HT-04 (Ling Dao) Spirit Pathway

What does HT-04 Ling Dao do?

HT-04 calms the spirit and benefits the voice, and it relaxes the muscles and sinews — and it is the Jing-River and Metal point of the Heart channel, whose voice action reflects both classifications at once.

• Calms the spirit and benefits the voice — the spirit action of a Heart point, and a voice action explained below
• Relaxes the muscles and sinews — the action behind its cramping-arm indication

Why a Heart point benefits the voice — and why its element and category both point to it. HT-04 is the Jing-River point of the channel, and the Jing-River points are classically indicated for voice and cough — disorders of the throat and the breath. It is also the channel’s Metal point, and Metal is the element of the Lung, which governs the voice. So the voice action sits at the meeting of two classifications: the Jing-River category and the Metal element, both of which independently point at the throat. That double correspondence is uncommon and worth stating.

Its five-shu role: the controlling element, and therefore no named role. The Heart is a yin Fire channel, and HT-04 is its Metal point — and Fire controls Metal, so HT-04 is the controlling-element point, none of tonification, sedation or horary. The full Heart series, from our data: HT-09 Wood (tonification), HT-08 Fire (horary), HT-07 Shen Men Earth (sedation, and Yuan-Source), HT-04 Metal (controlling element, this point), HT-03 Water. Our KI-02 record sets out the same controlling-element logic on another channel.

On the name, which is apt. “Ling Dao” means Spirit Pathway or Spirit Path — ling spirit, dao a path or way, the same dao as in DU-11 Shen Dao (Spirit Path) and DU-13 Tao Dao. For a Heart-channel point — the Heart housing the shen, the spirit — whose action calms the spirit, a name meaning “spirit pathway” is a genuine fit.

Source: Sacred Lotus sources & references (channel, element, action and translation records; the full Heart five-shu series queried and HT-04 confirmed the Metal/controlling-element point, and the DU-11, HT-07 and KI-02 records checked, against our own data), cross-referenced against multiple online sources.

What is HT-04 Ling Dao used for?

HT-04 is used for cardiac pain, cramping pain of the elbow and arm, and sudden loss of voice. Our own indication record is reproduced here in full — three entries.

• Cardiac pain
• Spasmodic pain of the elbow and arm
• Sudden loss of voice

Sudden loss of voice is the entry that expresses the point’s classifications. As the Jing-River and Metal point, HT-04 is a classical point for acute voice loss — the voice being both a Jing-River indication and a Metal/Lung concern. It is uncommon for a Heart-channel point to treat the voice, and where the classifications explain the indication this library points to it.

An honest note. CARDIAC PAIN IS A MEDICAL EMERGENCY — chest pain with breathlessness, sweating, or pain spreading to the arm or jaw requires emergency care immediately, and the Heart channel’s course down the arm is where cardiac pain classically radiates. SUDDEN LOSS OF VOICE REQUIRES ASSESSMENT if it persists or has no obvious cause — sudden hoarseness or aphonia can follow a stroke, a nerve palsy, or a laryngeal problem, and a hoarse voice lasting more than three weeks always needs assessment. This record documents classical use only, and nothing here should delay care.

How it is combined. With HT-07 Shen Men, the Yuan-Source and sedation point, 1.5 cun distal, for the cardiac and spirit indications. With HT-05 Tong Li, the Luo-Connecting point, half a cun distal — also a classical voice point on this channel. With REN-23 Lian Quan at the throat for the voice. All held here.

Source: Sacred Lotus sources & references (indication and action records; the HT-05, HT-07 and REN-23 records queried from our own data), cross-referenced against multiple online sources.

Where is HT-04 Ling Dao located?

HT-04 is on the inner wrist side of the forearm, an inch and a half above HT-07, on the thumb side of the tendon at the ulnar edge of the wrist.

