AI Summary

A long-held understanding of the brain's motor cortex has been challenged by an update to a 89-year-old model. The motor homunculus, a theoretical representation of the brain's motor control system, has been revised to reflect a more complex organization of brain cells. The motor cortex, a strip of brain tissue over the ears, was previously thought to contain a neatly organized map of the body. However, the updated model suggests that this is not the case. Brain cells responsible for movement are not laid out in a straightforward sequence, as previously believed. This revision has implications for our understanding of how the brain controls movement. The updated model may require neuroscientists to reevaluate their understanding of motor function and its relationship to the brain's motor cortex.

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