[Relationship between decreased presynaptic inhibition and muscle spasticity in patients with a history of cerebral insult]. / Zavisimost' mezhdu oslableniem presinapticheskogo tormozheniia i myshechnoi spastichnost'iu u bol'nykh, perenesshikh mozgovoi insul't.

Stimulation electromyography was used to study inhibition of the soleus muscle H-reflex induced by stimulation of the common peroneal nerve in healthy individuals and in patients who had underwent cerebral apoplexy. Two successive inhibition waves (D1 and D2) were recorded; the first wave demonstrated the development of presynaptic inhibition of group Ia afferent fibers. In post-insult patients the depth of inhibition diminished depending on the degree of the pathologic increase of the tonus of the skeletal musculature. The role of presynaptic inhibition disorders in the pathogenesis of muscle spasticity is discussed.

[Homosynaptic depression of the monosynaptic spinal reflex in healthy people and patients, suffering from a cerebral stroke]. / Gomosinapticheskaia depressiia monosinapticheskogo spinal'nogo refleksa u zdorovykh liudei i bol'nykh, perenesshikh mozgovoi insul't.

Homosynaptic depression of H-reflex was studied in 25 healthy persons and 33 patients with hemiplegia. The mean duration of the homosynaptic depression in healthy persons was 5200 ms. After the initial relative facilitation the time course of the homosynaptic depression corresponded to a logarithmic function of the interval between the conditioning and testing stimuli. The homosynaptic depression in patients with hemiplegia decreased depending on the degree of the muscular spasticity.