\r手太阳小肠图\p06-d32a13.bmp\r
《平人绝谷》篇曰，小肠大二寸半，径八分分之少半，长三丈一尺，受谷二十四升，水六升三合合之大半。《肠胃》
篇曰∶小肠后附脊，左环回周叠积。其注回肠者，外附于脐上，回运环十六曲，大二寸半，径八分分之少半，长三丈三
尺。《素问》曰∶小肠者，受盛之官，化物出焉。《本脏》篇曰∶心应脉，皮浓者脉浓，脉浓者小肠浓；皮薄者脉薄，脉
薄者小肠薄。皮缓者脉缓，脉缓者小肠大而长；皮薄而脉波小者，小肠小而短。诸阳脉皆多纡结者，小肠结。
小肠穴十九中，路从少泽，步前谷后溪之隆；道遵腕骨，观阳谷养老之崇。得支正于少海，逐肩贞以相从，值 俞
兮遇天宗，乘秉风兮曲垣中，肩外俞兮肩中俞，启天窗兮见天容。匪由颧 ，易造听宫？
小指端外为少泽，前谷外侧节前觅，节后捏拳取后溪，腕骨腕前骨陷侧，兑谷下陷阳谷论，腕上一寸名养老，支正
腕后量五寸。少海肘端五分好，肩贞胛下两骨解， 俞大骨下陷者（大骨下，胛上廉，举臂取之），天宗秉风后骨陷，
秉风 外举有空（天 外，肩上 后，举臂有空），曲垣肩中曲胛陷。外俞胛后一寸从（即外肩俞，肩胛上廉，去脊三寸），
肩中二寸大杼旁，天窗扶突后陷详（颈大筋间前曲颊下，扶突后动脉应手陷中），天容耳下曲颊后，颧 面 锐端量
（面 骨下廉，锐骨端陷中），听宫耳端大如菽（耳中珠子大如赤小豆），此为小肠手太阳（左右共三十八穴）。
\r手太阳小肠经之图\p06-d32a14.bmp\r
手太阳小肠经腧穴图
《平人绝谷》篇记载：小肠的宽度为二寸半，直径为八分又三分之一分（即八分少半），长度为三丈一尺，能容纳谷物二十四升，水六升三合加上大半合。《肠胃》篇记载：小肠后方附着于脊柱，向左环绕并重叠堆积。其连接回肠的部位，外部附着于脐上，回肠运转环绕十六个弯曲处，宽度为二寸半，直径为八分又三分之一分，长度为三丈三尺。《素问》说：小肠是受盛之官，负责将食物转化为精微物质。《本脏》篇说：心与脉相应，皮肤厚的人脉也厚，脉厚的人小肠也厚；皮肤薄的人脉也薄，脉薄的人小肠也薄。皮肤松弛的人脉也松弛，脉松弛的人小肠大而长；皮肤薄且脉搏微弱细小的人，小肠小而短。各阳经的脉象如果多有迂曲结滞的现象，说明小肠有结滞。
手太阳小肠经共有十九个穴位，路线从少泽穴开始，经过前谷、后溪所在的隆起部位；道路遵循腕骨穴，观察阳谷、养老穴的高耸之处。在少海穴处得到支正穴的辅助，沿着肩贞穴相随，遇到俞穴和天宗穴，乘坐秉风穴进入曲垣穴之中，肩外俞穴和肩中俞穴相连，开启天窗穴便可见到天容穴。如果不经过颧髎穴，怎能到达听宫穴呢？
小指外侧端是少泽穴，在前谷穴外侧、掌指关节前的凹陷处寻找；在节后握拳时取后溪穴；腕骨穴位于腕前骨的凹陷侧面；兑谷（即神门穴）下方的凹陷处即为阳谷穴；腕横纹上一寸处名为养老穴；支正穴在腕后五寸处测量。少海穴在肘端内侧五分处较好；肩贞穴在肩胛骨下两骨缝之间；俞穴在大骨下的凹陷处（大骨之下，肩胛上缘，举臂时取穴）；天宗穴在秉风穴后的骨凹陷处；秉风穴在外侧举臂时有空隙（天宗穴之外，肩上之后，举臂有空隙）；曲垣穴在肩中部肩胛骨的凹陷处。外俞穴在肩胛后一寸处跟随（即外肩俞，位于肩胛上缘，距离脊柱三寸）；肩中俞穴在第二胸椎棘突下旁开二寸，大杼穴旁边；天窗穴在扶突穴后的凹陷处详细定位（颈大筋间，前曲颊下方，扶突穴后动脉应手的凹陷中）；天容穴在耳下曲颊后方；颧髎穴在面颊骨下廉，锐骨端的凹陷处测量；听宫穴在耳端，大小如赤小豆。这些属于手太阳小肠经的穴位（左右共三十八穴）。
手太阳小肠经之图
Figure of the Hand-Taiyang Small Intestine Meridian Acupoints
The chapter "Ping Ren Jue Gu" (On the Normal Person Fasting) states: The small intestine has a width of two and a half cun, a diameter of eight fen plus one-third of a fen, and a length of three zhang and one chi. It can hold twenty-four sheng of grain and six sheng and three he plus more than half a he of water. The chapter "Chang Wei" (On the Stomach and Intestines) states: The small intestine is attached posteriorly to the spine, looping to the left and accumulating in overlapping layers. Its connection to the ileum is externally attached above the navel; the ileum rotates and loops sixteen times, with a width of two and a half cun, a diameter of eight fen plus one-third of a fen, and a length of three zhang and three chi. The *Su Wen* (Basic Questions) says: The small intestine is the official of reception and transformation, responsible for transforming substances. The chapter "Ben Zang" (On the Root Viscera) states: The Heart corresponds to the vessels. If the skin is thick, the vessels are thick; if the vessels are thick, the small intestine is thick. If the skin is thin, the vessels are thin; if the vessels are thin, the small intestine is thin. If the skin is lax, the vessels are lax; if the vessels are lax, the small intestine is large and long. If the skin is thin and the pulse is weak and small, the small intestine is small and short. If all Yang meridians show multiple tortuous and knotted pulses, it indicates stagnation in the small intestine.
