A brain pathway linked to speech after tumor surgery
Original title: Role of the frontal aslant tract in language preservation and recovery after surgery: a multicenter analysis of patients with left frontal glioma.
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.
Doctors watched what happened to patients having surgery. It is not a new treatment you can ask for.
The short version
When surgeons cut into one nerve pathway during brain tumor surgery, patients were more likely to have lasting trouble speaking.
What was studied. Doctors at three hospitals in northern Italy followed 51 adults who had surgery for a brain tumor called 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. The tumors were on the side of the brain that handles language. Scans taken before and after surgery showed how much of a nerve pathway called the frontal aslant tract was cut, and patients were checked again 3 months later.
What they found. Language got worse right after surgery in 29 patients (56.9%). At the 3 month check, 14 patients still had speech problems. Trouble with speech was more likely when a larger amount of the pathway was cut, and when the middle part of it was cut. Cutting at least 0.5 cm3 of the pathway pointed to speech problems that lasted.
What this means, and what it doesn't
What it could mean: If you need surgery for a tumor in this part of the brain, your surgeon may map this pathway on your scans first. The study suggests the middle part of the pathway deserves extra care. That planning may help protect your speech while still removing tumor.
What it doesn't mean: This is not a new treatment, and it is not a cure. It is one study that watched what happened to 51 patients during and after surgery. It does not prove that mapping this pathway leads to better speech. Speech loss after this kind of surgery may not come back for everyone. Your own surgery plan still depends on your tumor and your care team.
Source: PubMed, July 3, 2026 · Read the original
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