Balanced ligamentous tension (also known as balanced ligamentous tension release, ligamentous articular strain, or simply BLT) is both an indirect and direct technique used in osteopathic manipulative medicine.
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History
The technique was reportedly invented by A.T. Still. It was later described by his students Rebbecca Lippincott and William Garner Sutherland, who greatly expanded it. It was described in “Osteopathic Technique of William G. Sutherland,” which was published in the 1949 Year Book of Academy of Applied Osteopathy. According to Sutherland’s model, all the joints in the body are balanced ligamentous articular mechanisms. The ligaments provide proprioceptive information that guides the muscle response for positioning the joint, and the ligaments themselves guide the motion of the articular components. It is important to note that ligaments themselves do not contract; rather, they guide the movement of a joint.
Execution
The technique has many variants. The general prescription is to disengage and exaggerate the diagnosed somatic dysfunction. This is the indirect component. The practitioner then waits for a change in the palpatory quality of the structure being treated, i.e., a change in skin tension, temperature, or muscle tension. This is followed by a balancing stage in which the practitioner slowly brings the joint into the diagnosed dysfunction (the direct component).