Discussion on The Central Mechanism of Baihui in The Treatment of Insomnia Based on Functional Imaging
Baihui is a potent point for the treatment of insomnia and is used frequently in clinical practice.Functional imaging,broadly defined,includes a variety of imaging techniques,narrowly defined,mainly refers to functional magnetic resonance imaging(fMRI),data analysis methods are divided into two categories,functional separation and functional integration,and the experimental design scheme includes the task state(Tb-fMRI)and the resting state(Rs-fMRI),and the resting state has been widely used due to its ease of operation and ability to intuitively reflect the sustained and cumulative effects of acupuncture.Several fMRI studies have shown that insomnia patients have localized functional abnormalities in visual areas,sensory-motor areas,and emotion-related brain areas,etc.Acupuncture of a single point or a group of points at Baihui can cause changes in specific brain areas,such as parietal lobe,frontal lobe,temporal lobe,etc.,and thus improve sleep.Acupuncture of single acupoint Baihui mainly focuses on Rs-fMRI lo-cal consistency(ReHo)and ratiometric low-frequency amplitude(fALFF),while acupuncture of group acupoints of Baihui has been studied in terms of Rs-fMRI local consistency(ReHo),degree centrality(DC),seed connectivity(FC),as well as Tb-fMRI ratiomet-ric low-frequency amplitude(fALFF),and the study found that the local functional abnormalities in the brain areas under different research methods and combinations of acupoints can cause changes in specific brain areas such as parietal lobe and temporal lobe to improve sleep.It was found that there were differences in the activation changes of brain regions under different research methods and acupoint combinations,and that acupuncture of Baihui group acupoints regulated more brain regions than single acupoints,re-flecting the regulatory effects of Baihui on insomnia,cognition and emotion,as well as the synergistic effects among acupoints.However,the central signal changes induced by acupuncture at Baihui are complex,and although functional imaging has potential as a central indicator for assessing insomnia,more standardized and in-depth studies are needed.
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