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Alternate names: 本池 běn chí, Root Pool; 喉中 hóu zhōng, Larynx Center; 舌本 shé běn, Tongue Root

Channel: CV, Controlling (rèn) Vessel

Modern location: An acupoint located on the anterior aspect of the neck, immediately superior to the hyoid bone on the midline.

Classic location: When the head is tilted back, the point is directly above Celestial Chimney (CV-22), midway between the chin and the laryngeal prominence (Adam's apple), below the root of the tongue. Find the point in supine posture. (Yī Zōng Jīn Jiàn)

Local anatomy: The anterior jugular vein. The branch of the cutaneous cervical nerve, the hypoglossal nerve, and the branch of the glossopharyngeal nerve.

Action: Disinhibits the throat and eliminates phlegm; clears fire and downbears counterflow.

Modern indications: Subglossal swelling and pain; slack tongue and drooling; stiff tongue preventing speech; fulminant loss of voice; difficulty in swallowing.

Classic indications: Cough and qì ascent; panting and retching of foam; swelling of the subglossal region with difficulty in speech; contraction of the root of the tongue; drooling; dispersion-thirst; mouth sores; clenched jaw.

Needle stimulus: Needling: With the head tilted back, 0.3‒1.0 cùn upward oblique insertion (with the needle pointed towards GV-17). Moxa: pole 5‒20 min.

Needle sensation: Numbness and distension at the root of the tongue.

Warning: Direct moxibustion is contraindicated at this point.

Point groups: Intersection point (jiāo huì xué) of the conception and yīn linking vessel (yīn wéi mài)s.

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