Video Experimental Relacionado
Updated: Aug 15, 2026

09:35
Subcutaneous Trigeminal Nerve Field Stimulation for Refractory Facial Pain
Published on: May 10, 2017
Los sustratos trigéminos de la autoestimulación intracraneal en el tronco encefálico
Resumen
Se exploraron los mecanismos de refuerzo del tronco cerebral utilizando la autoestimulación intracraneal en ratas. Los hallazgos sugieren que la modulación de las motoneuronas del trigémino juega un papel clave en las vías de recompensa.
Área de la Ciencia:
- La neurociencia es la neurociencia.
- Neurociencia del comportamiento neurológico.
Sus antecedentes:
- La autoestimulación intracraneal (ICSS) es una herramienta clave para el estudio de las vías de recompensa.
- El papel del tronco cerebral en el refuerzo no se entiende completamente.
Objetivo del estudio:
- Para investigar el papel del núcleo motor del trigémino en la autoestimulación.
- Para explorar posibles mecanismos de refuerzo del tronco cerebral.
Principales métodos:
- Las ratas se sometieron a autoestimulación intracraneal a través de electrodos en el núcleo motor del trigémino.
- Se realizaron experimentos de control para descartar los artefactos motores.
Principales resultados:
- La autoestimulación fue provocada con éxito desde el núcleo motor del trigémino.
- Se observaron movimientos de la mandíbula de rebote en los sitios de estimulación.
- Se confirmó que presionar la palanca no es un artefacto motor.
Conclusiones:
- La modulación de las motoneuronas del trigémino puede ser un mecanismo de refuerzo significativo.
- El tronco encefálico, específicamente el núcleo motor trigémino, está implicado en el procesamiento de la recompensa.
Videos de Conceptos Relacionados
Diencephalon: Thalamus and Information Relay
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 states or needs.
Brainstem
The brainstem, located inferior to the brain and superior to the spinal cord, serves as a bridge between the cerebrum and the spinal cord. It plays a vital role in relaying information and controlling critical life functions. It comprises three primary regions: the midbrain, pons, and medulla oblongata.
The Midbrain
The midbrain is located beneath the diencephalon and connects the cerebrum with the lower parts of the brain. The cerebral peduncles are prominent midbrain structures that house the...
The Midbrain
The midbrain is located beneath the diencephalon and connects the cerebrum with the lower parts of the brain. The cerebral peduncles are prominent midbrain structures that house the...
Brainstem: Control Centers of Medulla
The medulla oblongata is a crucial part of the brainstem responsible for controlling various autonomic and involuntary functions. It contains several nuclei, including the olivary, cuneate, gracile, and solitary nuclei.
Olivary Nucleus
The olivary nucleus, or inferior olivary nucleus, is located within the ventrolateral part of the medulla oblongata. It is primarily involved in motor coordination and motor learning. The olivary nucleus receives input from the spinal cord, cerebellum, and motor...
Olivary Nucleus
The olivary nucleus, or inferior olivary nucleus, is located within the ventrolateral part of the medulla oblongata. It is primarily involved in motor coordination and motor learning. The olivary nucleus receives input from the spinal cord, cerebellum, and motor...
Major Somatic Sensory Pathways
Sensory impulses related to touch, pressure, vibration, and proprioception from various body parts, such as the limbs, trunk, neck, and posterior head, travel to the cerebral cortex through the posterior column-medial lemniscus pathway. The pathway’s name derives from the two white-matter tracts that convey the impulses: the spinal cord's posterior column and the brainstem's medial lemniscus. First-order sensory neurons extend their axons into the spinal cord, forming the posterior columns...
Indirect Motor Pathways
The indirect motor or extrapyramidal pathways originate in the brainstem, the lower portion of the brain that connects it to the spinal cord. They consist of several distinct tracts, each with specialized functions. The four main tracts of the indirect motor pathways are the vestibulospinal tract, the reticulospinal tract, the tectospinal tract, and the rubrospinal tract.
The vestibulospinal tract originates in the vestibular nuclei of the brainstem. The vestibular system detects changes in...
The vestibulospinal tract originates in the vestibular nuclei of the brainstem. The vestibular system detects changes in...
Cranial Part of Parasympathetic Division
The cranial part of the parasympathetic division plays a crucial role in regulating the visceral functions of the head and specific structures in the neck, thoracic, and abdominopelvic cavities. Preganglionic fibers of the parasympathetic division exit the brain through cranial nerves III (oculomotor), VII (facial), IX (glossopharyngeal), and X (vagus), delivering parasympathetic output to the respective visceral structures.
The vagus nerve (cranial nerve X) alone accounts for approximately 75...
The vagus nerve (cranial nerve X) alone accounts for approximately 75...

