فهرست مطالب

Rehabilitation Sciences and Research - Volume:1 Issue:1, 2014
  • Volume:1 Issue:1, 2014
  • تاریخ انتشار: 1393/10/01
  • تعداد عناوین: 5
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  • Behdad Tahayori *, Arnold G. Nelson, David M. Koceja Page 2
    Background
    It has been shown that a bout of jumping exercise with weighted vests increases the subsequent countermovement jump height. However, it is not clear whether the improvement in jump height is due to the enhancement of joint power or due to other mechanisms such as neural adaptations.
    Methods
    To investigate this dichotomy, we tested the acute neuromechanical changes following a preloaded exercise protocol (3 sets of 5 consecutive CMJs with a weighed vest equal to 15% of the body mass of the participant) that successfully increased the subsequent jump height. On average, jump height increased 1.52 cm (5.40%) after this exercise as compared to CMJs prior to the exercise protocol.
    Results
    A significant decrease in the time from the start of the movement to take off (pre-take off duration) was observed. This decrease was exclusively caused by exercising with a weighted vest, since such a change was not observed in the control sessions in which participants exercised without the weighted vest. Our data showed that jumpers leave the ground with some degrees of knee flexion and upon exercising with weighted vest this amount of flexion increased and hence an increase in the jump height. However, no significant changes in peak values of lower limb joint angle, velocity, moment and power were observed.
    Conclusion
    It is suggested that for designing weighted vest exercise protocols with the aim of increasing jump height, the idea of modifying the timing of the movement should be considered as a cause of the enhancement. This novel idea adds another mechanism for increasing the jump height following weighted vest exercise, along with the general belief of muscle potentiation.
    Keywords: Take off, Specific Warm up Protocol, Joint Power, Preparation Phase, Propulsion Phase, Pre, Take off Duration
  • Nasrin Salehi Dehno, Shohreh Noorizadeh Dehkordi *, Mehdi Dadgoo, Masoud Salehi Page 8
    Background
    The complications associated with spastic cerebral palsy can affect the physical ability and quality of life of individuals suffering from this motor disorder. The aim of this study was to assess the relationship between quality of life and hypertonia in adults with spastic cerebral palsy.
    Methods
    In an analytical cross sectional study, 70 subjects with the diagnosis of spastic cerebral palsy from three Ra’ad Rehabilitation Goodwill complexes in Tehran and Karaj cities took part in this study through convenient sampling. The severity of spasticity and contracture of the knee flexors were measured by Modified Tardieu Scale. Also the quality of life was assessed through World Health Organization quality of life-BREF questionnaire. To analyze data, Pearson and spearman correlation coefficient were used.
    Results
    Participants of this study were 42.90% male, 57.10% female with mean age 26.24±5 years. No correlation existed between quality of life with knee flexor muscles spasticity. However, psychological and environmental domains showed low correlations with knee extension range (respectively r=0.26 and r=0.28; P<0.05).
    Conclusion
    The influences of the mechanical component of hypertonia (contracture) on the quality of life are more prominent than neural factors such as spasticity.
    Keywords: Adult, Cerebral Palsy, Quality of Life, Hypertonia
  • Mohammad Hassan Azarsa, Azadeh Shadmehr*, Shohreh Jalaei Page 12
    Background
    Scapular stabilization and neuromuscular control provide an important parameter to characterize shoulder function during dynamic activities. Many studies have confirmed the effect of the loading on scapular position and scapulohumeral rhythm. Therefore, the evaluation of stabilizer muscles involvement in scapular asymmetry may assist in the development of clinical examination and rehabilitation program. The aim of this study was to evaluate the effect of loading on dynamic stability and scapular asymmetry in basketball players.
    Methods
    Thirty healthy male basketball players aged between 20 to 31 years old were tested. The linear distance between scapular inferior angle and T7 spinous process was measured using a caliper in 90 degrees of unloaded scaption and with 1, 2 and 4 kg loading. The difference of distances of two sides in the above 4 positions was analyzed.
    Results
    The amount of distances difference in two sides with 1 kg loading was minimal (9.36 mm). This difference increased to 10.19 mm and 12.22 mm, with increasing the loading to 2 and 4 kg respectively; although the 4 positions of the test did not show significant differences in distances difference (P>0.05).
    Conclusion
    This study shows that dynamic stability of the scapula is dependent on the role of muscles, so that with increasing load on the muscles, the scapular asymmetry is more pronounced.
    Keywords: Loading, Scapular Asymmetry, Stabilizer Muscles, Dynamic Stability
  • Fahimeh Kamali*, Giti Torkaman Page 17
    Background
    Examination of cartilage repair in animal work is dependent upon the thickness and radius of the induced impalement. Full-thickness defects with a radius of 3 mm have been commonly used in animal studies to evaluate new procedures designed to improve the quality of articular cartilage repair. The aim of the present study was to define the biomechanical characteristics of the repair of 5×4 mm full-thickness osteochondral defects in adult male rabbits.
    Methods
    In a controlled clinical trial study 5 mm diameter and 4 mm deep osteochondral defects were drilled in the femoral patellar groove of twenty-one rabbits, and examined at 4, 8, and 16 weeks. The left knee was kept intact and was regarded as control. The knee joints were removed, and both legs were examined biomechanically by in situ indentation method at three time intervals (4, 8, 16 weeks). The instantaneous and equilibrium elastic- modulus (after 900 second) were measured during the test.
    Results
    There were no differences in cartilage mechanical properties (instantaneous and equilibrium elastic-modulus) in different weeks (4, 8, 16 weeks) in the two groups (P=0.08). However, significant differences were seen between the experimental and control groups in 16 weeks in instantaneous elastic_ modulus (P=0.44). It suggests that new tissue in this group had more stiffness than control in 16 weeks.
    Conclusion
    Full-thickness osteochondral defect, measuring 5×4mm in the patellar groove of the adolescent rabbit knee healed spontaneously.
    Keywords: Articular Cartilage, Biomechanical Evaluation, Elastic Modulus, Repair, Indentation
  • Faranak Behzadi, Hesammedin Noroozi, Marzieh Mohamadi* Page 21
    Background
    Traditional Bobath approach (TBA) is one of the several methods which is used for the treatment of children with cerebral palsy (CP) who are referred to occupational therapy settings. In this study the effect of TBA on the gross motor function (GMF) of children with CP was compared with that of the Home Program Bobath approach (HPBA).
    Methods
    Thirty children with CP participated in this study. They were randomly assigned in two groups. Control group received Bobath traditional services for 12 sessions. In the intervention group, along with these services, parents participated in training program and followed the exercises. Scale was used to assess GMF before and after intervention.
    Results
    Participants of this study consisted of 9 girls and 6 boys in traditional group and 10 girls and 5 boys in home-based group. The mean age of home-based group was 19.53±3.35 months and traditional group was 17.20±6.80. GMF increased significantly in both groups. In addition, differences between the two groups were significant (P=0.007).
    Conclusion
    the results of this study showed that TBA with HPBA was more effective than the traditional ones.
    Keywords: Occupational Therapy, Home Programs, Cerebral Palsy