The effects of support deprivation and stimulation of the foot support zones on the lateral stiffness and electromyogram of the resting calf muscles

Miller, T. F.; Саенко, И. В.; Popov, D. V.; Виноградова, О. Л.; Kozlovskaya, I. B.

doi:10.1134/s0362119712070146

Cited by 6 publications

(6 citation statements)

References 4 publications

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“…A decrease of transverse stiffness in m.soleus in this group reached significance only by the 6th day of DI; at the same time decrease of EMG amplitude at rest and maximal isokinetic force of m.triceps surae as well as signs of hyperreflexia and changes in MU recruitment order were not registered at all (Grigoriev et al, 2004; Khusnutdinova et al, 2004; Miller et al, 2004, 2005, 2010; Netreba et al, 2004, 2005, 2006; Kozlovskaya et al, 2007a,b; Shigueva et al, 2015a; Zakirova et al, 2015). Analogous effects of mechanical stimulation of the soles support zones were demonstrated in the structure of the muscular apparatus: no decrease of myofibrils’ sensitivity to free calcium ions, which is regularly observed under conditions of gravitational unloading; no changes in the cross sectional area of muscle fibers; and no decrease of the number of fibers containing slow isoforms of heavy myosin chains (Grigoriev et al, 2004; Moukhina et al, 2004; Shenkman et al, 2004a,b).…”

Section: Does Support Withdrawal Triggers Hypogravitational Motor Synmentioning

confidence: 90%

“…The decrease of transverse stiffness of single muscle fibers was also revealed in m.soleus after 7-day DI (Ogneva et al, 2011). Studies of transverse stiffness in the shin flexor (m.tibialis anterior) did not reveal significant changes under DI conditions (Gevlich et al, 1983; Kozlovskaya et al, 1988; Miller et al, 2010).…”

Section: Effects On the Neuromuscular Systemmentioning

confidence: 99%

“…This phenomenon was studied in detail in DI experiments on the ground, demonstrating the rapid decrease (up to 40–50%) of transverse stiffness in all three heads of the shin extensor — the lateral and medial m.gastrocnemius and most prominent – in m.soleus during the first 6 h of exposure (Gevlich et al, 1983; Kozlovskaya et al, 1988; Miller et al, 2004, 2005, 2010). The decrease of transverse stiffness of single muscle fibers was also revealed in m.soleus after 7-day DI (Ogneva et al, 2011).…”

Section: Effects On the Neuromuscular Systemmentioning

confidence: 99%

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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: Does Support Withdrawal Triggers Hypogravitational Motor Synmentioning

confidence: 90%

Section: Effects On the Neuromuscular Systemmentioning

confidence: 99%

Section: Effects On the Neuromuscular Systemmentioning

confidence: 99%

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

et al. 2019

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“…Interestingly, research performed by teams from the Institute of Biomedical Problems (IBMP) in Moscow (Russia) provided evidence of rapid muscle tone change termed hypogravitational muscle syndrome following gravitational unloading (Grigor'ev et al, 2004;Rukavishnikov et al, 2017). Reductions in tone and stiffness-have also been reported in several lower limb muscles e.g., m. triceps surae: m. gastrocnemius lateralis and medialis, and m. soleus (Nemirovskaya and Shenkman, 2002;Kozlovskaya, 2007;Miller et al, 2012). Such changes may be triggered by the absence of stimuli that in gravity activate postural muscle activity (Kozlovskaya, 2007;Shenkman et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

Dry immersion induced acute low back pain and its relationship with trunk myofascial viscoelastic changes

