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Showing 3 results for Fatigue
Evaluation of motor control following thenar muscle fatigue using symmetrical index
Talebian S, Olyaei Gr, Abbaszadeh M, Partabian L,
Volume 67, Issue 5 (8-2009)
Abstract

Normal 0 false false false EN-US X-NONE AR-SA MicrosoftInternetExplorer4 Background: Muscle weakness and fatigue are two factors that cause muscle injuries. The roll of motor control is important in regulation and reduction of this effect. Repetition of motion after muscle fatigue is due to the significant role of motor control system. The aim of this study was to evaluate the quality of roll control of central nervous system following fatigue in order to answer primary questions in therapeutic exercises.
Methods: Twenty voluntary healthy subjects participated in this study. Dominant abductor policis brevis after surface electromyography (SEMG) of maximal voluntary contraction (MVC) fatigued by maximum three minutes isometric contraction in specific hand splint monitored by dynamometer until reduction of activities to 50% MVC. Before and immediately after fatigue test, 5 dynamic full range of motion in abduction direction performed without resistance and muscle activities recorded by SEMG. Three middle muscle activities selected for comparison of Symmetrical Index (SI) as specificity of motor control assessment. Fatigue indicators were percentage of reduction of MVC and median and mean frequency of power spectrum of MVC before and after fatigue test.
Results: Significant reduction of MVC (46.77%), median (13.03%) and mean (12.20%) frequency were showed (p=0.001), whereas significant increase of SI (10.76%) appeared (p=0.000), following fatigue test.
Conclusion: Fatigue reduces muscle contraction velocity, therefore median and mean frequency decrease. Also after muscle fatigue reduces of muscle proprioception sense appears, that can cause slow dynamic joint motion. Upper central control systems try to correct this situation by involving new motor units and changes of muscle timing. Synchronization of primary and new motor units plays an important role in increase of SI.


Clinical, psychological and demographic parameters of body pain in multiple sclerosis
Ghasem Salehpoor, Abdulaziz Aflakseir,
Volume 74, Issue 11 (2-2017)
Abstract

Background: Body pain in multiple sclerosis (MS) is a common phenomenon that can create or exacerbate by different parameters of clinical, psychological and demographic. The aim of this study was to investigate the relationship between parameters of clinical (fatigue, clinical course, body mass index and duration), psychological (depression, anxiety and stress) and demographic (age, gender, marital status and education) characters with multiple sclerosis patient’s body pain.

Methods: This cross-sectional study has been performed in the Multiple Sclerosis Society of Guilan Province and Imam Reza Specialized and Sub-specialized Clinic, Rasht City, Iran during June to February 2010. In this study 162 patients with MS were selected by consecutive sampling. We used the clinical and demographic variables inventory, body pain subscale of the health survey questionnaire, depression, anxiety and stress scale and fatigue severity scale along with identical analog-spring balance. The data were analyzed by Pearson correlation coefficient and point bi-serial, one-way analysis of variance, Gabriel test and stepwise multiple regression.

Results: The findings showed that patients who scored 3 or higher in relapses experienced significantly more body pain than patients who scored 1-2 times of relapses (P= 0.031). In the meantime, significant differences were not found between the two groups of patients with a score of 3 or higher in relapses and non-relapse and between non-relapse patients and with a score 1-2 times of relapses in terms of body pain. Also, significant differences were not found in different groups of hospitalization in terms of body pain. However, anxiety and fatigue together could explain significantly 25% of the shared variance of body pain (F= 26.29, P≤ 0.0009).

Conclusion: This study showed the effect of psychological and clinical factors on body pain exacerbation in MS patients. Therefore, it is necessary for clinicians to consider identifying these factors and the relationships of the factors with increasing pain in patients with MS.

The effectiveness of magnetic field therapy on fatigue in patients with multiple sclerosis-a randomized, single-blind clinical trial: a brief report
Arash Bostani, Hadi Gharabaghian Azar, Mehdi Jafari, Mastane Babaei Gramkhani,
Volume 80, Issue 1 (4-2022)
Abstract
Background: Multiple sclerosis (MS), as an inflammatory autoimmune disease and chronic degenerative central nervous system degeneration, often occurs in early adulthood. One of the common and debilitating symptoms of this disease is fatigue, which can affect up to 80% of patients with MS. This study aimed to evaluate the effectiveness of magnetic field therapy on fatigue in patients with MS.
Methods: Present study is a single-blind randomized clinical trial (RCT) that Was conducted on patients with multiple sclerosis from March 2019 to September 2021. In this study, 46 patients who met our inclusion criteria were divided into two groups randomly: magnetotherapy intervention and control group. The intervention was performed in the form of a pulsed magnetic field with a frequency of 15 Hz and an intensity of 4.5 Millie Tesla. In order to blind patients, they were unaware of the intervention or control group, and the technician in charge of the treatment and the statistician knew about it. Data were then collected and recorded using the Fatigue Severity Scale, the Patient Health Questionnaire, and the Epworth Sleepiness Scale Questionnaire.
Results: Of the 46 patients studied, 22 (48%) were male and the rest of them were female [24 cases (52%)]. The mean age of men and women was 34.4±7.3 and 33.5±1.7 years, respectively. Among the intervention and control groups, 8 people took amantadine equally in each group. In the magneto-therapy intervention group, the mean severity of fatigue reduced from 4.91±0.86 to 4.27±1.10, which was significant (p=0.024). In our control group, the mean intensity of fatigue reduced from 4.83±0.83 to 4.37±0.81, which was significant statistically (p=0.028). Although, the difference between the response of the two groups to treatment was not significant (p=0.382).
Conclusion: Due to the lack of significant differences in the reduction of fatigue severity, this treatment is not recommended for the treatment and management of fatigue in patients with MS.

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