Awake brain surgery helps show how the brain groups muscles to move
Original title: Neuromotor modules revealed by direct electrical stimulation of the human primary motor cortex.
How far along is this research?
- Lab cells
- Animals
- Review
- Tested in people
This was tested in people. That is the most reliable kind of research we share.
This is basic research on how the brain moves muscles, not a treatment.
The short version
During awake tumor surgery, doctors found signs that the brain moves muscles in teams.
What was studied. Researchers studied 13 people having awake surgery to remove a glioma: A tumor that starts in the glial cells, the support cells of the brain and spinal cord. Gliomas are given a grade from 1 to 4 describing how the tumor is expected to behave. See the glossary, a type of brain tumor. Surgeons gave small electric pulses to the part of the brain that controls movement, and the team watched which arm muscles worked together.
What they found. Before surgery, the team recorded arm muscles working together in groups when patients moved on their own. In all, 69% of these muscle groups matched groups set off by the brain pulses, alone or combined. Different kinds of muscle groups also seemed to come from different spots in the brain's movement area.
What this means, and what it doesn't
What it could mean: This gives scientists a clearer picture of how the brain tells muscles to work together. It suggests the brain's movement area may have two parts that work in different ways. It does not change care for patients right now.
What it doesn't mean: This is not a new treatment for brain tumors, and it is not a cure. It is basic research on how the brain works, done with only 13 people. It does not change how gliomas are treated today.
Source: PubMed, September 8, 2026 · Read the original
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