（一名心主，以脏象校之，在心下横膜之上，竖膜之下，与横膜相粘，而黄脂漫裹者，心也。
其漫脂之外，有细筋膜如丝，与心肺相连者，心包也。心为君火，心包为相火，代君火行事。以用而言，则曰
手心主；以经而言，则曰心包络，一经而二名也）《灵枢》曰∶手厥阴心包络之脉，起于胸中，出属心包（心
为五脏六腑之大主，诸邪之在心，皆在心之包络。包络者，心主之脉也。胸中，当两乳之间，而为心主之外卫）
络，下膈，历络三焦（三焦，为脏腑之外卫，诸经皆无历字，独此有之，盖指上、中、下而言，上即膻中，中
即中脘，下即脐下。故任脉之阴交穴，为三焦募也）；其支者，循胸出胁，下腋三寸（肋上际为腋，腋下三寸
天池也，手厥阴经始此），上抵腋下，循 内，行太阴、少阴之间（上抵腋下之天泉，循 内行太阴、少阴之
间，以手之三阴厥阴在中也），入肘中，下臂，行两筋之间（入肘中，曲泽穴也，下臂行两脉之间， 门、间
使、内关、大陵），入掌中指，循中指，出其端（入掌中，劳宫也。中指端，中冲也，手厥阴止于此），其支
者，别掌中，循小指次指出其端（小指之次，即无名指也。其支者，自劳宫别行无名指端，而接乎手少阳也）。
其别，名曰内关，去腕二寸，出于两筋之间，循经以上系于心包，络心系。实则心痛，虚则为头强，而取之两
筋间也（手厥阴之络，名内关，在掌后去腕二寸两筋间，别走手少阳者也。此经系心包，络心系，又出耳后，
合少阳完骨之下。病取内关治之）。其正，别入渊腋三寸，入胸中，别属三焦，出循喉咙，出耳后，合少阳完
骨之下，此为五合
（手厥阴之正，其别而内行者，与少阴之脉同，自腋下三寸。足少阳渊腋之次，入胸中，属三焦，乃出循喉咙，
行于耳后，合手、足少阳于完骨之下。此乃六合之五也）。其筋起于中指，与太阴之筋并行，结于肘内廉（中
指端，中冲之次也。循指入掌中，至掌后大陵之次，并手太阴之筋，上结于肘内廉曲泽之次），上臂阴，结腋下，
下散前后挟胁（上臂阴天泉之次，由曲腋间，并太阴之筋，结于腋下，当天池之次下行，前后布散挟胁，联于
手太阴、足少阳之筋。此经自掌至腋，皆刚筋也）；其支者，入腋，散胸中，结于臂（此支者，自天池之分，
入腋内，散于胸中。臂，当作贲。盖此支并太阴之筋，入散胸中，故同结于贲门也）。是动则病手心热，臂肘
挛急，腋肿，甚则胸胁支满，心中 大动，面赤目黄，喜笑不休。是主脉所生病者，烦心心痛，掌中热，盛
者寸口大一倍于人迎，虚者寸口反小于人迎也。
(The Pericardium Collateral, also known as the Master of the Heart. By examining the zang-organ manifestations, it is located above the horizontal diaphragm and below the vertical diaphragm, adhering to the horizontal diaphragm, and wrapped in yellow adipose tissue; this is the Heart. Outside this yellow adipose tissue, there are fine fibrous membranes like silk connecting to the Heart and Lungs; this is the Pericardium. The Heart belongs to Ministerial Fire (Jun Huo), while the Pericardium belongs to Ministerial Fire (Xiang Huo) and acts on behalf of the Ministerial Fire. In terms of function, it is called the Hand Jueyin Pericardium; in terms of meridian nomenclature, it is called the Pericardium Collateral (Xin Bao Luo). This is one meridian with two names.) The *Ling Shu* states: The Hand Jueyin Pericardium Collateral Meridian originates in the chest, emerges and connects to the Pericardium (The Heart is the great master of the five zang and six fu organs; when various pathogens invade the Heart, they invade the Pericardium Collateral instead. The Pericardium Collateral is the meridian of the Master of the Heart. The chest refers to the area between the two breasts, serving as the external guard for the Master of the Heart), descends through the diaphragm, and sequentially connects to the Sanjiao (The Sanjiao serves as the external guard for the zang-fu organs. Among all meridians, only this one uses the character "li" (to pass through/sequence), which likely refers to the upper, middle, and lower sections. The upper section corresponds to the Danzhong area, the middle to the Zhongwan area, and the lower to the area below the umbilicus. Therefore, the Yinjiao point of the Ren Mai is the mu-point of the Sanjiao); its branch follows the chest, emerges from the hypochondrium, and descends three cun below the axilla (the upper border of the ribs marks the axilla; Tianchi, three cun below the axilla, is where the Hand Jueyin meridian begins), ascends to reach the axilla, runs along the medial aspect of the arm, passing between the Taiyin and Shaoyin meridians (ascending to Tianquan in the axilla, running along the medial arm between the Hand Taiyin and Hand Shaoyin meridians, because among the three yin meridians of the hand, the Jueyin is in the middle), enters the elbow center, descends the forearm, running between two tendons (entering the elbow center is Quze; descending the forearm between two vessels passes through Ximen, Jiashi, Neiguan, and Daling), enters the palm and reaches the middle finger, follows the middle finger, and exits at its tip (entering the palm is Laogong. The tip of