Features of electromyographic changes in patients with upper limb lesions during various exercise types performance

Abstract

For the first time in clinical conditions a study was carried out for estimation of average amplitude (AA-EMG) and frequency of oscillations repetitions parameters during dynamic and static exercises performance. We found that in healthy individuals EMG amplitude depends on the character of physical exercises performed. The largest EMG amplitude was registered when performing static exercises. It was found that in acute stroke patients, while performing flexion and extension of fingers, low-amplitude EMG activity was registered stretched for entire movement cycle without a clear peak of extremum. When performing static exercises, the amplitude and frequency of EMG oscillations changed significantly in a positive way.

Analgesic effects of high-frequency and low-frequency TENS currents in patients with distal neuropathy

“…New scientific evidence has been obtained that the resolution of pain syndrome in patients with type II DM with DPNP in the lower extremities primarily depends on the modality of the applied pulse current TENS, including those based on electroneuromyography (ENMG) indicators. 28 Thus, positive sensory pain symptoms increased by 23.9% (р <0.05). Negative sensory pain symptoms, primarily in the lower extremities, are more actively stopped by low-frequency parameters (1-3 Hz, sending a pause – 100 ms) TENS.…”

“…A total of 15 procedures were performed daily or every other day. Tools for assessing neuropathic pain: the VAS system, where pain intensity was assessed using a 10-point visual scale, 28 including the area of its projection on skin tissues on the MPQ scale (MPQs) according to McGill, 28 evaluation of spatial modeling of pain syndrome with analysis of localization, pain projection in the form of graphical analysis, 28 which made it possible to visualize the pain syndrome according to the system (PPA) defined by a special two-dimensional transparent grid (Douleur Neuropathique.4 Questions- DN4). 28 The complexity of the structural assessment of pain syndrome allowed to improve the system of differentiation of neuropathic pain in DPNP in patients with type II diabetes.…”

“… 25 TENS of peripheral nerves in patients with type II DM suffering with DPNP was first time applied in Russia in 2015, 2 , 22 which allowed us to obtain new data and new scientific concept of the mechanisms of action of TENS: i) regional improvement of blood circulation in the nerve and the surrounding tissues; 23 ii) an increase in axonal transport, leading to accumulation of growth factor in peripheral nerves; 24 iii) formation of anastomoses between the intact and damaged nerve fibers; 25 iv) reinnervation of muscle fibers; 26 v) regeneration of nerve fibers; 27 and vi) inhibition of pro-inflammatory cytokines. 28 …”

“…25 TENS of peripheral nerves in patients with type II DM suffering with DPNP was first time applied in Russia in 2015, 2,22 which allowed us to obtain new data and new scientific concept of the mechanisms of action of TENS: i) regional improvement of blood circulation in the nerve and the surrounding tissues; 23 ii) an increase in axonal transport, leading to accumulation of growth factor in peripheral nerves; 24 iii) formation of anastomoses between the intact and damaged nerve fibers; 25 iv) reinnervation of muscle fibers; 26 v) regeneration of nerve fibers; 27 and vi) inhibition of proinflammatory cytokines. 28 It should be noted that currently conducted clinical and experimental studies, including TENS, give a very contradictory assessment and interpretation of the results of immediate and long-term observation, both in relation to pulse modulations of high-frequency (HF TENS) and low-frequency (LF TENS) current of different shapes, as well as in terms of amplitude and frequency parameters (100-200 Hz) and (1)(2)(3). The aim of this study was to conduct a multi-faceted assessment of pain syndrome in patients with type II DM suffering with DPNP before and after use of pulsed modulated current of different frequency and amplitude in the form of TENS, adding scientific data on the mechanism of action and developing optimizing analgesic techniques taking into account the levels and severity of polyneuropathy and age of patients based on analytical structural details of this pain syndrome.…”