张介宾曰∶心包一脏，《难经》言其无形。滑寿曰∶心包一名手心主。以脏象校之，在
心下横膜之上，竖膜之下，其与横膜相粘，而黄脂裹者心也；脂KT
之外，有细筋膜如丝，与
心肺相连者，心包也。此说为是，凡言无形者非。《灵兰秘典论》有∶十二官，独少心包
一官。而有“膻中者，臣使之官，喜乐出
焉”二句。今考心包，脏居膈上，经始胸中，正值膻中之所，位居相火，代君行事，实臣
使也。此一官即此经之谓欤。
\r手厥阴心包络图\p06-d43a68.bmp\r
手厥阴心主包络之脉，起于胸中，出属
心包络，下膈历络三焦。其支者，循胸中出胁下腋三寸，上抵腋下，循 内，行太阴少
阴之间，入肘中，下臂行两筋之间，入掌中，循中指出其端；其支者，别掌中循小指次指
出其端。
\r心包络经循行图\p06-d43a69.bmp\r
手厥阴心主起胸，属包下膈三焦宫，支者循胸出胁下，胁下连腋三寸同，仍上抵腋
循内，太阴少阴两经中，指透中冲支者别，小指次指络相通。
【注】手厥阴心包络之脉，起于胸中，出而外行天池穴，属心包络之经也。内行下膈，
历络三焦者，散布于腹之上、中、下也。其支者，循胸中出腋下三寸，即天池穴处也。从
天池循 内至天泉，从天泉穴行手太阴、手少阴两脉之间，入肘内曲泽穴，下臂行两筋
之间， 门、间使、内关、大陵四穴，入掌中劳宫穴，从劳宫循中指出其端，中冲穴也。
其本支之别支，别行掌中，循小指次指之端，以交于手少阳三焦经也。
张介宾说：心包这一脏器，《难经》称其无形。滑寿说：心包又名手心主。根据脏象理论来考察，它位于心脏下方的横膈膜之上、竖膈膜之下，与横膈膜粘连并被黄色脂肪包裹的是心脏；在黄色脂肪之外，有像丝一样的细筋膜，与心肺相连的，就是心包。这种说法是正确的，凡是说心包无形的观点是不对的。《灵兰秘典论》中提到：十二官中唯独缺少心包这一官职。但又有“膻中者，臣使之官，喜乐出焉”这两句话。现在考证心包，脏器居于膈上，经脉起始于胸中，正值膻中的位置，位居相火（辅助君火的火），代替君主行事，确实是臣使。这一个官职指的就是这条经脉吧。
手厥阴心主包络的经脉，起始于胸中，向外属于心包络，向下穿过膈肌，依次联络三焦。它的分支，沿着胸中走出胁下腋窝前三寸处，向上到达腋下，沿上臂内侧下行，行于手太阴肺经和手少阴心经之间，进入肘中，向下沿前臂行于两筋之间，进入手掌中，沿中指直达其末端；另一分支，从掌中分出，沿无名指直达其末端。
手厥阴心主起于胸，属包络下膈连三焦宫，分支循胸出胁下，胁下连腋三寸同，仍上抵腋下循内，行于太阴少阴两经中，指尖透中冲穴分支别，小指次指络相通。
【注】手厥阴心包络的经脉，起始于胸中，外出而外行经过天池穴，属于心包络的经脉。向内下行穿过膈肌，依次联络三焦，是散布于腹部的上、中、下三部。它的分支，沿着胸中走出腋下三寸处，即天池穴的位置。从天池穴沿上臂内侧行至天泉穴，从天泉穴行于手太阴、手少阴两条经脉之间，进入肘内曲泽穴，向下沿前臂行于两筋之间，经过郄门、间使、内关、大陵四穴，进入手掌中劳宫穴，从劳宫穴沿中指直达其末端，即中冲穴。其本支的另一分支，另从掌中分出，沿无名指直达其末端，以交接手少阳三焦经。
Zhang Jiebin stated: Regarding the Pericardium (Xin Bao) organ, the *Nan Jing* (Classic of Difficult Issues) states it is formless. Hua Shou stated: The Pericardium is also known as the Hand-Shaoyin Master-Centre (Shou Xin Zhu). Examining it according to Zang-Fu manifestation theory, it is located above the transverse diaphragm and below the vertical diaphragm; what is adhered to the transverse diaphragm and wrapped in yellow fat is the Heart; outside this fat, there are fine fibrous membranes like silk connecting to the Heart and Lungs, which is the Pericardium. This explanation is correct, and those who claim it is formless are wrong. The *Ling Shu · Ling Lan Mi Dian Lun* mentions that among the Twelve Officials, only the Pericardium official is missing. However, it also contains the sentences: "The Dan Zhong (Chest/Pericardium) is the Official of the Envoy, from whom joy and pleasure emerge." Upon examination, the Pericardium organ resides above the diaphragm, and its meridian begins in the chest, precisely at the location of the Dan Zhong. It occupies the position of Ministerial Fire (Xiang Huo), acting on behalf of the Sovereign (Heart), truly serving as an Envoy. Does this official refer to this meridian?
The meridian of the Hand-Jueyin Pericardium Master-Centre originates in the chest, emerges to connect with the Pericardium, descends through the diaphragm, and successively links with the Triple Burner (San Jiao). Its branch follows the chest, emerges from the hypochondrium three cun lateral to the axilla, ascends to reach the axilla, travels along the medial aspect of the upper arm, running between the Taiyin and Shaoyin meridians, enters the elbow, descends along the forearm between two tendons, enters the palm, and follows the middle finger to its tip; another branch diverges from the palm, follows the ring finger to its tip.
The Hand-Jueyin Pericardium Master-Centre originates in the chest, connects to the Pericardium, descends through the diaphragm to the Triple Burner Palace; branches follow the chest, emerge from the hypochondrium, connecting to the axilla three cun apart; ascending to the axilla and traveling medially, it runs between the Taiyin and Shaoyin meridians; the finger penetrates Zhongchong (PC5), branches diverge, connecting via the ring finger.
[Note] The meridian of the Hand-Jueyin Pericardium originates in the chest, emerges externally passing through Tianchi (PC1), belonging to the Pericardium meridian. Internally descending through the diaphragm and successively linking the Triple Burner refers to its distribution across the upper, middle, and lower abdomen. Its branch follows the chest, emerging three cun lateral to the axilla, which is the location of Tianchi (PC1). From Tianchi, it travels along the medial aspect of the arm to Tianquan (PC2); from Tianquan, it runs between the Hand-Taiyin and Hand-Shaoyin meridians, entering Quze (PC3) in the elbow. Descending along the forearm between two tendons, it passes through Ximen (PC4), Jianshi (PC5), Neiguan (PC6), and Daling (PC7), enters the palm at Laogong (PC8), follows the middle finger to its tip, which is Zhongchong (PC9). Another branch of the main stem diverges from the palm, follows the ring finger to its tip, and connects with the Hand-Shaoyang Triple Burner meridian.