counterextension

But extension by men is also sufficient, and for the most part two strong men will suffice, by making extension and counterextension.

On Fractures 2007

The reduction, by extension and counterextension; the maintenance of the coaptation of the segments; the adaptation of the dressing by splints, oakum, and agglutinative mixtures; in fact, all the details of treatment may be here fulfilled with a degree of facility and precision not attainable in any other part of the organism.

Special Report on Diseases of the Horse Charles B. Michener 1877