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The study aimed to evaluate the effectiveness of functional and motor activity restoration, including the walking function, in patients after an ischemic stroke using the ExoAtlet lower limb exoskeleton. Patients and methods. A clinical study was carried out on 42 patients who had undergone a cerebral infarction in the mid cerebral artery system with a post-stroke paresis of the leg, and who had undergone a rehabilitation course in a round-theclock hospital during the early recovery period. Patients were randomized into two equal groups comparable in terms of the stroke severity: the patients in group 1 were receiving a standard rehabilitation program (control group), the patients in group 2 were additionally receiving a course of gait rehabilitation using the ExoAtlet exoskeleton - 10 sessions, 5 sessions per week for 14 days. Results. The study demonstrated the effectiveness of the ExoAtlet exoskeleton used in the rehabilitation of stroke patients over the standard course of rehabilitation. The advantages include a decrease in the hemiparesis degree, an increase in the muscle strength of the paretic limb, an improvement in balance, an improvement and acceleration of the walking process. The obtained results of the instrumental study confirmed the benefits of physical training on the Exoskeleton, which was demonstrated through an increase in stability and balance, as well as through a decrease in the energy consumption index for maintaining the stable verticalization. Conclusion. The usage of the ExoAtlet exoskeleton increases the effectiveness of rehabilitation measures and improves motor and functional activities of patients who have suffered a cerebral stroke.

The studies were conducted in the arid zone of Stavropol region to determine the productivity of winter wheat cultivated by direct seeding technology, based on phenological observations and NDVI. The work was carried out on the basis of the agro-enterprise JSC "Agrohleboprodukt" for 2018-2020. The predecessors are sunflower, chickpeas, winter wheat varieties (Zustrich (St.), Bagheera and Bagrat). Plant samples were selected according to the generally accepted method. Satellite mapping data of vegetation cover is obtained on the basis of the service "VEGA-Science". It was found that the growth, development and productivity of winter wheat depended on the prevailing weather and climatic conditions. Studies of the dynamics of the average annual indicators showed that precipitation tended to decrease (37.6-14.4 mm), and the temperature and vegetation index NDVI-to increase (9.6-12.3 °C and 0.456-0.491, respectively). The analysis showed the absence of a reliable level of significance of the combined application of these factors for predicting the productivity of winter wheat. The terms of sowing the crop were determined by external conditions and shifted to a later period. The largest average linear deviation of the indicator was revealed in 2020 (6.4444). On average, the variation of seedlings for different varieties and predecessors was 9 % (the lowest for chickpeas – 7.5 %). Seedlings of grain crops appeared 19-20 days after sowing. The coefficient of variation showed a high heterogeneity of the phenological index for all phases, except for tillering (8.6-9.0 %). The average density of plant seedlings was 379 pcs./m2. The coefficient of variation of the indicator is uniform for all varieties and precursors (3.65 %). A decrease in plant density was observed from the germination phase to earing and for all the predecessors (the largest for the Zustrich variety – 7.3 % and 10.2 % for sunflower and chickpeas, respectively). From 2018 to 2020, the yield of winter wheat when sowing for sunflower was 301-450 t/ha, for chickpeas – 326-468 t/ha.

Good tolerability of workload within 30-40 min. was observed. The improvement in the EDSS was detected in 9 patients, in whole, a significant positive trend (p<0.01) was shown. The study of the biomechanics of the walk showed its significant impairment compared to healthy individuals: reduction of parameters of rate, speed and step length, significant instability, pronounced asymmetry, the decrease in support and shock lower limb function, high coefficient of variability of the parameters, the phenomenon of recurrence of the vertical component of support reactions. After a course of exercise of walking in the exoskeleton, the walking speed and stability increased, oscillation of the body decreased, support function increased, the phenomenon of cyclical changes of the vertical component of support reactions reduced. The results of the pilot study showed promising future research opportunities for robotic-assisted walking and maintenance of the vertical posture with the help of the exoskeleton ExoAtlet to restore the abilities of movement in MS patients with locomotor disorders.