The effect of immersion hypokinesia on the kinematic and electromyographic parameters of human locomotion

Шпаков, А. В.; Artamonov, A. A.; Voronov, A. V.; Melnik, K.A.

doi:10.1134/s0362119710070145

Cited by 6 publications

(7 citation statements)

References 3 publications

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“…First, the accuracy of movement control decreases (Repin, 1981; Kreidich et al, 1982; Grigorieva and Kozlovskaya, 1985; Kirenskaya et al, 1985; Sosnina et al, 2016). It has also been shown that the cortical organization of voluntary movements is changed (Kirenskaya et al, 2006; Tomilovskaya et al, 2008), and that the systems of posture and locomotion control suffer greatly (Melnik et al, 2006; Shpakov et al, 2008; Sayenko et al, 2016; Amirova et al, 2017). Similarly, studies of resting state brain activity revealed the changes similar to those obtained in a real space flight, indicating that support withdrawal is the main contributor to brain activity alterations and decline in the function of corticospinal tract function in weightlessness (Kuznetsova et al, 2015; Lazarev et al, 2018).…”

Section: Effects On the Sensory-motor Systemmentioning

confidence: 99%

Dry Immersion as a Ground-Based Model of Microgravity Physiological Effects

et al. 2019

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Dry immersion (DI) is one of the most widely used ground models of microgravity. DI accurately and rapidly reproduces most of physiological effects of short-term space flights. The model simulates such factors of space flight as lack of support, mechanical and axial unloading as well as physical inactivity. The current manuscript gathers the results of physiological studies performed from the time of the model’s development. This review describes the changes induced by DI of different duration (from few hours to 56 days) in the neuromuscular, sensory-motor, cardiorespiratory, digestive and excretory, and immune systems, as well as in the metabolism and hemodynamics. DI reproduces practically the full spectrum of changes in the body systems during the exposure to microgravity. The numerous publications from Russian researchers, which until present were mostly inaccessible for scientists from other countries are summarized in this work. These data demonstrated and validated DI as a ground-based model for simulation of physiological effects of weightlessness. The magnitude and rate of physiological changes during DI makes this method advantageous as compared with other ground-based microgravity models. The actual and potential uses of the model are discussed in the context of fundamental studies and applications for Earth medicine.

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Section: Effects On the Sensory-motor Systemmentioning

confidence: 99%

Dry Immersion as a Ground-Based Model of Microgravity Physiological Effects

et al. 2019

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“…A similar decrease in the precision of movements and increase in their "electomyographic cost" are observed in astronauts after long term spaceflights [41]. A sub stantial increase in the electomyographic cost of non precision movements (locomotions) has been observed in healthy subjects after a six day immersion [42]. We also note that a local hypodynamic syn drome, related, e.g., to an injury of an extremity (a tib ial and/or fibular shaft fracture) substantially decreases the speed-force characteristics (the maxi mum force momentum and peak rates of effort devel opment and relaxation) of the contractile activity of dorsal foot flexors caused by rhythmic stimulation of a motor nerve [43].…”

Section: Discussionmentioning

confidence: 62%

Voluntary control of muscle tension in lengthened and intact limbs in different ranges of force load

Шеин

Криворучко

2012

Hum Physiol

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The effect of the force load on the coordination structure of human spatial movements has been dem onstrated by a series of studies on the ergonomic pro file. For example, Semenov [1] and Chekirda [2] observed an improvement of sensorimotor perfor mance in subjects with a moderately loaded arm. Farfel' [3] and Komarov [4] assumed that large force loads (more than 50% of the maximum muscle force) decreased the movement precision. Lyubomirskii [5] demonstrated a dependence of the strength and preci sion of hits with a hammer on the weight of the ham mer head in 11 to 14 year old schoolchildren (the precision was the lowest for the lightest and the heavi est hammers). These data indicate that a moderate load improves the coordination of movements per formed under the conditions of auxotonic muscle contractions. Lyubomirskii [5] assumes that these relationships are also true for precision movements performed in modes close to isometric. The effect of the changes in the structural and functional character istics of muscles on the coordination structure of pre cision movements in a different range of force loads also remains an open question.The objectives of this study were to estimate the asymmetries of the integrated parameters of visuomo tor tracking with the use of isometric control organs in patients in different periods after surgical elimination of a difference between the lengths of the lower extremities and to test the hypothesis that there is a range of isometric loads where subjects organize vol untary control of muscle tension with the maximum precision and minimum specific energy expenditure. METHODSTwenty three patients aged 15-35 years (6 men and 17 women) with shortening of a leg of different eti ologies were subjected to integrated examination using dynamometric, visuomotor tracking, kinesthesiomet ric, and global and local electromyographic methods. The sample was distributed with respect to the etiology of the shortening of the extremity as follows: conse quences of tuberculosis of bones and joints, 11; osteo myelitis, 3; congenital malformations, 9. The Ilizarov distraction apparatus was used to lengthen the lower leg by 4-17 (8.6 ± 0.7) cm, which corresponded to 13-68 (28.7 ± 3.2)% of the initial length of the seg ment. The mean rate of distraction varied from 0.8 to 2.2 (1.2 ± 0.1) mm/day; the durations of distraction and fixation were 44-178 (76 ± 8) and 53-237 (101 ± 10) days, respectively. After removal of the Ilizarov apparatus, immobilization with a plaster dressing was used in 17 cases; the duration of immobilization was 15-117 (50 ± 5) days. Eight subjects were examined once; 15 subjects, twice; 20 examinations were per formed within 296 to 430 (330 ± 29) days and 18 exam inations, within 616 to 870 (747 ± 59) days after the removal of the Ilizarov apparatus or the plaster dress Abstract-Data confirming the hypothesis that there is a range of isometric loads where subjects organize voluntary control of muscle tension with the maximum precision and minimum specific energy expenditure are p...

