黄帝曰。经脉十二。而手太阴足少阴阳明独动不休。何也。岐伯曰。是明胃脉也。（言诸动脉皆胃气所贯也故下文三
项皆跟定胃字）胃为五脏六腑之海。其清气上注于肺。肺气从太阴而行之其行也。以息往来。故人一呼脉再动。一吸脉
亦再动。呼吸不已。故动而不止。黄帝曰。气之过于寸口也。上出焉息。下入焉伏。（出入原作十八今从甲乙经改）何道
从还。不知其极。岐伯曰。气之离脏也。卒然如弓弩之发。如木之下。岸上于鱼以反衰。其余气衰散以逆上。故其行微。
黄帝曰。足之阳明。何因而动。岐伯曰。胃气上注于肺。其悍气上冲头者。循咽。上走空窍。循眼系。入络脑。出 。
下客主人。循牙车。合阳明。并下人迎。此胃气别走于阳明者也。故阴阳上下。其动也。若一故阳病而阳脉小者。为逆
阴病而阴脉大者。为逆。故阴阳俱静。俱动。若引绳相倾者病。黄帝曰。足少阴何因而动。岐伯曰。冲脉者。十二经之
海也。与少阴之大络。起于肾。下出于气街。循阴股内廉。邪入 中。循胫骨内廉。并少阴之经。下入内踝之后。入足
下。其别者。邪入踝。出属跗上。入大趾之间。注诸络以温足胫。此脉之常动者也。黄帝曰。营卫之行也。上下相贯。
如环之无端。今有其卒然遇邪气及逢大寒。手足懈惰。其脉阴阳之道。相输之会。行相失也。气何由还。岐伯曰。夫四
末阴阳之会者。此气之大络也。四街者。气之径路也。故络绝。则径通四末解。则气从合相输如环。黄帝曰。善。此所
谓如环无端。莫知其纪。终而复始。此之谓也。
前三节分叙脉气之源流。后节总叙经气之变。气充词沛机神流畅。据此则人迎果绑定喉两旁动脉矣。与寸口分阴阳。
以大小分顺逆。后世实难遵用。
黄帝说：十二经脉中，唯独手太阴肺经和足少阴肾经、足阳明胃经的脉搏跳动不停息，这是为什么呢？
岐伯回答说：这是因为它们是反映胃气的脉象。（意思是说所有的动脉都贯穿着胃气，所以下文三项论述都紧扣“胃”字。）胃是五脏六腑营养物质的海洋。其中清轻的精微之气向上注入于肺，肺气沿着手太阴肺经运行。它的运行，随着呼吸而往来不息。所以人每呼一次气，脉搏跳动两次；每吸一次气，脉搏也跳动两次。呼吸不停止，脉搏也就跳动不止。
黄帝说：脉气在寸口部位过于旺盛时，向上出于咽喉（原文作“十八”，现依据《甲乙经》改为“焉息”），向下潜入体内（原文作“十八”，现依据《甲乙经》改为“焉伏”）。它通过什么道路返回呢？我不明白其中的极限所在。
岐伯回答说：脉气离开脏腑时，突然之间就像弓弩发射箭矢一样迅猛，又像树木从高处坠落。等到到达鱼际穴附近时，气势反而衰退，其余的气散乱并逆向上行，所以脉气运行的力量变得微弱。
岐伯回答说：胃气向上注入于肺。其中剽悍滑利之气向上冲至头部，沿着咽喉，上行进入五官七窍，沿着眼系，进入脑部联络，出于项后，下行经过客主人穴（上关穴），沿着下颌角（牙车），汇合于足阳明胃经，并下行至人迎穴。这就是胃气别道而行走向足阳明经的缘故。因此，无论阴阳上下，其搏动的规律是一致的。所以，阳病而阳脉反小，属于逆证；阴病而阴脉反大，也属于逆证。如果阴阳脉象都静止不动，或者都躁动不安，且像拉紧的绳子一样相互倾斜失衡，那就是病态。
岐伯回答说：冲脉是十二经脉的海，称为“十二经之海”。它与足少阴肾经的大络，起始于肾脏，向下出于气街穴，沿着大腿内侧下行，斜入腘窝中，沿着胫骨内侧，与足少阴肾经并行，向下进入内踝后方，再进入足底。其中分支，斜入踝部，出于足背，进入大脚趾之间，注入各络脉以温养足胫。这是该脉常有的搏动现象。
黄帝说：营气和卫气的运行，上下贯穿，如同圆环没有端点。现在如果遇到邪气突然侵袭，或遭遇严寒，导致手足懈怠无力，此时脉象中阴阳之道，以及气血输注交会之处，运行失序，气是如何恢复循环的呢？
岐伯回答说：四肢末端是阴阳之气交会的地方，这是气的大络所在。四街（头、胸、腹、胫四个气街部位）是气运行的径路。所以，如果络脉闭塞，则径路通畅；如果四肢懈怠，气就会从合会之处重新汇聚，像圆环一样循环往复。
黄帝说：讲得好。这就是所说的如环无端，不知道它的起点和终点，终结后又重新开始，说的就是这种情况。
前三节分别叙述了脉气产生的源头和流变，最后一节总述经气的变化。文章气势充沛，机理神妙流畅。据此可知，人迎穴确实对应喉旁两侧的动脉，与寸口脉分属阴阳，以脉的大小来区分顺逆。后世医家实在难以完全遵循这种用法。
Huangdi said: Among the twelve meridians, only the Hand-Taiyin (Lung) and Foot-Shaoyin (Kidney), Foot-Yangming (Stomach) meridians pulse continuously without rest. Why is this so?
