A.D. MILITSKOVA¹, G.G. YAFAROVA^1,2, L.M. BIKCHENTAEVA¹, I.A. LAVROV¹

¹Kazan (Volga) Federal University, 18 Kremlevskaya Str., Kazan, Russian Federation, 420008

²Republican Clinical Hospital of the Ministry of Health of the Republic of Tatarstan, 138 Orenburgskiy Trakt, Kazan, Russian Federation, 420064

 Militskova A.D. ― Junior Researcher of Scientific and Research Laboratory «Rehabilitation in Movement Disorders» OpenLab of the Institute of Fundamental Medicine and Biology, e-mail: [email protected], ORCID ID: 0000-0002-8078-8170

Yafarova G.G. ― PhD (biology), Leading Researcher of the Research Department, Senior Researcher of Scientific and Research Laboratory «Rehabilitation in Movement Disorders» OpenLab of the Institute of Fundamental Medicine and Biology, e-mail: [email protected], ORCID ID: 0000-0003-3068-3407

Bikchentaeva L.M. ― laboratory researcher of Scientific and Research Laboratory «Rehabilitation in Movement Disorders» OpenLab of the Institute of Fundamental Medicine and Biology, e-mail: [email protected], ORCID ID: 0000-0003-0647-4728

Lavrov I.A. ― PhD (medicine), Leading Researcher of Scientific and Research Laboratory «Rehabilitation in Movement Disorders» OpenLab of the Institute of Fundamental Medicine and Biology, e-mail: [email protected]

Parameters of evoked potentials m. soleus and m. tibialis anterior with transcutaneous electrical stimulation of the spinal cord at Th11-Th12 vertebra level in the control and in the performance of the Jendrassik maneuver were studied. The analysis of the amplitude characteristics of the middle response of the evoked potentials in the calf muscles in the case of stimulation of the spinal cord during the Jendrassic maneuver showed a significant increase of the response of the calf muscles with all delays of the «test stimulus». It was suggested that the most likely mechanism for alleviating spinal reflex reactions during the Jendrassik maneuver was a decrease in the threshold of excitation of α-motoneurons, mediated by changes in the background activity.

Key words: transcutaneous electrical stimulation, the Jendrassik maneuver, spinal cord.

(For citation: Militskova A.D., Yafarova G.G., Bikchentaeva L.M., Lavrov I.A. The modulating effect of the Jendrassik maneuver on muscle responses of the lower limbs caused by transcutaneous electrical stimulation of the spinal cord. Practical Medicine. 2018)

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