Maximal Voluntary Muscle Force And Muscle Tone Of The Lower Extremities In Patients With Chronic Cerebrovascular Insufficiency And Deficit Of Physical Activity After A Course Of Modulated Electrical Myostimulation ("Russian Currents") Conference attendances
Language | Английский | ||||||
---|---|---|---|---|---|---|---|
Participant type | Устный | ||||||
Conference |
43rd Annual the International Society of Gravitational Physiology Meeting 26-31 May 2024 , Дубай |
||||||
Authors |
|
||||||
Affiliations |
|
Abstract:
INTRODUCTION The purpose of the work was to study the strength properties of the muscles of the lower extremities and muscle tone in patients with stroke and lack of motor activity before and after a course of modulated electrical myostimulation (EMS) in a hospital setting. METHODS The study was carried out in three groups of patients (average age 74.5±7.5 years). In the stimulation group (n=27), an EMS course was carried out with an average amplitude of 21.4±5.1 mA, consisting of an average of 7.9±2.4 sessions over 14 days. In the sham group (n=7), sham stimulation was performed at similar times with an average amplitude of 4.4±2.4 mA. In the control group (n=10), no EMS course was performed. Dynamometry was carried out in the supine position using a load cell mounted in a frame under the plate that took the loading from ankle extension. The measurement was taken from the leading leg with the angles of 90º at the hip, knee and ankle joints. The maximal voluntary force (MVF) in kg was determined - the patient performed three extensions in the ankle joint with the maximum possible force; during the analysis, the attempt with the maximal force was taken into account. Muscle tone of the lower extremities was assessed at rest using a MyotonPRO myotonometer (MyotonLTD, Estonia). The device applies five short mechanical impulses (15 ms) of a stable force (0.4 N) and records the response from the tissue under study, calculating the resistance of biological soft tissues to deformation force (Stiffness) (Schneider et al., 2015). The viscoelastic characteristics of the soleus, medial and lateral gastrocnemius, tibialis anterior, semitendinosus, biceps, rectus and vastus lateralis muscles were recorded as well as of the Achilles tendon. During this examination, the patient was in the prone or supine position. To standardize the position of the lower extremities, special support was placed under the knee and ankle joints in the prone or supine position, respectively. RESULTS After the EMS course, in the stimulation group there was a significant increase in MVF during ankle extension by 19.3% (p<0.05). In other groups, no significant changes were observed: in the control group, a slight increase in MVF was recorded by 7.1%, and in the sham group - a decrease by 8.24%. A study of muscle tone in the stimulation group before and after EMS showed significant changes in the Stiffness parameter in the soleus, tibialis anterior and rectus femoris muscles. In the soleus muscle, transverse stiffness significantly increased from 354.6±6.2 to 370.8±7.6 N/m (p<0.05). In the tibialis anterior muscle, stiffness significantly increased from 363.0±11.4 to 400.9±13.8 N/m (p<0.05). In the rectus femoris muscle, stiffness increased from 276.1±9.4 to 295.6±13.1 N/m (p<0.05). In the control group and the sham group, no significant changes in muscle tone were observed. The results of studies of maximum voluntary force and muscle tone of the lower extremities indicate that modulated electrical myostimulation can be considered as a promising method in the rehabilitation of patients with chronic cerebrovascular insufficiency and a lack of motor activity, leading to deterioration of postural stability and accompanied by the risk of falls. FUNDING The study was supported by the Ministry of Science and Higher Education of the Russian Federation under agreement № 075-15-2022-298 from 18 April 2022 about the grant in the form of subsidy from the federal budget to provide government support for the creation and development of a world-class research center, the “Pavlov Center for Integrative Physiology to Medicine, High-tech Healthcare and Stress Tolerance Technologies”. REFERENCES 1 Schneider S., Peipsi A., Stokes M., Knicker A., Abeln V. Feasibility of monitoring muscle health in microgravity environments using Myoton technology // Med Biol Eng Comput. 2015. Vol. 53. No 1. P. 57-66
Cite:
Abu Sheli N.M.A.
, Saveko A.A.
, Shigueva T.A.
, Kitov V.V.
, Avdeeva M.A.
, Rusakova K.V.
, Evseeva N.A.
, Gudkova A.A.
, Guekht A.B.
, Tomilovskaya E.S.
Maximal Voluntary Muscle Force And Muscle Tone Of The Lower Extremities In Patients With Chronic Cerebrovascular Insufficiency And Deficit Of Physical Activity After A Course Of Modulated Electrical Myostimulation ("Russian Currents")
43rd Annual the International Society of Gravitational Physiology Meeting 26-31 May 2024
Maximal Voluntary Muscle Force And Muscle Tone Of The Lower Extremities In Patients With Chronic Cerebrovascular Insufficiency And Deficit Of Physical Activity After A Course Of Modulated Electrical Myostimulation ("Russian Currents")
43rd Annual the International Society of Gravitational Physiology Meeting 26-31 May 2024