جستجوی مقالات مرتبط با کلیدواژه « کنترل حرکت » در نشریات گروه « پزشکی »

The aim of this research was to compare the vertical, medial-lateral and anterior-posterior components of ground reaction force after anterior cruciate ligament reconstruction with the healthy individuals during walking.

This was an analytic cross sectional research. The participants of this research included 46 football and volleyball athletes, who were divided into two groups of individuals with anterior cruciate ligament reconstruction (ACLR) and healthy individuals. A force plate was employed to evaluate the components of the ground reaction force while walking.The data were statistically analysed using independent t test and SPSS version 16 software.

The results related to the vertical component of ground reaction force showed that the participants with anterior cruciate ligament reconstruction applied more force to the ground during heel strike and toe-off compared to healthy individuals, although the difference between the two groups was not significant (p=0.09 and p=0.35), but this difference was greater during heel strike. Likewise, the results related to the horizontal components of the ground reaction force showed that participants with anterior cruciate ligament reconstruction applied more force to the ground in all horizontal components of the ground reaction force, but the biggest difference between the two groups was in the first 20% of the stance phase and in the posterior (p<0.007) and lateral (p<0.02) directions. This difference between the two groups was significant.

The results of the research showed that the most important difference between the two groups occurred in the first 20% of the stance phase. Although among the 6 measured components, only the posterior (p < 0.007) and medial (p < 0.02) ground force components were significant.

Non-specific chronic low back pain (LBP) is the most common problem of spinal column disorder and musculoskeletal problems. Many evidence has demonstrated that exercise and corrective exercise is a positive intervention on decrease pain; but according to the relationship between increased lumbar lordosis angle and low back pain; it seems to be very important to implement the study about pain changes and lumbar lordosis angle. Furthermore, movement control impairment is one of the most problem related with low back pain. The aim of current systematic review was to evaluate the effect of exercise on pain, lumbar lordosis angle and movement control in participants with non-specific chronic low back pain.

A data base search within the all of times was performed, using Google Scholar, PubMed, The PEDro, CINAHL, Cochrane Library, Trip Database and Web of Science systems. Studies investigating the effect of types of exercise in pain, lumbar lordosis angle and movement control in patient with LBP were included. PEDro quality scale was used for the assessment of included studies.

Eleven out of 128 relevant articles had our search entrance criterions, which were chosen for this review (score higher than 5 on the PEDro scale). There was a large difference between various studies base on their methodology, outcome measures, simple size, procedure, etc. However, results from studies have verified that exercise causes decrease pain, decrease lumbar lordosis angle and increase movement control in patient with LBP; and exercise effective on decrease pain in pregnant women, but was not effect on lumbar lordosis angle in pregnant women. Also studies that shown decreased lumbar lordosis angle after exercises, was more effectively on more decreased LBP in patient.

It is likely that exercise decrease pain, lumbar lordosis angle and increase movement control in patient with low back pain; also exercise can decrease LBP in pregnant women, especially in the last months of pregnancy.

Alterations of neuroplasticity and cortical excitability are important pathophysiological factors in stroke. Modulation of the neuroplasticity has been proposed as an underlying mechanism of recovery in different neurological disorders. But it is not still clear how the CNS faces the complexity of muscle control. Neuroplastic processes may be used for the functional improvement of stroke, in particular for improving cortical functions. Neuromotor synergies is one of the most attractive hypotheses in motor control. Emerging evidence suggests that rehabilitation efforts that challenge to maximize the extent of neuroplastic changes can provide the greatest potential for rehabilitation success. A better understanding of the basic mechanisms of neuroplasticity will guide advances in neural repair and rehabilitation. Resolving the relationship of neural plasticity and individual field differences and may also have important clinical utility in developing appropriate neurorehabilitation outcomes and recovery. The objective of the present study was to review evidence of the effect of neuroplasticity on neuromotor synergies in healthy and stroke individuals on rehabilitation programs.

In the present systematic review study, we investigated the neuroplasticity interventions in stroke individuals. Articles published between January 2005 and January 2017 were reviewed. We searched for five keywords (neuroplasticity, motor learning, muscle synergy, rehabilitation, and stroke) using ProQuest, PubMed, Web of Science, and Google Scholar.

After initial screening and deleting irrelevant studies, 41 studies were chosen for the analysis. Studies were assessed and analyzed methodologically. Proper interventions were selected according to the least error criteria and outcome. Using a targeted selection approach. During the review process, eight articles were selected as the main articles for the review.

Considering the results of the current study, it seems that the neuroplasticity affects the domain of rehabilitation and muscle synergy in individuals with stroke and provides a desirable environment for plasticity-based intervention aimed at motor learning in this population. Large studies with long follow-ups are needed to explain the beneficial effects of neuroplasticity based training combined with rehabilitation protocols.

Belts and back supports are frequently used to prevent low back pain. Despite many studies, there are not sufficient evidence and conclusive consensus about the effects of these supports. The purpose of the present study was to determine the effect of lumbosacral supports on motor control pattern during combined trunk motion.

30 healthy young men were selected for the study. Temporal parameters of motor control and activity level of three pairs of trunk muscles were measured during combined trunk motion against minimum resistance and resistance equal to 50% of maximal isometric strength, under with and without back support conditions.

By application of a lumbosacral support, movement response time was significantly decreased under minimum resistance (P=0/004). Application of support decreased reaction time and motor time under two resistance conditions significantly (P<0/05). No significant changes were found in trunk muscle activity levels following wearing a back support (P>0/05).

By application of a lumbosacral support, individual reaction time was decreased. Although back support did not change the trunk muscle activity level, but the erector spinae muscle efficiency was increased to initiate desired movement.