[The surgical treatment of muscle tonus disorders by the destruction of the input areas of the posterior spinal nerve roots].

Stereotactic cryodestruction of the subcortical ganglions for microdestruction of the inlets of the radices spinales was conducted in resistant to drug and surgical treatment patients with impaired muscular tension and spastic pain syndrome (infantile cerebral paralysis, dystonia musculorum deformans, postencephalitic spastic-hyperkinetic syndrome). A total of 8 patients aged 19-46 were treated. The destruction of the segments depended on the site of the tension impairment. In cervical, upper extremity, lumbar, lower extremity involvement the segments to be destroyed were, respectively: SV--SVII, SVIII, LII--LIII, LIV, LV and SI. The surgery aimed at breaking the centripetal nociceptive and myotactic tracts. The treatment reduced muscular hypertonicity and hyperkinesis, relieved spastic pain. The paper presents anatomic and neurophysiological grounds for the procedure application.