Acupuncture Points Notebook

: Chongyang : Rushing Yang

St-42 : Foot Yangming Stomach 42

Classifications:
Yuan-Source point
Exit point to Yinbai Sp-1

Trigger point (Travell & Simons, 1998, Trigger Point Manual)

Location:
On the dorsum of the foot, in the depression formed by the junction of the second and third metatarsal bones and the cuneiform bones (second and third), 1.5 cun distal to Jiexi St-41, on the line drawn between Jiexi St-41 and Xiangu St-43, at the point where the pulsation of the dorsalis pedis artery may be palpated.

Needling:
Oblique or perpendicular insertion 0.3 - 0.5 cun

Warning:
Care should be taken not to puncture the dorsalis pedis artery which lies beneath this point


TCM Actions:
Clears heat from the stomach channel
Harmonises the stomach fu
Calms the spirit
Activates the channel and alleviates pain

TCM Indications:
  • Deviation of the mouth and eye, swelling and pain of the face, swelling of the face, toothache, tooth decay, heat and pain of the inside of the mouth.
  • Abdominal distension with no pleasure in eating, epigastric pain, vomiting.
  • Fever with absence of sweating, chills and fever with malarial disorder.
  • Mania-depression, desires to ascend to high places and sing, discards clothing and runs around.
  • Swelling and pain of the dorsum of the foot, atrophy disorder of the foot.

    Neuroanatomy:
    Superficial Innervation: Superficial peroneal nerve from L4 - S1
    Dermatome Segment: L5

    Trigger Point Associations:
    Muscle: Extensor hallucis brevis
    Myotome Innervation: Lateral terminal branch of deep fibular (peroneal) nerve (S1 - S2)
    Pain Referral Pattern: Around point
    Indications: Foot strain

    Notes:
    Location of dorsalis pedis pulse

    This point is also on the 5th trajectory of the Chong mai relating to digestive functions (Yuen, 2005, The Extraoridinary Vessels).

    When combined with Renying St-9 and Taixi Kid-3 (dispersing) this point relates to the Fifth Level of Manifestation of the Soul or the Vishuddha chakra concerned with true expression of yourself as an Authentic Character or Realized Being (Yuen, 2005, 3 Spirits & 7 Souls).

    In Tung acupuncture this point is called Men Jin Gate of Gold, and often combined with Zusanli St-36 for most Stomach channel and digestive problems (Chu, 2015).

    Medieval phlebotomy point (John de Foxton, 1408: Liber Cosmographiae, maa.cam.ac.uk)

    In Tibetan medicine:
    Moxa point (AMNH, Tibetan Medical Paintings)


    Reference Notes: (click to display)