Video Experimental Relacionado
Updated: Sep 9, 2025
11:02
Vagus Nerve Stimulation as a Tool to Induce Plasticity in Pathways Relevant for Extinction Learning
Published on: August 21, 2015
23.6K
Las entradas talamicas paraventriculares al pálido ventral buscan recompensa durante la amenaza y el miedo responden
Mahsa Moaddab1, Suhui Qian1, Jacob B Boyce1
1Department of Psychology and Neuroscience, Boston College.
Behavioral neuroscience
|September 2, 2025
Resumen
Las vías neuronales en el cerebro
Área de la Ciencia:
- La neurociencia
- Neurociencia del comportamiento
- El comportamiento de los animales
Sus antecedentes:
- El comportamiento adaptativo requiere equilibrar el miedo y la búsqueda de la recompensa.
- Las amenazas ambientales a menudo ocurren durante la adquisición de recursos.
- El pálido ventral (VP) y el núcleo tálamo paraventricular (PVT) están implicados en el procesamiento de amenazas y recompensas.
Objetivo del estudio:
- Investigar el papel de la vía VP y PVT → VP en la modulación del comportamiento de miedo y recompensa.
- Examinar cómo las deleciones neuronales en estas vías afectan la extinción del miedo.
Principales métodos:
- Las ratas se sometieron a deleciones neuronales locales de la vía VP o PVT → VP.
- Se utilizó un procedimiento de supresión condicionada, presentando señales que predecían el impacto del pie durante la búsqueda de la recompensa.
- Se evaluaron las respuestas al miedo y la recuperación del shock.
Principales resultados:
- Las deleciones de la vía VP o PVT → VP facilitaron la recuperación del choque del pie.
- La eliminación de VP mejoró la respuesta de extinción del miedo.
- PVT → VP eliminación de la vía dentro de la reducción del miedo de la sesión.
Conclusiones:
- El VP y sus entradas PVT son cruciales para moldear el comportamiento de búsqueda de recompensa bajo amenaza.
- Estos circuitos neuronales juegan un papel importante en la regulación de los procesos de extinción del miedo.
Videos de Conceptos Relacionados
01:30Diencephalon: Anatomical Regions
2.9K
The diencephalon, etymologically translated as 'through brain,' plays an integral role as the conduit between the cerebrum and the vast extent of the nervous system. However, the olfactory system is an exception, as it interfaces directly with the cerebrum. The diencephalon, deeply ensconced beneath the cerebrum, primarily consists of three paired structures — the thalamus, hypothalamus, and epithelamus. It also includes accessory structures such as the subthalamus, which houses the...
2.9K
01:15Functional Brain Systems: Limbic System
3.8K
The limbic system, often called the "emotional brain," is a complex set of structures located deep within the brain. The intricate network of the limbic system supports a wide range of psychological functions, from emotional regulation to memory formation and sensory processing. This functional brain region encompasses specific parts of the diencephalon and the cerebrum, integrating the higher mental functions of the cerebral cortex with the primitive emotional responses of the deep brain...
3.8K
01:27Diencephalon: Thalamus and Information Relay
2.2K
The thalamus, often called “the gateway to the cerebral cortex,” is vital in processing and directing sensory and motor signals throughout the brain. Almost all inputs destined for the cerebral cortex, except for olfactory signals, are relayed through the thalamus. The thalamus is a sophisticated relay station, channeling information from various brain regions to the cerebral cortex, as well as a filter, prioritizing certain signals over others based on current physiological...
2.2K
01:23Diencephalon: Hypothalamus and Coordination
2.2K
The hypothalamus is a small yet highly complex and essential brain region that plays a crucial role in regulating various bodily functions. Anatomically, it is located at the base of the brain, just above the brainstem and below the thalamus, forming part of the limbic system.
The hypothalamus interacts with other brain regions, including the pituitary gland, through a direct physical connection called the hypothalamic-pituitary axis. The hypothalamus receives somatic and visceral inputs and...
The hypothalamus interacts with other brain regions, including the pituitary gland, through a direct physical connection called the hypothalamic-pituitary axis. The hypothalamus receives somatic and visceral inputs and...
2.2K
01:16Role of Amygdala in Memory
390
The amygdala is a small, almond-shaped structure responsible for processing and storing memories, particularly those linked to emotions like fear and stress. It plays an essential role in the brain's response to emotionally significant events and often enhances memory formation by triggering stress hormone release. The amygdala is vital for encoding and retrieving memories associated with fear or stress, a process that is adaptive by helping organisms avoid dangerous situations.
One of the...
One of the...
390
01:14Conditioned Taste Aversion
228
Conditioned taste aversion, also known as sauce béarnaise syndrome, is a phenomenon in which an individual develops an aversion to a certain food taste following a negative experience, typically illness. This form of aversion is a type of classical conditioning in which the taste of the food (conditioned stimulus, CS) is associated with the experience of illness (unconditioned stimulus, UCS).
A notable characteristic of conditioned taste aversion is that it often requires only a single...
A notable characteristic of conditioned taste aversion is that it often requires only a single...
228