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Consolidación temprana en la corteza motora primaria humana.

Wolf Muellbacher¹, Ulf Ziemann, Joerg Wissel

¹Human Motor Control Section, Medical Neurology Branch, National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bldg 10, Rm 5N226, 10 Center Drive MSC 1428, Bethesda, Maryland 20892-1428, USA.

|January 25, 2002

Resumen

La corteza motora primaria (M1) es crucial para la consolidación temprana de las habilidades motoras. La interrupción de M1 afecta específicamente a la retención de habilidades, no al aprendizaje o recuerdo inicial.

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Área de la Ciencia:

La neurociencia es la neurociencia.
El control del motor es el control del motor.
Psicología Cognitiva Psicología cognitiva.

Sus antecedentes:

La adquisición de habilidades motoras implica una rápida consolidación y reclutamiento de nuevas regiones cerebrales.
El papel específico de la corteza motora primaria (M1) en la consolidación temprana de las habilidades motoras sigue sin estar claro.

Objetivo del estudio:

Investigar el papel esencial de la corteza motora primaria humana (M1) en la consolidación temprana de las habilidades motoras recién adquiridas.

Principales métodos:

Los sujetos practicaron movimientos rápidos de los dedos para mejorar la aceleración y la fuerza.
La estimulación magnética transcraneal repetitiva de baja frecuencia (rTMS) se aplicó a M1 y otras áreas del cerebro.
Se monitorearon los cambios de comportamiento en el rendimiento motor, el aprendizaje y la retención.

Principales resultados:

rTMS de M1 interrumpió específicamente la retención de mejoras conductuales en las habilidades motoras.
La estimulación M1 no afectó el comportamiento motor basal, el desempeño inicial de la tarea, el aprendizaje posterior o el recuerdo de habilidades.
La estimulación de otras áreas cerebrales no afectó la retención de habilidades.

Conclusiones:

La corteza motora primaria humana (M1) está específicamente involucrada durante la etapa temprana de la consolidación motora.
M1 juega un papel crítico y limitado en el tiempo para estabilizar las habilidades motoras recién adquiridas antes de la consolidación completa.