• 1.5 cun proximal to HT-07 Shen Men
• On the radial (thumb) side of the tendon of flexor carpi ulnaris — the tendon at the little-finger edge of the front of the wrist
• HT-05 Tong Li lies between them at 1 cun above HT-07; HT-06 Yin Xi at 0.5 cun

Four Heart points share one landmark within an inch and a half of the wrist. HT-07 Shen Men at the wrist crease, HT-06 Yin Xi at 0.5 cun, HT-05 Tong Li at 1 cun, HT-04 at 1.5 cun — all on the radial side of the same flexor carpi ulnaris tendon, distinguished by measurement alone. And they carry four different classifications: Shu-Stream/Yuan/sedation, Xi-Cleft, Luo-Connecting, and Jing-River/controlling-element. As on the Pericardium wrist and the fifth metatarsal, mistaking one for a neighbour substitutes a category — and here, three of the four are within a single cun.

The tendon is the landmark, and it is a good one. Flexor carpi ulnaris stands out at the ulnar edge of the wrist when the wrist is flexed against resistance, and the Heart points sit just to its radial side. No counting chain is needed.

On the name. “Ling Dao” — Spirit Pathway, a fitting name for a spirit-calming point of the Heart channel.

Source: Sacred Lotus sources & references (location and translation records, retained unchanged; the HT-05, HT-06 and HT-07 records queried from our own data).

• A Manual of Acupuncture (p. 215): On the radial side of the tendon of flexor carpi ulnaris, 1.5 cun proximal to Shenmen HE-7.
• Chinese Acupuncture and Moxibustion (p. 165): When the palm faces upward, the point is on the radial side of the tendon of m. flexor carpi ulnaris, 1.5 cun above the transverse crease of the wrist.

How is HT-04 Ling Dao needled?

Our own record states perpendicular insertion of 0.3–0.5 inch, with moxibustion applicable. What follows is a neutral record of what the reference literature documents. It is not instruction, and this page does not teach technique.

• Angle and depth as recorded: perpendicular, 0.3–0.5 inch.
• Moxibustion: recorded as applicable.
• Regional anatomy: the tendon of flexor carpi ulnaris lies just ulnar to the point; the ulnar nerve and ulnar artery run together on the ulnar side of the forearm, deep to and alongside that tendon; the ulna lies deep.

Hazard, stated proportionately. There is no body cavity here and no organ. The relevant structures are the ulnar nerve and artery, which run on the ulnar side of the flexor carpi ulnaris tendon — the other side of the tendon from where our record places the point, which is on its radial border. That the point sits on the radial side of the tendon keeps it away from the neurovascular bundle, which is why the side is specified in the location. Our record carries no arterial caution — nine points in the library do, counted by query, and HT-04 is not among them.

What is not claimed. No study measuring a safe depth at HT-04 could be located, and none is borrowed. Neither measured-depth study this library uses reaches the forearm. No case report naming HT-04 was located.

Source: Sacred Lotus sources & references (needling record, retained unchanged; the nine arterial cautions queried from our own data), cross-referenced against multiple online sources; regional anatomy from standard anatomical description.

Is there research on HT-04, and what should a reader know?

No trial isolates HT-04. Where the point appears it is one component of a cardiac, anxiety or voice protocol, and a study that includes a point in a protocol is not evidence about that point.

What this page can state with confidence. HT-04 is the Jing-River and Metal point of the Heart channel, and because the Heart is a yin Fire channel and Fire controls Metal, it is the controlling-element point — none of tonification (HT-09), sedation (HT-07) or horary (HT-08). Its voice indication is explained by both its classifications at once: the Jing-River category treats voice and cough, and the Metal element is the Lung’s, which governs the voice. And it sits in a crowded stretch — four Heart points within 1.5 cun of the wrist, three within a single cun — where confusing neighbours substitutes a five-shu category.

The cardiac warning is the operative content. Cardiac pain is an emergency, and it radiates down the very arm this channel runs.

A note on searching for it. “HT 4”, “HE 4”, “H 4” and “Lingdao” searches return protocol trials and unrelated material — and this channel is coded several ways: HT, HE and H. Our library uses HT-. Any claim attached to this point should be checked against what a study actually used.

Source: Sacred Lotus sources & references (element, action, indication and location records; the Heart five-shu series and the four wrist points queried, against our own data).