Video Experimental Relacionado
Updated: Jun 2, 2025
19:44
A Tactile Automated Passive-Finger Stimulator TAPS
Published on: June 3, 2009
13.6K
Los bordes táctiles y el movimiento a través de la microestimulación patronizada de la corteza somatosensorial humana
Giacomo Valle1,2, Ali H Alamri3, John E Downey1
1Department of Organismal Biology and Anatomy, University of Chicago, Chicago, IL, USA.
Science (New York, N.Y.)
|January 17, 2025
Resumen
Los investigadores mejoraron el sentido del tacto para las personas con parálisis utilizando microestimulación intracortical (ICMS) para crear sensaciones táctiles. Este avance mejora el uso de manos biónicas controladas por el cerebro al proporcionar una mejor retroalimentación de interacción con objetos.
Área de la Ciencia:
- La neurociencia
- Ingeniería biomédica
- Tecnología de rehabilitación
Sus antecedentes:
- La microestimulación intracortical (ICMS) puede evocar sensaciones táctiles pero actualmente ofrece un sentido del tacto imperfecto.
- Las limitaciones de la tecnología actual de ICMS dificultan la destreza manual y la experiencia táctil de los usuarios.
- Comprender la codificación neural de las características táctiles en la corteza somatosensorial primaria (S1) es crucial para mejorar la retroalimentación sensorial.
Objetivo del estudio:
- Mejorar la retroalimentación táctil para personas con parálisis mediante el desarrollo de técnicas avanzadas de ICMS.
- Permitir a los usuarios percibir la geometría del objeto local y el movimiento aparente a través de sensaciones táctiles artificiales.
- Para mejorar la funcionalidad y la experiencia del usuario de manos biónicas controladas por el cerebro.
Principales métodos:
- Entrega simultánea de ICMS a través de electrodos con campos proyectados con patrones espaciales (PF) para evocar sensaciones de borde.
- Creación de PF complejos capaces de codificar formas táctiles arbitrarias y patrones de hendidura de la piel.
- Aplicación de ICMS con patrones espaciotemporales para generar sensaciones controladas de movimiento a través de la piel.
Principales resultados:
- Con éxito evocó sensaciones de bordes y formas táctiles complejas usando ICMS con patrones.
- Percepción controlada del movimiento a través de la piel, incluida la velocidad y la dirección ajustables.
- Mejoró significativamente la experiencia táctil de los individuos y su capacidad para utilizar manos biónicas controladas por el cerebro.
Conclusiones:
- Las técnicas avanzadas de ICMS pueden transmitir eficazmente información táctil compleja, incluida la forma y el movimiento.
- Este enfoque tiene un potencial significativo para restaurar un sentido del tacto más natural en personas con discapacidades sensoriales.
- Los métodos desarrollados mejoran las capacidades de los dispositivos neuroprótesis, lo que conduce a mejores resultados funcionales.
Videos de Conceptos Relacionados
01:33Somatosensation
36.4K
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.
36.4K
01:11Sensory Perception: Organization of the Somatosensory System
2.8K
The somatosensory system is the central and peripheral nervous system component that senses and processes touch, pressure, pain, temperature, and body position or proprioception. The process of sensation takes place at three levels:
The receptor level:
The receptor level is the first stage of sensation. It involves the detection of a stimulus by specialized sensory receptors. The stimulus must arrive within the receptor's receptive field. Next, the receptor converts the energy of the...
The receptor level:
The receptor level is the first stage of sensation. It involves the detection of a stimulus by specialized sensory receptors. The stimulus must arrive within the receptor's receptive field. Next, the receptor converts the energy of the...
2.8K
01:16Sensory Functions of the Skin
4.5K
The skin is the largest organ of the human body and plays a crucial role in our sensory perception. It contains a vast network of sensory receptors that contribute to the skin's protective function by perceiving physical, biological, and environmental cues and generating relevant responses.
There are two main categories of receptors on the skin: capsulated and non-capsulated. The non-capsulated ones are mainly the pain receptors. The capsulated ones can be further categorized based on the...
There are two main categories of receptors on the skin: capsulated and non-capsulated. The non-capsulated ones are mainly the pain receptors. The capsulated ones can be further categorized based on the...
4.5K
01:24Somatosensory, Motor, and Association Cortex
391
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...
391
01:29Overview of Somatic Sensory Pathways
4.1K
Somatic sensory or somatosensory pathways refer to the neural pathways that carry information related to touch, pressure, pain, temperature, and proprioception from the skin, muscles, tendons, and joints to the brain. These pathways involve several stages of processing and integration of sensory information.
The somatosensory system is divided into three main pathways: the dorsal (or posterior) column-medial lemniscus, spinothalamic (or anterolateral), and spinocerebellar pathways.
The dorsal...
The somatosensory system is divided into three main pathways: the dorsal (or posterior) column-medial lemniscus, spinothalamic (or anterolateral), and spinocerebellar pathways.
The dorsal...
4.1K
01:27Tactile and Chemical Senses
278
Tactile senses encompass touch, temperature, and pain, each mediated by specific receptors. Touch receptors detect mechanical energy or pressure against the skin. Sensory fibers from these receptors enter the spinal cord and relay information to the brain stem. Here, most fibers cross over to the opposite side of the brain. The touch information then moves to the thalamus, which projects a map of the body's surface onto the somatosensory areas of the parietal lobes in the cerebral cortex.
278