There are nineteen acupoints on the Hand-Taiyang Small Intestine Meridian. The route starts from Shaose (SI1), proceeding through the prominences of QianGu (SI2) and Houxi (SI3); the path follows Wangu (SI4), observing the elevation of YangGu (SI5) and Yanglao (SI6). At Shaohai (SI8), one receives the assistance of Zhizheng (SI7), following along Jianzhen (SI9). Encountering Shu (likely referring to Shanzhong or a specific point contextually linked, though text implies sequence) and Tianzong (SI11), one rides Bingfeng (SI12) into Qu Yuan (SI13). Jianwai Shu (SI14) and Jianzhong Shu (SI15) connect; opening Tian Chuang (SI16) reveals Tian Rong (SI17). Without passing through Quan Liao (SI18), how can one reach Ting Gong (SI19)?
Shaose (SI1) is at the outer end of the little finger. QianGu (SI2) is sought on the lateral side, anterior to the metacarpophalangeal joint. Houxi (SI3) is taken by making a fist after the joint. Wangu (SI4) is located in the depression on the lateral side of the bone anterior to the wrist. Dui Gu (referring to Shenmen HT7 or local depression) below leads to the discussion of YangGu (SI5) in the depression. One cun above the wrist crease is named Yanglao (SI6). Zhizheng (SI7) is measured five cun behind the wrist. Shaohai (SI8) is best located five fen medial to the elbow end. Jianzhen (SI9) is between the two bones below the scapula. Shu (contextual) is in the depression under the large bone (under the large bone, upper edge of the scapula, take when raising the arm). Tianzong (SI11) is in the bony depression posterior to Bingfeng (SI12). Bingfeng (SI12) has an empty space when raised laterally (lateral to Tianzong, posterior to the shoulder, empty space when raising the arm). Qu Yuan (SI13) is in the depression of the middle of the scapula. Waishu (SI14) follows one cun posterior to the scapula (i.e., Waishan Yu, upper edge of the scapula, three cun from the spine). Jianzhong Shu (SI15) is two cun lateral to Dazhu (BL11) at the second thoracic vertebra. Tian Chuang (SI16) is detailed in the depression posterior to Futu (LI18) (between the large tendons of the neck, below the anterior jaw angle, in the depression where the artery beats posterior to Futu). Tian Rong (SI17) is posterior to the curved jaw below the ear. Quan Liao (SI18) is measured at the sharp end of the cheekbone (lower edge of the facial bone, in the depression at the sharp bone end). Ting Gong (SI19) is at the end of the ear, as large as a red mung bean. These belong to the Hand-Taiyang Small Intestine Meridian (thirty-eight acupoints in total, left and right combined).
Figure of the Hand-Taiyang Small Intestine Meridian