TU Zhiyi,ZHANG Yuehan,L Xueyang,et al.Neural functional network of the lateral habenula and prefrontal cortex in SD rats under general anesthesia with sevoflurane[J].Journal of Tongji University(Medical Science),2025,46(1):15-20. [点击复制]
Neural functional network of the lateral habenula and prefrontal cortex in SD rats under general anesthesia with sevoflurane
TU Zhiyi,ZHANG Yuehan,L Xueyang,YU Xinren,WANG Yanyan,ZHAO Xuan
(School of Medicine, Tongji University, Shanghai 200092, China;Department of Anesthesiology, Shanghai Tenth People’s Hospital, School of Medicine, Tongji University, Shanghai 200072, China)
Abstract:
Objective To investigate the dynamic changes in the brain functional network between the lateral habenula and the prefrontal cortex under anesthesia with sevoflurane in rats, and to elucidate the potential neural mechanisms by which sevoflurane exerts its systemic anesthetic effects. Methods Eight to twelve-week-old SD rats were selected. Multi-channel electrodes were implanted separately in the prefrontal cortex and lateral habenula brain regions. Anesthesia was induced and maintained with 2% sevoflurane, and real-time electrical signals were collected from the lateral habenula and prefrontal cortex. The power, coherence, and Granger causality of the prefrontal cortex and lateral habenula electroencephalogram(EEG) were calculated and compared during wakefulness, anesthesia, and recovery periods to explore the effects of sevoflurane on the electrophysiological activity of the lateral habenula and prefrontal cortex. Results Compared to the awake state, sevoflurane anesthesia induced a significant increase in delta-band power in the prefrontal cortex and lateral habenula(prefrontal cortex: P=0.030 9; lateral habenula: P<0.001), as well as a decrease in high-frequency gamma oscillations(prefrontal cortex: P=0.682 4; lateral habenula: P<0.000 1). Sevoflurane anesthesia leaded to a significant increase in coherence in the delta frequency band(P<0.001) and abnormal enhancement of information flow from the prefrontal cortex to the lateral habenula(P<0.01). Conclusion The increase in delta band power and coherence between the lateral habenula and prefrontal cortex, along with the enhanced abnormal information flow from the prefrontal cortex to the lateral habenula, may be potential mechanisms underlying the loss of consciousness induced by sevoflurane anesthesia.