympani flanking the...
The Cochlea01:13

The Cochlea

The cochlea is a coiled structure in the inner ear that contains hair cells—the sensory receptors of the auditory system. Sound waves are transmitted to the cochlea by small bones attached to the eardrum called the ossicles, which vibrate the oval window that leads to the inner ear. This causes fluid in the chambers of the cochlea to move, vibrating the basilar membrane.
Neural Circuits01:25

Neural Circuits

Neural circuits and neuronal pools are two of the main structures found in the nervous system. Neural circuits are networks of neurons that work together to carry out a specific task or process. They consist of interconnected neurons and glial cells, which provide structural and metabolic support.
Neuronal pools are collections of nerve cells with similar functions and interact through chemical and electrical signals. These pools include both interneurons (the central neural circuit nodes that...

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Video Experimental Relacionado

Updated: Jul 12, 2026

Multi-unit Recording Methods to Characterize Neural Activity in the Locust (Schistocerca Americana) Olfactory Circuits
12:13

Multi-unit Recording Methods to Characterize Neural Activity in the Locust (Schistocerca Americana) Olfactory Circuits

Published on: January 25, 2013

La codificación de la información olfativa con conjuntos neuronales oscilantes.

G Laurent, H Davidowitz

    Science (New York, N.Y.)
    |September 23, 1994
    PubMed
    Resumen

    Los diferentes olores activan conjuntos neuronales específicos y dinámicos en las langostas, lo que sugiere un mecanismo de codificación temporal para la información olfativa. Este conjunto dinámico de neuronas oscilantes puede apoyar el aprendizaje asociativo.

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    Área de la Ciencia:

    • La neurociencia es la neurociencia.
    • Investigación del sistema olfativo de investigación del sistema olfativo.
    • Las oscilaciones neuronales.

    Sus antecedentes:

    • Las oscilaciones rápidas en los potenciales de campo locales están vinculadas a la actividad neuronal rítmica.
    • Su papel en la codificación de la información dentro del cerebro, particularmente el sistema olfativo, sigue siendo objeto de debate.
    • Las observaciones anteriores se realizaron principalmente en el neocórtex.

    Objetivo del estudio:

    • Para investigar el papel de las oscilaciones neuronales en la codificación olfativa en el lóbulo antenal de la langosta y el cuerpo del hongo.
    • Para determinar si los olores evocan patrones específicos de las oscilaciones neuronales.
    • Para explorar la naturaleza dinámica de los conjuntos neuronales durante la percepción del olor.

    Principales métodos:

    • El potencial de campo local y las grabaciones intracelulares se realizaron en el cerebro de la langosta (Schistocerca americana).
    • Las grabaciones se analizaron durante la exposición a diferentes olores.
    • Se examinaron las fases de disparo neuronal y la dinámica del conjunto en relación con los estímulos olfativos.

    Principales resultados:

    • Diferentes olores indujeron oscilaciones coherentes en conjuntos neuronales distintos, pero superpuestos.
    • La fase de disparo de neuronas individuales en relación con el ritmo de la población fue independiente del olor.
    • La composición de los conjuntos neuronales oscilantes evolucionó durante la exposición sostenida al olor.

    Conclusiones:

    • Los odorantes están codificados por conjuntos específicos y dinámicos de neuronas que oscilan de manera coherente.
    • Esta representación distribuida y temporal de la información olfativa puede permitir la codificación combinatoria.
    • Los hallazgos sugieren un mecanismo para el aprendizaje asociativo en las redes sensoriales.