et al. 2022

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Microgravity induces spinal elongation and Low Back Pain (LBP) but the pathophysiology is unknown. Changes in paraspinal muscle viscoelastic properties may play a role. Dry Immersion (DI) is a ground-based microgravity analogue that induces changes in m. erector spinae superficial myofascial tissue tone within 2 h. This study sought to determine whether bilateral m. erector spinae tone, creep, and stiffness persist beyond 2 h; and if such changes correlate with DI-induced spinal elongation and/or LBP.Ten healthy males lay in the DI bath at the Institute of Biomedical Problems (Moscow, Russia) for 6 h. Bilateral lumbar (L1, L4) and thoracic (T11, T9) trunk myofascial tone, stiffness and creep (MyotonPRO), and subjective LBP (0-10 NRS) were recorded before DI, after 1h, 6 h of DI, and 30min post. The non-standing spinal length was evaluated on the bath lifting platform using a bespoke stadiometer before and following DI.DI significantly modulated m. erector spinae viscoelastic properties at L4, L1, T11, and T9 with no effect of laterality. Bilateral tissue tone was significantly reduced after 1 and 6 h DI at L4, L1, T11, and T9 to a similar extent. Stiffness was also reduced by DI at 1 h but partially recovered at 6 h for L4, L1, and T11. Creep was increased by DI at 1 h, with partial recovery at 6 h, although only T11 was significant. All properties returned to baseline 30 min following DI. Significant spinal elongation (1.17 ± 0.20 cm) with mild (at 1 h) to moderate (at 6 h) LBP was induced, mainly in the upper lumbar and lower thoracic regions. Spinal length increases positively correlated (Rho = 0.847, p = 0.024) with middle thoracic (T9) tone reduction, but with no other stiffness or creep changes. Spinal length positively correlated (Rho = 0.557, p = 0.039) with Max LBP; LBP failed to correlate with any m. erector spinae measured parameters.The DI-induced bilateral m. erector spinae tone, creep, and stiffness changes persist beyond 2 h. Evidence of spinal elongation and LBP allows suggesting that the trunk myofascial tissue changes could play a role in LBP pathogenesis observed in real and simulated microgravity. Further study is warranted with longer duration DI, assessment of IVD geometry, and vertebral column stability.

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“…Despite many experiments carried out in real ( Gevlich et al, 1983 ; Kozlovskaya et al, 1990 ; LeBlanc et al, 2000 ; Trappe et al, 2009 ) and simulated weightlessness ( Miller et al, 2012 ), changes in muscle tone induced by hypogravity conditions remain insufficiently investigated. A small number of subjects, different methods of assessment, and the lack of a standard protocol make it difficult to determine quantitative changes in the tone.…”

Section: Introductionmentioning

confidence: 99%

Sharp Changes in Muscle Tone in Humans Under Simulated Microgravity

et al. 2021

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A decrease in muscle tone induced by space flight requires a standardized assessment of changes to control the state of the neuromuscular system. This study is a step toward the development of a unified protocol, aimed at determining the initial effect of the presence or withdrawal of support on muscle tone, the effects of a 2-h supportlessness in Dry Immersion (DI) experiments, and the changes in muscle tone depending on the site of measurement. To perform measurements of changes in muscle tone, we used a MyotonPRO device. The list of muscles that we assessed includes: trunk – mm. deltoideus posterior, trapezius, erector spinae; leg – mm. biceps femoris, rectus femoris, tibialis anterior, soleus, gastrocnemius; foot – m. flexor digitorum brevis, tendo Achillis, aponeurosis plantaris. The study involved 12 healthy volunteers (6 men, 6 women) without musculoskeletal disorders and aged 32.8 ± 1.6 years. At the start of DI, there was a significant decrease in muscle tone of the following muscles: mm. tibialis anterior (−10.9%), soleus (−9.6%), erector spinae (−14.4%), and the tendo Achillis (−15.3%). The decrease continued to intensify over the next 2 h. In contrast, the gastrocnemius muscle demonstrated an increase in muscle tone (+7.5%) 2 h after the start of DI compared to the immediate in-bath baseline. Muscle tone values were found to be site-dependent and varied in different projections of mm. erector spinae and soleus. In previous experiments, we observed a high sensitivity of the myotonometry technique, which was confirmed in this study. To make it possible to compare data from different studies, a standardized protocol for measuring muscle tone for general use in gravitational physiology needs to be developed.

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The effects of support deprivation and stimulation of the foot support zones on the lateral stiffness and electromyogram of the resting calf muscles

Cited by 6 publications

References 4 publications

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

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

Dry immersion induced acute low back pain and its relationship with trunk myofascial viscoelastic changes

Sharp Changes in Muscle Tone in Humans Under Simulated Microgravity

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