We have analyzed the results of diagnostics and treatment of 36 patients with neuromuscular dysfunctional syndrome of TMJ. We have found that the cause of pathology is acute damage, stress, parafunction of masseteric muscules, durable influence on the joint. NDS is characterized by the impairment of masseteric muscularfunction, that results in motional restriction in all directions. Treatment must include elimination of etiological factors, symptoms of the disease, normalization of masseteric muscle function and prophylaxis of complications.