承浆穴是任脉与足阳明胃经交会穴，历代临床常应用其治疗郁证等神志类疾病，然而该穴起效的作用机制仍缺乏系统性阐释。本文从神经解剖学角度，梳理承浆穴局部解剖结构、多级神经传导通路，解析其经脉交会特性对应的现代生物学依据，并进一步探讨该穴干预癔病性失语、癫痫及面肌痉挛等病症的潜在作用机制。研究显示，承浆穴受三叉神经感觉支、面神经运动支双重神经支配，形成“双源性”神经支配特征，为针刺信号传入提供了解剖学结构基础；该穴疗效经由“三叉神经-脑桥核团-网状结构-边缘系统”三级传导通路介导，依次完成信号接收、意识水平双向调控与情绪记忆调节；刺激承浆穴还可经“三叉神经-迷走神经复合体”调控自主神经功能，为传统“任督交会”理论提供现代生物学阐释。基于上述神经传导通路，本文创新性提出：承浆穴治疗癔病性失语可能存在疑核协同及皮层唤醒机制；干预癫痫可产生去同步化调控效应；针对情志相关性面肌痉挛，通过边缘系统-脑干反射通路实现双向调节。本文从神经科学角度为承浆穴的现代临床运用提供了理论依据。

Chengjiang(CV24) is the crossing point of the Conception Vessel and the Stomach Meridian of Foot-Yangming. It has been widely used clinically for the treatment of mental disorders such as depression in successive dynasties, yet its therapeutic mechanism lacks systematic elucidation. From the perspective of neuroanatomy, this paper reviews the local anatomical structures and multi-level neural conduction pathways of Chengjiang (CV24), analyzes the modern biological basis corresponding to its meridian crossing characteristics, and further explores the potential mechanisms of this acupoint in treating hysterical aphasia, epilepsy and facial spasm. The results show that Chengjiang (CV24) is innervated by both sensory branches of the trigeminal nerve and motor branches of the facial nerve, presenting a characteristic of dual-source innervation, which lays an anatomical foundation for the transmission of acupuncture signals. Its therapeutic effects are mediated by the three-level conduction pathway of "trigeminal nerve-pontine nuclei-reticular formation-limbic system", which sequentially realizes signal reception, bidirectional regulation of consciousness and modulation of emotion and memory. Stimulation at Chengjiang (CV24) can also regulate autonomic nervous function via the trigeminal-vagal complex, providing modern biological interpretation for the traditional theory of convergence of the Conception and Governor Vessels. Based on the above neural pathways, this study innovatively proposes that the treatment of hysterical aphasia with Chengjiang (CV24) involves the coordination of nucleus ambiguus and cortical arousal mechanism; it exerts desynchronization regulation on epilepsy, and achieves bidirectional modulation on emotion-related facial spasm through the limbic system-brainstem reflex. This study provides theoretical evidence for the modern clinical application of Chengjiang (CV24) from a neuroscientific perspective.