tantra of direct transmission (instruction); oral tradition tantra [on medicine]. the Oral Instruction Tantra [in medicine]
Oral Tradition Tantra [the third of the Four (Medical) Tantras] Comment: The third of the Four [Medical] Tantras (rgyud bzhi) is an extensive technical textbook that identifies the different types of disorders--their causation (etiology), nature (pathology), and therapy. It presents each of the major disorders individually and in great detail--discussing their causes, conditions, and symptoms as well as the methods of treatment to be used.