会阴正在两阴间。曲骨脐下毛际安。中极脐下四寸取。石门二寸关元三。气海脐
寸半。阴交脐下一寸放。分明脐中号神阙。水分脐上一寸列。下脘建里中上脘。各各一寸为
君说。巨阙上脘一寸半。鸠尾蔽骨五分断。中庭膻中寸六分。膻中两乳中间存。玉堂紫宫及
华盖。相去各一寸六分。华盖玑下一寸量。璇玑突下一寸当。天突结下宛宛内。廉泉颐下骨
尖旁。承浆唇前颐棱下。任脉俞穴终此章。
或曰。诸穴相去尺寸。针灸家多屈男左女右中指中节两横纹尖为一寸。折量周身之穴。
果合经欤否欤。
曰。天有三百六十五度。人身孔穴上应天度。亦有三百六十五穴。穴俞相去远近而以中
指中
之周身孔穴。各有定寸。如头之大骨。围二尺六寸。发所覆者。颅至项一尺二寸。前发际至
百会五寸。后发际至百会七寸。头形北高南下。显然不同。折量令人散发分归左右。用篾自
前发际量至后发际。不拘头之大小。折作一尺二寸。则穴穴各有攸当。发际不明。取眉心直
上。量至大椎穴上。折作一尺八寸也。今取百会穴者。云在顶上旋毛中。而旋有正有偏。又
取前后发际及两耳尖上折中。殊不思五寸七寸多寡不同。岂能以此为准则哉。发以下至颐。
长一尺。耳后当完骨。广九寸。耳前当耳门。广一尺三寸。两颧之间。相去七寸。两髀之间
。广六寸半。足长一尺二寸。广四寸半。胸围四尺五寸。腰围四尺二寸。结喉下至缺盆中。
长四寸。缺盆下至 KT 。长九寸。 KT 下至天枢。长八寸。天枢下至横骨。长六寸半。横
骨上廉下至内辅上廉。长一尺八寸。内辅上廉下至下廉。长三寸半。内辅下廉下至内踝。长一
尺三寸。内踝下至地。长三寸。膝 下至跗属。长一尺六寸。跗属下至地。长三寸。角以下
至柱骨。长一尺。行腋中不见者。长四寸。腋下至季胁。长一尺二寸。季胁下至髀枢。长六
寸。髀枢下至膝中。长一尺九寸。膝下至外踝。长一尺六寸。外踝下至京骨。长三寸。京骨
下至地。长一寸。背部大椎至尾 。共二十一节。折作三尺。每节得一寸四分。奇分俱剩在
下七节也。横寸约取。背中脊骨作一寸横开。腹部两乳之间。折为八寸。横寸准此。心蔽
骨下至脐中七寸。无蔽骨。取心岐骨下至脐中作七寸。直寸准此。脐下用直寸量之。手部中
指末至本节四寸半。本节至腕四寸。腕至肘一尺二寸半。肘至肩一尺七寸。可见俗以中指中
节为一寸者。误矣。此所谓同身寸也。无问汤之七尺。文王九尺。曾交九尺四寸。肥瘦侏儒
。俱准灵枢所定尺寸。折量孔穴。不惟同身二字明白无疑。而古今固可以同之也。奈何时人
厌繁喜简。不读灵枢。徒使患者无辜而受炮烙之苦。忍哉。
会阴穴位于两阴部之间。曲骨穴在脐下、阴毛边缘处。中极穴取在脐下四寸。石门穴在脐下二寸，关元穴在脐下三寸。气海穴在脐下一寸半。阴交穴在脐下一寸处。神阙穴明确位于脐中央。水分穴列于脐上一寸处。下脘、建里、中脘、上脘这四个穴位，各自相距一寸，这是关于前部的解说。巨阙穴在上脘穴上一寸半处。鸠尾穴在剑突（蔽骨）下方五分处。中庭穴与膻中穴相距一寸六分。膻中穴存于两乳中间。玉堂、紫宫及华盖穴，彼此相距各为一寸六分。华盖穴在璇玑穴下一寸处测量。璇玑穴在胸骨突起下一寸处对应。天突穴在结喉下方的凹陷内。廉泉穴在颏下骨尖旁侧。承浆穴在唇前、颏棱下方。任脉的俞穴讲解至此章结束。
有人问：各个穴位之间的距离尺寸，针灸家多采用屈曲男子左手或女子右手中指的中节两横纹尖端作为一寸的标准，来折量全身穴位。这果真符合经典吗？
回答说：天有三百六十五度，人身孔穴上应天道度数，也有三百六十五个穴位。穴位之间的远近应当以中指中节的长度来衡量周身孔穴。每个穴位都有固定的尺寸标准。例如头部的最大骨骼，周长为二尺六寸；头发覆盖的部分，从颅顶到项部为一尺二寸；从前发际到百会穴为五寸，后发际到百会穴为七寸。头部形状北高南下，显然不同。折量时让人披散头发，将头发分别归向左右两侧，用竹篾从前发际量至后发际，不拘泥于头的大小，将其折算为一尺二寸，那么每个穴位就各有其恰当的位置。如果发际不明确，可取眉心直上，量至大椎穴上方，折算为一尺八寸。现在取百会穴的说法，称其在头顶旋毛中，但旋毛有正有偏；又取前后发际及两耳尖上折中的位置，殊不知五寸和七寸多少不同，怎么能以此为准则呢？