Discussion of the structure of the system of control of voluntary change in the angle of the joint. (Obsuzhdenie struktury sistemy upravleniia proizvol`nym izmeneniem ugla v sustave).

A structure of the system of control of voluntary change in the angle of the joint in the presence of an external resistance is proposed. In the model three control circuits are isolated. Circuit I controls the slow displacements and holding with low accuracy. Circuit II compensates the moment of external resistance. Circuit III controls the rapid displacement.