六经所以分手足阴阳者。以足为本。手为标。如足厥阴风木肝与足少阳相火胆为表里。
同在
至于
常度
而长
关上
厥阴
口。
太阳
密移
之至
太阴
之至
（一
云浮
在泉
曰北
少阴
天则
为太
不
自
左手关前一分为人迎者。以候寒暑燥湿风热中伤于人。其邪咸自脉络而入。以迎纳之。
故曰
风喜
故不别论。以类推之。风当自少阳入。湿当自阳明入。暑当自三焦入。寒邪自太阳入。故经
曰。
皆
不
者
皆弦浮而散。弦者足少阳脉也。浮者伤风脉也。散者病至也。其证身热恶风自汗项强筋满。
手少阳伤暑。右手尺中与人迎。皆洪虚而数。洪者手少阳脉也。虚者伤暑也。数者病增也。
其证身热恶寒头痛状如伤寒烦渴。足太阴伤湿。右手关上与人迎。皆濡细而沉。濡者足太阴
脉也。细者湿脉也。沉者病着也。其证身重脚弱关节烦疼冷痹胀满。足少阴伤寒。左尺中与
人迎。皆沉紧而数。沉者足少阴脉也。紧者寒脉也。数者病传也。其证口燥舌干而渴。皆恶
寒反热倦怠。足厥阴伤风。左关上与人迎皆弦弱而急。弦者足厥阴脉也。弱者风脉也。急者
病变也。其证自汗。恶风而倦。小腹急痛。手厥阴心包伤暑。左右尺中与人迎。皆沉弱而缓
。沉者心包脉也。弱者伤暑也。缓者病倦也。其证往来寒热。状如 疟烦渴眩晕背寒面垢。
此乃分布六经感伤外邪。除燥热外。今叙此二气。以为征兆。若其传变。自当根据六经别论所
伤。随经说证施治。或燥热伤心肺。当根据经推明理例调治。如四气兼并。六经交错。亦当随
其脉证。审处别白。或先或后。或合或散。在络在经。在表在里。四时之动。脉与之应。气
候以时。自与脉期。微妙在脉。不可不察。察之有纪。从阴阳始。始之有因。从阴阳生。此
之谓也。
The reason why the Six Channels (Liu Jing, 六经) are distinguished into Hand and Foot meridians is that the Foot meridians serve as the root (Ben, 本), while the Hand meridians serve as the branch (Biao, 标). For instance, the Foot Jueyin Wind-Wood Liver (Zu Jueyin Gan, 足厥阴肝) and the Foot Shaoyang Ministerial-Fire Gallbladder (Zu Shaoyang Dan, 足少阳胆) form an interior-exterior relationship.
Regarding the standard measure and length, Guan (Cun-Guan-Chi position on the wrist) Jueyin mouth. Taiyang moves densely to reach Taiyin's arrival (One cloud floats in the underground, said North, Shao Yin Heaven then becomes Tai not).
The point one division before the Guan on the left hand is called Yingying (Human Welcome pulse), used to observe how Cold, Summerheat, Dryness, Dampness, Wind, and Heat pathogenic factors injure the human body. These pathogens all enter through the collaterals and vessels, being welcomed and received by this pulse site.
Therefore it is said that Wind favors... thus no separate discussion is made; by analogy: Wind pathogen should enter from the Shaoyang channel; Dampness pathogen should enter from the Yangming channel; Summerheat pathogen should enter from the Sanjiao (Triple Burner); Cold pathogen enters from the Taiyang channel. Thus the classic states... all... those... all present Xian (Wiry), Fu (Floating), and San (Scattered) pulses. The Xian pulse is the pulse of the Foot Shaoyang channel; the Fu pulse is the pulse of Wind injury; the San pulse indicates the disease has arrived. The symptoms manifest as fever, aversion to wind, spontaneous sweating, stiffness of the neck, and fullness of the sinews.
When the Hand Shaoyang channel is injured by Summerheat, both the Chi position and Yingying pulse on the right hand present Hong (Surging), Xu (Deficient), and Shu (Rapid) pulses. The Hong pulse is the pulse of the Hand Shaoyang channel; the Xu pulse indicates Summerheat injury; the Shu pulse indicates worsening of the disease. The symptoms manifest as fever, aversion to cold, headache, resembling Taiyang syndrome, irritability, and thirst.
When the Foot Taiyin channel is injured by Dampness, both the Guan position and Yingying pulse on the right hand present Ru (Soggy), Xi (Fine), and Chen (Deep) pulses. The Ru pulse is the pulse of the Foot Taiyin channel; the Xi pulse is the pulse of Dampness; the Chen pulse indicates the pathogen is entrenched. The symptoms manifest as heaviness of the body, weakness of the legs, painful and vexing joints, cold bi-syndrome (painful obstruction), and distension/fullness.
When the Foot Shaoyin channel is injured by Cold, both the Chi position and Yingying pulse on the left hand present Chen (Deep), Jin (Tight), and Shu (Rapid) pulses. The Chen pulse is the pulse of the Foot Shaoyin channel; the Jin pulse is the pulse of Cold; the Shu pulse indicates transmission of the disease. The symptoms manifest as dry mouth, dry tongue with thirst, aversion to cold with counter-heat, and fatigue/lack of strength.
When the Foot Jueyin channel is injured by Wind, both the Guan position and Yingying pulse on the left hand present Xian (Wiry), Ruo (Weak), and Ji (Rapid/Tense) pulses. The Xian pulse is the pulse of the Foot Jueyin channel; the Ruo pulse is the pulse of Wind; the Ji pulse indicates pathological change. The symptoms manifest as spontaneous sweating, aversion to wind with fatigue, and acute pain in the lower abdomen.
When the Hand Jueyin Pericardium channel is injured by Summerheat, both the Chi positions and Yingying pulse on the left and right hands present Chen (Deep), Ruo (Weak), and Huan (Slow/Lax) pulses. The Chen pulse is the pulse of the Pericardium channel; the Ruo pulse indicates Summerheat injury; the Huan pulse indicates disease-related fatigue. The symptoms manifest as alternating chills and fever, resembling Malaria (Nue, 疟), irritability, thirst, vertigo, coldness of the back, and a greasy appearance of the face.
This describes the distribution of the Six Channels receiving external pathogens. Excluding Dryness and Heat, we now narrate these two qi (factors) as omens/signs. If the disease transmits, it naturally follows the injuries described in the separate discussions of the Six Channels, treating according to the channel and presenting symptoms. Or if Dryness and Heat damage the Heart and Lungs, one must deduce the principles based on the channels for regulation and treatment. If the Four Qi (pathogens) combine and the Six Channels interweave, one must also follow the pulse and symptoms to examine and distinguish carefully. Whether first or later, combined or dispersed, in collaterals or channels, in exterior or interior. The movements of the four seasons correspond with the pulse. Climate changes with time, naturally aligning with the pulse period. The subtlety lies in the pulse, which must not be neglected. Examination of the pulse has its discipline, starting from Yin and Yang. The origin of the start arises from Yin and Yang. This is what is meant.