发际以下至颐部，长一尺；耳后当完骨处，宽九寸；耳前当耳门处，宽一尺三寸；两颧之间，相距七寸；两髀（大腿内侧）之间，宽六寸半；足长一尺二寸，宽四寸半；胸围四尺五寸；腰围四尺二寸；结喉下至缺盆中，长四寸；缺盆下至胸部特定部位（原文“KT”疑为脱字，据《灵枢》应为“心下”或类似部位，此处依文意保留），长九寸；该部位下至天枢，长八寸；天枢下至横骨，长六寸半；横骨上廉下至内辅骨上廉，长一尺八寸；内辅骨上廉下至下廉，长三寸半；内辅骨下廉下至内踝，长一尺三寸；内踝下至地面，长三寸；膝下至跗属（足背连接处），长一尺六寸；跗属下至地面，长三寸；腋下至柱骨，长一尺；行于腋中不见的部分，长四寸；腋下至季胁，长一尺二寸；季胁下至髀枢（股骨大转子），长六寸；髀枢下至膝中，长一尺九寸；膝下至外踝，长一尺六寸；外踝下至京骨，长三寸；京骨下至地面，长一寸。背部大椎至尾骶，共二十一节，折算为三尺，每节得一寸四分，奇余部分均留在下面七节中。横寸约取方法：背中脊骨作一寸，横向开度；腹部两乳之间，折算为八寸，横寸以此为准。心剑突下至脐中为七寸，若无剑突，取心岐骨下至脐中作七寸，直寸以此为准。脐下用直寸量之。手部从中指末端至本节为四寸半，本节至腕为四寸，腕至肘为一尺二寸半，肘至肩为一尺七寸。由此可见，世俗以中指中节为一寸的说法是错误的。这所谓的同身寸，无论汤（人名）七尺、文王九尺、曾交九尺四寸，无论是肥是瘦还是侏儒，都依据《灵枢》所定的尺寸，折量孔穴。不仅“同身”二字明白无疑，而且古今可以通用。奈何时人厌恶繁琐喜欢简易，不读《灵枢》，徒然使患者无辜地遭受炮烙般的痛苦，真是残忍啊。
Huiyin is located between the two yin organs. Qugu is situated below the umbilicus at the pubic hairline. Zhongji is taken four cun below the umbilicus. Shimen is two cun below the umbilicus, and Guanyuan is three cun below the umbilicus. Qihai is one and a half cun below the umbilicus. Yinjiao is placed one cun below the umbilicus. Shenque is clearly identified at the center of the umbilicus. Shuifen is listed one cun above the umbilicus. Xiawan, Jianli, Zhongwan, and Shangwan are each one cun apart; this explains the anterior section. Jueque is one and a half cun above Shangwan. Jiutwei is broken off five fen below the xiphoid process (bi gu). Zhongting and Tanzhong are one and six fen apart. Tanzhong is preserved in the middle between the two breasts. Yutang, Zigong, and Huagai are each one and six fen apart from one another. Huagai is measured one cun below Xuanji. Xuanji corresponds to one cun below the sternal prominence. Tiantu is within the depression below the laryngeal prominence. Lianquan is beside the bony tip below the chin. Chengjiang is below the mental protuberance ridge in front of the lip. The acupoints of the Ren Mai conclude this chapter.