the middle finger is Zhongchong, where the Hand Jueyin meridian ends). Its other branch diverges from the palm, follows the ring finger, and exits at its tip (the finger next to the little finger is the ring finger. This branch diverges from Laogong, travels to the tip of the ring finger, and connects to the Hand Shaoyang Sanjiao Meridian). Its collateral is named Neiguan, two cun from the wrist crease, emerging between two tendons, following the meridian upward to connect to the Pericardium and link with the Heart system. Excess conditions manifest as heart pain, while deficiency conditions manifest as stiffness and rigidity of the head and neck; treatment involves selecting points between the two tendons (The collateral of the Hand Jueyin is named Neiguan, located two cun distal to the wrist crease between two tendons, diverging to connect with the Hand Shaoyang meridian. This meridian connects to the Pericardium, links with the Heart system, emerges behind the ear, and converges below the Wanggu point of the Shaoyang meridian. For diseases, treat with Neiguan). Its main pathway additionally enters three cun below Yuanye, enters the chest, diverges to connect to the Sanjiao, emerges following the throat, exits behind the ear, and converges below the Wanggu point of the Shaoyang meridian; this constitutes the fifth of the Six Convergences (The main pathway of the Hand Jueyin, specifically its internal branch, follows a path similar to the Shaoyin meridian, starting from three cun below the axilla, beside the Yuanye point of the Foot Shaoyang meridian, entering the chest, connecting to the Sanjiao, then emerging to follow the throat, traveling behind the ear, and converging with the Hand and Foot Shaoyang meridians below Wanggu. This is the fifth of the Six Convergences). Its sinews originate at the middle finger, run parallel with the sinews of the Taiyin, and knot at the medial aspect of the elbow (beside the tip of the middle finger, Zhongchong; following the finger into the palm, to beside Daling at the wrist, running parallel with the Hand Taiyin sinews, ascending to knot at the medial aspect of the elbow beside Quze), ascend along the medial aspect of the upper arm, knot at the axilla, and descend to scatter anteriorly and posteriorly flanking the hypochondrium (beside Tianquan on the medial aspect of the upper arm, from the curved axillary region, running parallel with the Taiyin sinews, knotting at the axilla beside Tianchi, descending, scattering anteriorly and posteriorly to flank the hypochondrium, linking with the Hand Taiyin and Foot Shaoyang sinews. From the palm to the axilla, this meridian consists of rigid sinews); its branch enters the axilla, scatters in the chest, and knots at the贲 (ben) gate (this branch diverges from Tianchi, enters the interior of the axilla, and scatters in the chest. The character "bi" (arm) here should be read as "ben". Since this branch runs parallel with the Hand Taiyin sinews, entering and scattering in the chest, it thus knots together at the ben gate). When the meridian is disturbed, symptoms include heat in the palm, spasm and stiffness of the arm and elbow, swelling of the axilla, and in severe cases, fullness and distension supporting the chest and hypochondrium, palpitations of the heart, redness of the face, yellowing of the eyes, and uncontrollable laughter. This meridian governs diseases related to the vessels, including vexation, heart pain, and heat in the palms. In excess conditions, the Cun Kou pulse is one times larger than the Ren Ying pulse; in deficiency conditions, the Cun Kou pulse is smaller than the Ren Ying pulse.