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Las interneuronas espinales de primates muestran actividad de retardo instruida antes del movimiento.

Y Prut1, E E Fetz

  • 1Department of Physiology & Biophysics and the Regional Primate Research Center, University of Washington, Seattle 98195, USA. yifat@u.washington.edu

Nature
|October 19, 1999
PubMed
Resumen

Los investigadores descubrieron actividad neuronal preparatoria en las interneuronas espinales antes de la ejecución del movimiento. Esto sugiere una preparación motora generalizada, que implica tanto la preparación como la inhibición dentro de la médula espinal.

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Área de la Ciencia:

  • La neurociencia es la neurociencia.
  • El control del motor es el control del motor.
  • Fisiología de la médula espinal fisiología de la médula espinal

Sus antecedentes:

  • La actividad neuronal preparatoria antes del movimiento se conoce en los centros motores supraspinarios durante los períodos de retraso instruidos.
  • Esta actividad se correlaciona con los parámetros de movimiento, pero su papel en la configuración de la salida del motor no está claro.

Objetivo del estudio:

  • Para investigar si las interneuronas espinales exhiben actividad de retardo preparatoria.
  • Para entender la naturaleza y la función de esta actividad preparatoria de la columna vertebral.

Principales métodos:

  • Grabaciones electrofisiológicas en las interneuronas espinales durante una tarea de movimiento retrasado.
  • Análisis de la actividad neuronal durante el período de retraso instruido y posterior ejecución del movimiento.

Principales resultados:

  • Las interneuronas espinales muestran una actividad temprana de retraso previo al movimiento, distinta de sus respuestas relacionadas con el movimiento.
  • Esta actividad de retraso espinal se asemeja a la actividad relacionada con el juego en las áreas supraspinarias.
  • Se identificaron dos procesos espinales: el priming de la red motora y la inhibición global superpuesta.

Conclusiones:

  • La preparación para el movimiento ocurre simultáneamente en regiones extensas, incluida la médula espinal.
  • La actividad preparatoria espinal implica tanto la preparación de las redes motoras como la supresión de la producción muscular.
  • Esto pone de relieve un doble papel para los circuitos espinales en la preparación y el control de la ejecución del movimiento.