Video Experimental Relacionado
Updated: Aug 5, 2026
08:45
Mapping Cortical Dynamics Using Simultaneous MEG/EEG and Anatomically-constrained Minimum-norm Estimates: an Auditory Attention Example
Published on: October 24, 2012
Una representación neuronal de la ubicación de los sonidos cercanos
M S Graziano1, L A Reiss, C G Gross
1Department of Psychology, Princeton University, New Jersey 08544, USA. graziano@princeton.edu
Nature
|February 16, 1999
Resumen
Los científicos descubrieron neuronas en los monos macacos.
Área de la Ciencia:
- La neurociencia es la neurociencia.
- La percepción auditiva es la percepción auditiva.
- Navegación espacial para la navegación espacial.
Sus antecedentes:
- Los seres humanos pueden determinar con precisión la ubicación de la fuente de sonido, incluida la distancia.
- Los mecanismos auditivos de percepción de distancia son poco conocidos.
- La codificación neuronal de la distancia auditiva es en gran medida desconocida, a diferencia de la dirección del sonido.
Objetivo del estudio:
- Investigar las representaciones neuronales del espacio auditivo cerca de la cabeza.
- Identificar las regiones cerebrales involucradas en la percepción auditiva de la distancia.
- Caracteriza las neuronas que codifican el espacio auditivo de campo cercano.
Principales métodos:
- Se registró la actividad neuronal en monos macaco (Macaca fascicularis).
- Centrado en las neuronas en la corteza premotora ventral.
- Mapeo de los campos receptivos espaciales de las neuronas auditivas.
Principales resultados:
- Neuronas identificadas que representan el espacio auditivo dentro de aproximadamente 30 cm de la cabeza.
- Estas neuronas están localizadas en la corteza premotora ventral.
- Las neuronas exhiben campos receptivos espaciales que se extienden hacia afuera desde la cabeza.
Conclusiones:
- La corteza premotora ventral contiene neuronas que codifican el espacio auditivo de campo cercano.
- Estos hallazgos ofrecen información sobre las bases neuronales de la percepción auditiva de la distancia.
- Esta investigación arroja luz sobre cómo el cerebro procesa los sonidos cercanos al cuerpo.
Videos de Conceptos Relacionados
01:31Hearing
When we hear a sound, our nervous system is detecting sound waves—pressure waves of mechanical energy traveling through a medium. The frequency of the wave is perceived as pitch, while the amplitude is perceived as loudness.
01:22Hair Cells
Hair cells are the sensory receptors of the auditory system—they transduce mechanical sound waves into electrical energy that the nervous system can understand. Hair cells are located in the organ of Corti within the cochlea of the inner ear, between the basilar and tectorial membranes. The actual sensory receptors are called inner hair cells. The outer hair cells serve other functions, such as sound amplification in the cochlea, and are not discussed in detail here.
01:13The 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.
01:21Association Areas of the Cortex
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,...
01:15Auditory 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...
When viewed cross-sectionally, the cochlea reveals the scala vestibuli and scala tympani flanking the...
01:21Perceiving Loudness, Pitch, and Location
The human brain perceives pitch through two primary mechanisms reflected in place theory and frequency theory. Each mechanism describes how sound waves are interpreted as specific pitches by the brain, offering insights into the intricate processes of auditory perception.
Place theory, or place coding, suggests that different pitches are heard because various sound waves activate specific locations along the cochlea's basilar membrane. The brain determines the pitch of a sound by identifying...
Place theory, or place coding, suggests that different pitches are heard because various sound waves activate specific locations along the cochlea's basilar membrane. The brain determines the pitch of a sound by identifying...