Drug-resistant epilepsy affects millions of people worldwide and remains one of the most difficult neurological diseases to treat. For patients who continue to have seizures despite medication, surgical removal of the tissue that caused the seizures may be effective.
However, surgery is not always possible, especially when the epileptogenic area overlaps with areas responsible for important functions such as language or movement. Stereo-EEG-guided radiofrequency thermocoagulation (RF-TC) uses implanted electrodes to irradiate targeted thermal lesions, providing a potential treatment option that reduces surgical burden and recovery time.
A research team led by Professor Haifeng Shu and Dr. Xin Chen from the Department of Neurosurgery, Western Theater District General Hospital, Southwest Jiaotong University, China, investigated how RF-TC changes communication pathways in the brain and whether these changes are associated with improvement in seizures.
By analyzing functional connectivity before and after treatment, the research team sought to understand whether RF-TCs serve more than a local tissue destruction procedure. The paper is available online and was published in volume 12, article number 9 of the journal. Chinese Neurosurgical Journal March 12, 2026.
Researchers retrospectively studied 17 patients with medically refractory epilepsy who underwent stereo-EEG monitoring followed by RF-TC. They examined awake resting state records collected before and immediately after treatment.
They used advanced signal analysis to measure how strongly different brain regions were synchronized across the delta, theta, alpha, beta, and gamma frequency bands. They also applied graph theory techniques to assess in detail whether key communication hubs within the seizure network were weakened or reorganized after treatment.
The most pronounced effects were seen in the alpha frequency band, which is often associated with stable, long-range brain communication. After RF-TC, connectivity both within epileptogenic zones and between those zones and other sampling regions was significantly reduced.
Some network properties also changed, such as decreased betweenness centrality, suggesting that the dominance of seizure-driving pathways decreased after treatment. These findings support the idea that RF-TC may disrupt anomalous network synchronization rather than simply disrupting small target areas locally.
Clinical outcomes were also important. Patients who did not achieve significant seizure relief showed stronger reductions in alpha and theta band connectivity, suggesting more widespread but less beneficial network disruption. In contrast, patients who improved showed increased gamma-band clustering, which may reflect healthier local circuit reorganization after pathological pathways weaken after treatment.
RF-TC appears to affect the epileptic brain as a network therapy rather than just a local lesion. Early electrophysiological signals after treatment may help clinicians understand whether the intervention is likely to be successful. ”
Mr. Xu Haifeng, Professor of Neurosurgery, Department of Medicine, Western Theater District General Hospital, Southwest Jiaotong University
This discovery could have immediate practical value. Predicting response with short post-procedure records could allow physicians to assess efficacy early and adjust treatment strategies accordingly. This may include considering additional interventions or alternative treatments in a more timely manner.
This research also has far-reaching implications for neuroscience and precision medicine. Understanding how targeted hyperthermia restructures dysfunctional circuits could lead to future collaborations among neurosurgeons, engineers, imaging experts, and computational scientists working on personalized treatments for epilepsy and other brain diseases around the world.
Dr. Chen added, “Our long-term goal is to combine brain network analysis with individualized intervention planning to ensure each patient receives the most effective and least invasive treatment possible.”
Although the authors note that large-scale prospective studies are still needed, the results suggest that RF-TC could be an important step toward network-guided epilepsy treatment worldwide.
sauce:
Chinese Neurosurgical Journal
Reference magazines:
Shen, D. others (2026) Changes in functional connectivity and network properties after stereoelectroencephalography-guided radiofrequency thermocoagulation. Chinese Neurosurgical Journal. DOI:10.1186/s41016-026-00428-8. https://link.springer.com/article/10.1186/s41016-026-00428-8.