Someone asked: Regarding the distances between various acupoints, acupuncture practitioners often use the distance between the two transverse creases at the middle joint of the middle finger of men's left hand or women's right hand, bent, as one cun, to measure the acupoints of the whole body. Does this truly conform to the classics?
The answer is: Heaven has 365 degrees. The human body's acupoints correspond to the heavenly degrees, also numbering 365. The proximity and distance of acupoints should be measured by the middle joint of the middle finger for the entire body's acupoints. Each acupoint has a fixed measurement. For example, the largest bone of the head has a circumference of two chi six cun. The area covered by hair, from the cranium to the nape, is one chi two cun. From the anterior hairline to Baihui is five cun, and from the posterior hairline to Baihui is seven cun. The shape of the head is higher in the north and lower in the south, which is obviously different. When measuring, let the person spread their hair and divide it to the left and right. Use a bamboo strip to measure from the anterior hairline to the posterior hairline, regardless of the size of the head, and fold it to make one chi two cun. Then each acupoint will have its proper place. If the hairline is unclear, take the midpoint between the eyebrows straight up, measure to above Dazhui, and fold it to make one chi eight cun. Now, regarding the location of Baihui, it is said to be in the whorl of hair on the vertex, but the whorl can be central or eccentric. Also taking the midpoint between the anterior and posterior hairlines and the tops of the two ears, one fails to consider that five cun and seven cun differ in amount. How can this serve as a standard? From below the hairline to the chin is one chi long. Behind the ear at Wanggu, the width is nine cun. In front of the ear at Ermen, the width is one chi three cun. Between the two zygomatic arches, the distance is seven cun. Between the two thighs, the width is six and a half cun. The foot is one chi two cun long and four and a half cun wide. The chest circumference is four chi five cun. The waist circumference is four chi two cun. From the thyroid cartilage (jie hou) down to the center of Quepen is four cun. From Quepen down to [the chest] is nine cun. From there down to Tianshu is eight cun. From Tianshu down to Henggu is six and a half cun. From the upper border of Henggu down to the upper border of the medial epicondyle is one chi eight cun. From the upper border of the medial epicondyle down to the lower border is three and a half cun. From the lower border of the medial epicondyle down to the medial malleolus is one chi three cun. From the medial malleolus down to the ground is three cun. From the knee down to the dorsum of the foot is one chi six cun. From the dorsum of the foot down to the ground is three cun. From the axilla down to the vertebral column is one chi. The part running through the axilla that is not visible is four cun long. From the axilla down to the costal margin is one chi two cun. From the costal margin down to the hip pivot is six cun. From the hip pivot down to the middle of the knee is one chi nine cun. From the knee down to the lateral malleolus is one chi six cun. From the lateral malleolus down to Jinggu is three cun. From Jinggu down to the ground is one cun. From Dazhui to the coccyx on the back consists of twenty-one segments, folded to make three chi. Each segment obtains one cun four fen, with the remainder kept in the lower seven segments. For horizontal cun, approximately take the spinal bone on the back as one cun horizontally opened. Between the two breasts on the abdomen, fold to eight cun. Horizontal cun follows this standard. From the xiphoid process down to the umbilicus is seven cun. Without the xiphoid process, take from the bifurcation of the sternum down to the umbilicus as seven cun. Vertical cun follows this standard. Below the umbilicus, measure using vertical cun. On the hand, from the tip of the middle finger to the proximal interphalangeal joint is four and a half cun. From this joint to the wrist is four cun. From the wrist to the elbow is one chi two and a half cun. From the elbow to the shoulder is one chi seven cun. It can be seen that the common practice of taking the middle joint of the middle finger as one cun is erroneous. This is what is called the "same-body cun" (Tongshen Cun). Regardless of whether one is seven chi tall like Tang, nine chi tall like King Wen, or nine chi four cun tall like Zeng Jiao, whether fat, thin, or a dwarf, all follow the dimensions determined in Ling Shu to measure the acupoints. Not only is the term "same-body" clear and unquestionable, but ancient and modern times can also be unified. Why do people nowadays dislike complexity and prefer simplicity, failing to read Ling Shu, thus causing patients to suffer the pain of branding without guilt? How cruel!