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Measuring and Manipulating Functionally Specific Neural Pathways in the Human Motor System with Transcranial Magnetic Stimulation
Published on: February 23, 2020
Relación de las neuronas en la corteza motora no primaria con el movimiento bilateral de la mano
Nature
|June 18, 1987
Resumen
Los investigadores compararon la actividad neuronal en la corteza motora no primaria y primaria durante una tarea motora entrenada. Las neuronas de la corteza motora no primaria mostraron actividad relacionada con la elección del movimiento, a diferencia de las neuronas de la corteza motora primaria, lo que indica un control motor de mayor nivel.
Área de la Ciencia:
- La neurociencia es la neurociencia.
- Investigación de la corteza motora de los primates.
- Mecanismos de control del motor Mecanismos de control del motor
Sus antecedentes:
- La corteza cerebral de los primates contiene múltiples campos motores no primarios, organizados somatotópicamente, anteriores al área motora primaria.
- Comprender las distintas funciones de estas representaciones motoras es crucial para descifrar las jerarquías de control motor.
Objetivo del estudio:
- Para comparar la actividad neuronal en los campos de la corteza motora no primaria y primaria durante una tarea motora entrenada que involucra movimientos unilaterales y bilaterales de la mano.
- Para aclarar los roles funcionales de las diferentes áreas de la corteza motora en la planificación y ejecución motora.
Principales métodos:
- Registros electrofisiológicos de la actividad neuronal en la corteza motora no primaria y primaria de los primates.
- Análisis de los patrones de disparo neuronal durante una tarea motora entrenada que requiere el uso de la mano derecha, izquierda o ambas manos.
Principales resultados:
- La actividad neuronal en la corteza motora no primaria estaba relacionada con el movimiento elegido por el animal.
- En contraste, la actividad neuronal de la corteza motora primaria se correlacionó principalmente con la actividad muscular contralateral.
- Esto sugiere una diferencia en el nivel jerárquico de procesamiento motor entre estas áreas.
Conclusiones:
- La corteza motora no primaria está involucrada en la codificación de orden superior de la lateralidad de la respuesta motora.
- La corteza motora no primaria ejerce el control motor en un nivel jerárquico más alto que la corteza motora primaria.
- Estos hallazgos resaltan los roles especializados de distintas regiones corticales motoras en el comportamiento motor complejo.
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