Qibo replied: This is because they reflect the Stomach Qi. (This implies that all pulsating arteries are permeated by Stomach Qi; hence, the following three sections all center on the character "Stomach".) The Stomach is the sea of the five zang organs and six fu organs. Its clear and subtle essence ascends to pour into the Lungs. Lung Qi travels along the Hand-Taiyin meridian. Its movement comes and goes with respiration. Therefore, with each exhalation, the pulse beats twice; with each inhalation, the pulse also beats twice. As long as respiration does not cease, the pulse continues to beat.
Huangdi said: When Qi overflows at the Cun Kou (Radial Artery) point, it emerges upward toward the throat (originally "shi ba", corrected here from *Jia Yi Jing* to "yan xi") and sinks downward into the interior (originally "shi ba", corrected here from *Jia Yi Jing* to "yan fu"). Through what pathway does it return? I do not understand its limits.
Qibo replied: When Qi departs from the Zang organs, it moves suddenly and swiftly like an arrow released from a crossbow, or like a tree falling from a height. By the time it reaches the Yu Ji area, its momentum declines; the remaining Qi scatters and flows upward in reverse, so its movement becomes faint.
Huangdi said: What causes the Foot-Yangming (Stomach) meridian to pulse continuously?
Qibo replied: Stomach Qi ascends to pour into the Lungs. Its fierce and vigorous Qi rushes upward to the head, traveling along the pharynx, ascending into the orifices, following the optic system, entering the brain to connect with it, emerging from the nape, descending past the Ke Zhu Ren point (Shangguan), following the jaw angle (Ya Che), merging with the Foot-Yangming meridian, and descending further to the Ren Ying point. This is how Stomach Qi takes a separate route to the Yangming meridian. Thus, whether in Yin or Yang, upper or lower, their pulsation follows a consistent pattern. Therefore, if Yang disease presents with a small Yang pulse, it is a counterflow (Ni); if Yin disease presents with a large Yin pulse, it is also a counterflow. If both Yin and Yang pulses are still, or both are hyperactive, and they tilt against each other like a taut rope, this indicates disease.
Huangdi said: What causes the Foot-Shaoyin (Kidney) meridian to pulse continuously?
Qibo replied: Chong Mai (Penetrating Vessel) is the sea of the twelve meridians. It connects with the large collateral of the Foot-Shaoyin meridian, originating in the Kidneys, descending to emerge at the Qi Jie point, running along the medial aspect of the thigh, obliquely entering the popliteal fossa, following the medial aspect of the tibia, running parallel with the Foot-Shaoyin meridian, descending behind the medial malleolus, and entering the sole of the foot. A branch obliquely enters the ankle, emerges on the dorsum of the foot, enters between the great toe, and pours into the various collaterals to warm the legs and feet. This is the normal pulsation of this vessel.
Huangdi said: Ying Qi (Nutritive Qi) and Wei Qi (Defensive Qi) circulate up and down, interweaving like a circle without beginning or end. Now, if one encounters sudden pathogenic factors or severe cold, leading to flaccidity and weakness of the limbs, the pathways of Yin and Yang in the pulses, and the points of transmission and convergence, become disordered. How does Qi return to circulation?
Qibo replied: The four extremities are where Yin and Yang Qi converge; these are the major collaterals of Qi. The Si Jie (Four Streets: Head, Chest, Abdomen, Legs) are the direct routes of Qi. Therefore, if the collaterals are blocked, the direct routes remain open; if the limbs are weak, Qi gathers from the convergence points and circulates like a circle.
Huangdi said: Excellent. This is what is meant by "like a circle without end," having no known start or finish, ending only to begin again. This is precisely what is described.
The first three sections separately narrate the source and flow of pulse Qi, while the final section summarizes the changes of meridian Qi. The prose is vigorous, the mechanism profound, and the logic fluent. Based on this, the Ren Ying point indeed corresponds to the carotid artery on either side of the throat, distinguishing Yin and Yang from Cun Kou, and determining favorable or unfavorable prognoses based on pulse size. It is difficult for later generations to strictly adhere to this usage.