The article describes a study that used advanced imaging techniques to map the human
motor cortex and identify how different brain regions work together during voluntary
movements. The researchers found that the motor cortex is not organized into a simple
homunculus, as previously believed, but is instead divided into two networks: a “sematocognitive action network” involved in planning and coordinating movements with a broader
cognitive context, and an “effector network” that is responsible for executing specific
movements. These networks are connected and work together to produce purposeful action.
The findings have implications for understanding how the brain controls movement and how
it may be impacted by neurological disorders.
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