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“…Пошук чинників, які прискорюють відновлення функції скелетних м'язів після тривалої гіпокінезії, дозволив виявити позитивний вплив дозованого фізичного навантаження на їх фізіологічну регенерацію (Schiaffino et al, 2013). Враховуючи його потужний стимулювальний вплив на різноманітні органи та тканини людського організму (Shpakov et al, 2010), ми поставили за мету дослідження виявити особливості структурної перебудови м'язових волокон за гіпокінезії та дозованого фізичного навантаження у постгіпокінетичному відновному періоді.…”

Section: прикарпатський національний університет імені василя стефаниunclassified

“…Вивчення скелетних м'язів при багатьох фізіологічних і патологічних процесах підтвердило думку окремих дослідників (Shpakov et al, 2010;Suetta and Kjaer, 2010;Sumi, 2014) про досить високу чутливість їх складових до умов тривалої гіпокінезії. Виявлені зміни м'язових волокон уже через 90 діб після початку моделювання тривалої гіпокінезії свідчать про їх неспецифічність, оскільки вони часто зустрічаються за деяких міопатій (Rayavarapu et al, 2013;Sakuma, 2014), а також як реакція адаптації м'язів до метаболізму в умовах порушення мікроциркуляції крові (Schiaffino et al, 2013).…”

Section: обговоренняunclassified

Structural changes in skeletal muscles in hypokinesia and physical loading in the posthypokinetic period of recovery of rats’ organisms

Pоpеl

2017

Regul. Mech. Biosyst.

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This article reports the study of histo-ultrastructural changes of different structural components of the direct muscle of the thigh of sexually mature male rats over a prolonged period of hypokinesia and subsequent application of physical loading of average aerobic power. Using a light optical, electron microscope (for the exposure of structural transformations of muscle components) and histochemical (for determination of activity of succinate dehydrogenase according to the Nahlas method to identify muscle fibers with different phenotypes) methods, we studied the structural manifestations of adaptation of muscle fibres under prolonged (240 day) hypokinesia and 15–30 episodes of physical loading of average aerobic power in the posthypokinetic period among 55 sexually mature rats. Under prolonged hypokinesis we primarily observed changes in the intramuscular network and morphometric changes in the blood vessels. These data closely correlate with the progression of changes of the subcellular components responsible for energetic and flexible balance of muscle fibres. We found that fast oxygen-glycolytic muscle fibers and their peripheral nervous apparatus are the most sensitive to prolonged hypokinesia. As a result of application of physical loading of average aerobic power, reparative regeneration is intensified, which substantially shortens the period of recovery of structural-functional properties of skeletal muscles in the conditions of hypokinetic disorders. Thus, in prolonged hypokinesia, changes primarily affect the sources of blood supply to skeletal muscles, with the secondary development of reverse processes in muscle fibers and peripheral nervous apparatus with certain morphometric signs.

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The effect of immersion hypokinesia on the kinematic and electromyographic parameters of human locomotion

Cited by 6 publications

References 3 publications

Dry Immersion as a Ground-Based Model of Microgravity Physiological Effects

Dry Immersion as a Ground-Based Model of Microgravity Physiological Effects

Voluntary control of muscle tension in lengthened and intact limbs in different ranges of force load

Structural changes in skeletal muscles in hypokinesia and physical loading in the posthypokinetic period of recovery of rats’ organisms

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