Video Experimental Relacionado
Updated: Feb 12, 2026
07:42
Combined Transcranial Magnetic Stimulation and Electroencephalography of the Dorsolateral Prefrontal Cortex
Published on: August 17, 2018
12.5K
Los pacientes con inestabilidad crónica del tobillo muestran un aumento de la corteza sensorimotora, la corteza
Huimin Xie1, Xuejiao Li1,2, Zihan Wang1,3
1Department of Rehabilitation, the First Medical Center, Chinese PLA General Hospital, Beijing, China.
Frontiers in human neuroscience
|February 11, 2026
Resumen
Los pacientes con inestabilidad crónica del tobillo (IAC) muestran un peor equilibrio y una mayor actividad cerebral, especialmente cuando la visión está deteriorada. Esto sugiere una neurofisiología alterada en el control del equilibrio, detectable con espectroscopia funcional de infrarrojo cercano y sensores inerciales.
Área de la Ciencia:
- La neurociencia es la neurociencia.
- La biomecánica es la biomecánica.
- La ortopedia es la ortopedia.
Sus antecedentes:
- La inestabilidad crónica del tobillo (CAI) está relacionada con los déficits de equilibrio, pero el papel de la plasticidad cortical en el control del equilibrio no se entiende bien.
- Comprender los cambios neurofisiológicos en la IAC es crucial para desarrollar intervenciones específicas.
Objetivo del estudio:
- Para comparar la actividad cortical y el control del equilibrio entre individuos con CAI y controles sanos durante la postura de una sola pierna.
- Para investigar la relación entre las señales de flujo sanguíneo cerebral y el rendimiento de equilibrio en CAI.
Principales métodos:
- Un estudio de cohorte en el que participaron 30 pacientes con IAC y 30 controles sanos.
- La espectroscopia funcional de infrarrojo cercano (fNIRS) midió la actividad cortical en la corteza sensorimotora (SMC), la corteza prefrontal dorsolateral (DLPFC) y el giro temporal superior (STG).
- Los sensores de inercia portátiles evaluaron el movimiento y la aceleración del centro de masa (COM), junto con las pruebas de equilibrio funcional.
Principales resultados:
- Los pacientes con CAI demostraron una capacidad de equilibrio reducida y un mayor sesgo COM en comparación con los controles.
- Se observó un aumento significativo de la actividad cortical (ΔHbO2) en SMC bilateral, DLPFC y STG en pacientes con CAI.
- Se encontraron correlaciones entre los parámetros de equilibrio (RMS-ML, Acc_max-ML) y la actividad de STG, especialmente cuando la visión era limitada.
Conclusiones:
- La IAC se asocia con un deterioro del equilibrio y una activación cortical bilateral alterada, independientemente de la extremidad de postura.
- La actividad cerebral mejorada se correlaciona con la dinámica alterada de la COM, destacando los cambios neuroplásticos en el control del equilibrio.
- fNIRS y los sensores de inercia detectan efectivamente los déficits de equilibrio en pacientes con IAC.
Palabras clave:
El equilibrio es el equilibrio del equilibrio.Inestabilidad crónica del tobillo.la corteza prefrontal dorsolateral y la corteza prefrontal dorsolateral.espectroscopia de infrarrojo cercano funcional.La corteza sensoriomotriz es la corteza sensoriomotriz.posición de una sola pierna.El giro temporal superior es el giro temporal superior.Más Videos Relacionados
07:52Evaluating Postural Control and Lower-extremity Muscle Activation in Individuals with Chronic Ankle Instability
Published on: September 18, 2020
9.1K
13:20Online Repetitive Transcranial Magnetic Stimulation of Dorsomedial and Dorsolateral Prefrontal Cortex in Cognition Decision Making, and Cognitive Dissonance
Published on: December 5, 2025
996
Videos de Conceptos Relacionados
01:14Role of Cerebellum and Prefrontal Cortex in Memory
1.2K
The cerebellum, while traditionally associated with motor control, also plays a crucial role in memory, particularly in procedural memory, which involves learning motor tasks that become automatic through repetition. For example, studies have shown that when the cerebellum is damaged, individuals or animals lose the ability to learn conditioned motor responses, such as the conditioned eye-blink response in classical conditioning experiments with rabbits. This study demonstrates the...
1.2K
01:21Association Areas of the Cortex
9.5K
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,...
9.5K
01:14Motor and Sensory Areas of the Cortex
7.7K
The cerebral cortex, the brain's outermost layer, is pivotal in processing complex cognitive tasks, emotions, and various sensory inputs and executing voluntary motor activities. This intricate structure is divided into three primary functional areas: the motor areas, sensory areas, and association areas.
Motor Areas
The motor areas located in the frontal lobe are central to controlling voluntary movements. This region is further subdivided into the primary motor cortex and the premotor cortex....
Motor Areas
The motor areas located in the frontal lobe are central to controlling voluntary movements. This region is further subdivided into the primary motor cortex and the premotor cortex....
7.7K
01:18Increasing Function
401
An increasing function exhibits a rise in output values as input values increase. This behavior is depicted graphically as a curve or line that slopes upward from left to right. Such a function satisfies the condition that if x1 < x2, then f(x1) < f(x2), indicating that the function values grow with increasing inputs. This concept is fundamental in understanding growth trends across various domains, such as population dynamics, financial investments, or resource consumption.The...
401
01:09Infrared (IR) Spectroscopy: Overview
5.2K
When electromagnetic radiation passes through a material, atoms or molecules transition from a lower to a higher energy state by absorbing radiation corresponding to the energy difference between the two states. The absorption of infrared (IR) radiation causes transitions between vibrational energy levels in a molecule. Therefore, IR spectroscopy is a useful analytical tool for determining the molecular structure of molecules.
Different compounds display unique properties due to their...
Different compounds display unique properties due to their...
5.2K
01:23Somatosensory, Motor, and Association Cortex
2.8K
The somatosensory cortex in the parietal lobes is crucial for interpreting sensory data such as touch, temperature, and proprioception. The somatosensory cortex, situated in the parietal lobes, plays a vital role in interpreting sensory information like touch, temperature, and proprioception—awareness of body position. This specialized brain region features an organized structure wherein neurons at the top primarily process sensations originating from the lower body. In contrast, those at...
2.8K