Video Experimental Relacionado
Updated: Jul 28, 2026
16:00
Behavioral Assessment of Manual Dexterity in Non-Human Primates
Published on: November 11, 2011
La representación mental de los movimientos de las manos después de un daño en la corteza parietal
A Sirigu1, J R Duhamel, L Cohen
1INSERM U-289, 47 Boulevard de l'Hôpital, 75013 Paris, France.
Science (New York, N.Y.)
|September 13, 1996
Resumen
La corteza parietal es crucial para generar representaciones de movimiento mental, lo que nos permite imaginar y predecir el momento de nuestras acciones. Este hallazgo destaca su papel en las simulaciones internas durante el control del motor.
Área de la Ciencia:
- La neurociencia es la neurociencia.
- Neurociencia cognitiva y neurociencia cognitiva.
- El control del motor es el control del motor.
Sus antecedentes:
- La neuroimagen revela una activación cerebral similar durante el ensayo mental y la ejecución de actos motores.
- Esto sugiere que las simulaciones internas son parte del control motor, pero las contribuciones específicas de las áreas cerebrales siguen sin estar claras.
Objetivo del estudio:
- Investigar el papel de la corteza parietal en la generación de representaciones del movimiento mental.
- Determinar la contribución de la corteza parietal a la predicción del tiempo de movimiento a través de imágenes mentales.
Principales métodos:
- Evaluó a los pacientes con lesiones de la corteza parietal en su capacidad para predecir la duración del movimiento utilizando imágenes mentales.
- Comparación del rendimiento de individuos sanos y de un paciente con daño en el área motora primaria.
Principales resultados:
- Los pacientes con corteza parietal mostraron deterioro selectivo en la predicción del tiempo de movimiento a través de imágenes mentales.
- Este déficit se observó tanto para los movimientos diferenciados de los dedos como para el señalamiento guiado visualmente.
Conclusiones:
- La corteza parietal es esencial para la capacidad de generar representaciones internas de los movimientos.
- Estos hallazgos subrayan la importancia de la corteza parietal en las imágenes motoras y la predicción.
Más Videos Relacionados
08:01Compensatory Limb Use and Behavioral Assessment of Motor Skill Learning Following Sensorimotor Cortex Injury in a Mouse Model of Ischemic Stroke
Published on: July 10, 2014
09:42Motor Imagery Brain-Computer Interface in Rehabilitation of Upper Limb Motor Dysfunction After Stroke
Published on: September 1, 2023
Videos de Conceptos Relacionados
01:33Somatosensation
The somatosensory system relays sensory information from the skin, mucous membranes, limbs, and joints. Somatosensation is more familiarly known as the sense of touch. A typical somatosensory pathway includes three types of long neurons: primary, secondary, and tertiary. Primary neurons have cell bodies located near the spinal cord in groups of neurons called dorsal root ganglia. The sensory neurons of ganglia innervate designated areas of skin called dermatomes.
01:14Motor and Sensory Areas of the Cortex
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.
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,...
01:10Higher Mental Functions of the Brain: Language
Language is a system of communication that allows the expression of thoughts, ideas, and feelings. The brain processes language in both hemispheres.
Language formation and comprehension take place in the dominant hemisphere. The dominant hemisphere is responsible for understanding the meaning of spoken, written, or sign language, as well as the ability to communicate. For most people, the left hemisphere is the dominant one. The right hemisphere, then, gives tone and emotional context to the...
Language formation and comprehension take place in the dominant hemisphere. The dominant hemisphere is responsible for understanding the meaning of spoken, written, or sign language, as well as the ability to communicate. For most people, the left hemisphere is the dominant one. The right hemisphere, then, gives tone and emotional context to the...
01:23Somatosensory, Motor, and Association Cortex
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 the...
01:14Role of Cerebellum and Prefrontal Cortex in Memory
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 cerebellum's...