Video Experimental Relacionado
Updated: Jul 17, 2026
12:29
Coherence between Brain Cortical Function and Neurocognitive Performance during Changed Gravity Conditions
Published on: May 23, 2011
Correlatos neurofisiológicos discretos en la corteza prefrontal durante el trastorno de movimiento histérico y
Lancet (London, England)
|April 19, 2000
Resumen
Se necesita una validación objetiva para diferenciar los síntomas histéricos de las condiciones fingidas. La neuroimagen funcional reveló patrones neuronales distintos para estos trastornos, ayudando a la distinción clínica.
Área de la Ciencia:
- La neurociencia es la neurociencia.
- La psiquiatría es la psiquiatría.
- Psicología Clínica Psicología clínica.
Sus antecedentes:
- Los síntomas histéricos y las condiciones fingidas presentan desafíos diagnósticos.
- Se requieren métodos objetivos para diferenciar estas condiciones.
Objetivo del estudio:
- Investigar los correlatos neuronales que distinguen los síntomas histéricos de los trastornos fingidos.
- Proporcionar una validación objetiva para la diferenciación clínica.
Principales métodos:
- Se emplearon técnicas de neuroimagen funcional.
- Los patrones de actividad neuronal se analizaron durante tareas o condiciones específicas.
Principales resultados:
- Se identificaron patrones distintos de actividad cerebral entre los síntomas histéricos y los trastornos fingidos.
- Las regiones específicas del cerebro mostraron un compromiso diferencial en cada condición.
Conclusiones:
- La neuroimagen funcional ofrece marcadores objetivos para diferenciar los síntomas histéricos de las condiciones fingidas.
- Estos hallazgos apoyan el uso de la neuroimagen en el diagnóstico de trastornos somatoformes y ficticios.
Videos de Conceptos Relacionados
01:16Accessory Structures of the Skin: Hair and Hair Follicles
Hair and hair follicles are integral components of the integumentary system. Hair is a filamentous structure composed mainly of a protein called keratin. It is found on the surface of the skin throughout the body, except for areas such as the palms of the hands and soles of the feet.
Hair is a keratinous filament growing out of the epidermis. It is primarily made of dead, keratinized cells. Hair strands originate at the epidermal penetration called the hair follicle. The hair shaft is the part...
Hair is a keratinous filament growing out of the epidermis. It is primarily made of dead, keratinized cells. Hair strands originate at the epidermal penetration called the hair follicle. The hair shaft is the part...
01:15Neurogenesis and Regeneration of Nervous Tissue
In the CNS, neurogenesis, the birth of new neurons from stem cells, is limited to the hippocampus in adults. In other regions of the brain and spinal cord, neurogenesis is almost non-existent due to inhibitory influences from neuroglia, especially oligodendrocytes, and the absence of growth-stimulating cues. The myelin produced by oligodendrocytes in the CNS inhibits neuronal regeneration. Furthermore, astrocytes proliferate rapidly after neuronal damage, forming scar tissue that physically...
01:28Major 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...
01:26Spinal Cord
The spinal cord, a critical component of the central nervous system, extends from the base of the brainstem to the lumbar region of the vertebral column. It is essential for maintaining physical stability and facilitating communication between the brain and peripheral parts of the body.
01:14Spinal Cord Injury ll: Pathophysiology
Spinal cord injury progresses through two interconnected phases: primary injury and secondary injury.Primary InjuryPrimary injury happens at the moment of trauma and involves immediate mechanical damage to the spinal cord.Compression happens when broken vertebrae, herniated discs, or accumulating blood (such as a hematoma) press directly against the spinal cord, distorting its normal shape and function. In cases of contusion, the cord is bruised by a blunt force (like penetrating injuries or...
01:25Secondary Spinal Cord Injury llI: Pathophysiology
Early Ischemia and Ionic ImbalanceWithin minutes of spinal cord injury, a secondary cascade begins, progressing over hours to weeks. Vascular damage reduces blood flow, causing ischemia and mitochondrial dysfunction. ATP depletion leads to ion pump failure, membrane depolarization, sodium influx, potassium efflux, and water accumulation, resulting in cellular swelling. Increased intracellular calcium further disrupts mitochondria and accelerates cellular injury.Excitotoxicity and Neuronal...