Utilizing neuronal network electrical signals to identify extended consciousness disorders
BEIJING, FENGTAI, CHINA, August 14, 2026 /EINPresswire.com/ — For patients with severe brain injuries, correctly detecting prolonged disorders of consciousness (pDOC) remains difficult, and misdiagnosis reduces treatment success. Current data reveal a 40% error rate even when advanced diagnostic tools are employed. This largely stems from patient conditions—fatigue, sedation, or unresponsive states. At present, clinicians rely on multiple brain imaging methods as the definitive approach to assess whether a patient is conscious.
The team from Hebei Medical University examined several scientific research databases to summarize existing evidence on pDOC management strategies. They concentrated specifically on studies that recorded the brain’s electrical signals, known as “local field potential,” directly in pDOC patients. The research, led by Dr. Conghui Li and Dr. Yi Yang, appeared in the Chinese Neurosurgical Journal on July 13, 2026, as Volume 12, article 22. Dr. Conghui Li stated, “We aim to analyze how the brain electrical signal recordings support the pDOC diagnosis and study the possible outcomes and limitations of this technique.”
This review introduces a brain communication network model to explain how injury leads to prolonged unconsciousness. According to the model, brain damage kills or harms numerous nerve cells, interrupting the transmission of electrical signals to deep structures such as the thalamus. Consequently, communication between essential brain regions weakens, reducing overall brain function. Supporting this idea, four key measures of electrical signaling activity were identified that help researchers gauge a patient’s level of consciousness.
A healthy conscious brain maintains a constant, organized, and balanced mixture of activating slow signals and calming fast signals, both rhythmic and non‑rhythmic. Notably, distinct regions of the active brain continuously interact in a controlled, non‑chaotic manner. Another scientific theory holds that an active brain performs multiple tasks simultaneously—each area processes its own information while keeping its communication network operational.
Severe brain injury disrupts all these balanced signaling pathways and communication networks: rapid, active brain waves weaken, while slower signals become more dominant. Moreover, the coordinated activity of multiple brain regions suffers, and instead of a continuous flow, the brain emits short, simple, and less organized signals. The brain’s capacity to process information also declines during unconsciousness. Altogether, these changes reduce a person’s awareness and responsiveness.
Current comparisons between healthy brains and severely injured brains reveal poorer communication between the thalamus and the brain’s outer layer in pDOC patients. Measuring the complexity of this signaling—especially after brain stimulation—helps clinicians estimate a person’s level of consciousness.
Research involving animal studies, anesthesia‑based investigations, and brain injury patient studies has uncovered five additional important brain signaling activities that could enhance understanding, diagnosis, and treatment of pDOC. In severe brain injury, coordination between different brain areas is lacking, and electrical signals appear as interrupted short bursts. A failure of individual brain cells to fire in synchrony with rhythmic signals, along with an imbalance in overall signaling activity, is also seen in pDOC patients. Mild stimulation to the brain, particularly the thalamus, can restore normal activity; therefore, measuring the brain’s response to stimulation offers a reliable method for detecting hidden awareness.
Dr. Li commented, “There are also important ethical challenges identified regarding the studies, such as obtaining consent from family members, equality in obtaining treatment, and clearly explaining uncertain test results to the family.”
Nevertheless, more detailed research is needed in the future. The reviewed studies included only a small number of patients with various types of brain injuries, and recordings were made under differing conditions. Hence, the findings cannot be applied with confidence to individual patients.
In conclusion, directly measuring brain electrical signals from inner brain areas enables more accurate diagnoses and more personalized treatments. According to Dr. Li, “Further studies on large patient populations, collaboration between hospitals, and strong ethical guidelines are necessary to make this diagnostic test more reliable.”
Reference
Title of original paper: Advances in local field potential research in prolonged disorders of consciousness: a narrative review
Journal: Chinese Neurosurgical Journal
DOI: https://doi.org/10.1186/s41016-026-00441-x
About the University
Hebei Medical University (abbreviated as HMU), formerly known as the Beiyang Medical School, is one of the high‑ranking universities in Hebei Province. Founded by Governor Li Hongzhang in Tianjin in 1894, Hebei Medical University was the very first Western medical school established by the government. HMU has four post‑doctoral programs—Basic Medical Sciences, Clinical Medicine, Integration of TCM and Western Medicine, and Biology—37 doctoral programs, and 52 master’s programs. HMU has five directly affiliated hospitals and 5 indirectly affiliated hospitals, five teaching hospitals, and 28 sites for clinical practice. HMU is not only the center for medical education and healthcare services but also the center for medical research in Hebei Province.
Website: https://en.hebmu.edu.cn/
About Dr. Conghui Li from The First Hospital of Hebei Medical University
Dr. Conghui Li is a neurosurgery researcher and clinician affiliated with the Department of Neurosurgery at The First Hospital of Hebei Medical University, China. His research focuses on disorders of consciousness (pDOC), deep brain stimulation (DBS), thalamic electrophysiology, moyamoya disease, and cerebral revascularization surgery. He has contributed to multiple peer‑reviewed publications in neurosurgery and neuroscience, including studies on intracranial electrophysiology, prolonged disorders of consciousness, and advanced neurosurgical treatments. His work aims to improve the understanding of brain function after severe injury and to develop better diagnostic and therapeutic approaches for neurological disorders.
About Dr. Yi Yang from Beijing Tiantan Hospital, Capital Medical University
Professor Yi Yang, MD, is a neurosurgeon, researcher, and associate professor at Beijing Tiantan Hospital, Capital Medical University, where she also serves as a doctoral supervisor. Her research focuses on disorders of consciousness, deep brain stimulation, neuromodulation, brain–computer interfaces, and clinical neurophysiology. She has authored more than 60 peer‑reviewed publications and has led over 15 national and provincial research projects. As an Oxford University Visiting Scholar, Dr. Yang has received recognition as a Beijing Science and Technology Rising Star and Beijing Brain Science Young Scholar. Her work combines advanced neuroscience with innovative clinical technologies to improve the diagnosis, treatment, and rehabilitation of patients with severe neurological disorders.
Funding information
This study was funded by International (Hong Kong, Macao, and Taiwan) Science and Technology Cooperation Project (Z221100002722014), Science and Technology Innovation 2030 (2022ZD0205300), Chinese Institute for Brain Research Youth Scholar Program (2022-NKX-XM-02), National Natural Science Foundation of China (82371197), and Natural Science Foundation of Beijing Municipality (7232049).
Yi Lu
Chinese Neurosurgical Journal
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