Awake and asleep brain mapping gave similar results in glioma surgery
Original title: Motor mapping to enable resections of peri-rolandic diffuse gliomas.
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.
Both of these mapping methods are already used in brain tumor surgery today.
The short version
Two ways of protecting movement during brain tumor surgery led to similar results for patients.
What was studied. Doctors at one hospital looked back at 130 people who had surgery for a glioma: A tumor that starts in the glial cells, the support cells of the brain and spinal cord. Gliomas are graded 1 to 4 by how fast they tend to grow. See the glossary near the part of the brain that controls movement. During surgery, the team mapped that area to avoid harming it. 54 people were awake for the mapping. 76 were asleep.
What they found. Three months after surgery, new or worse brain and nerve problems were uncommon in both groups. The rate was 5.6% in the awake group and 5.3% in the asleep group. No one with an IDH gene change: A small change in a tumor's IDH gene. Tumors with this change often grow more slowly and may respond to different treatments. Your pathology report says whether your tumor has it. See the glossary glioma: A tumor that starts in the glial cells, the support cells of the brain and spinal cord. Gliomas are graded 1 to 4 by how fast they tend to grow. See the glossary had a new problem. Among people with glioblastoma: The fastest-growing type of glioma (grade 4). Treatment usually starts soon after diagnosis: surgery first, then radiation and chemotherapy. See the glossary, how long people lived was similar with either method. Two different tools used during asleep mapping had rates of 3.3% and 16.7%.
What this means, and what it doesn't
What it could mean: If you cannot be awake for surgery, mapping while asleep may still protect your movement. That gives your surgical team another safe option. It is worth asking your surgeon which method they use and why.
What it doesn't mean: This does not mean one method is proven better or equal to the other. The authors looked back at records of past patients. That kind of study can miss important differences, and they say larger, planned studies are still needed. It also does not change anything about your tumor itself, and it is not a cure.
Source: PubMed, July 13, 2026 · Read the original
This plain-language summary was written by AI and published automatically after passing our automatic safety checks. How we write.