The effects of a three-week use of lumbosacral orthoses on trunk muscle activity and on the muscular response to trunk perturbations

<p>Abstract</p> <p>Background</p> <p>The effects of lumbosacral orthoses (LSOs) on neuromuscular control of the trunk are not known. There is a concern that wearing LSOs for a long period may adversely alter muscle control, making individuals more susceptible to injury if they discontinue wearing the LSOs. The purpose of this study was to document neuromuscular changes in healthy subjects during a 3-week period while they regularly wore a LSO.</p> <p>Methods</p> <p>Fourteen subjects wore LSOs 3 hrs a day for 3 weeks. Trunk muscle activity prior to and following a quick force release (trunk perturbation) was measured with EMG in 3 sessions on days 0, 7, and 21. A longitudinal, repeated-measures, factorial design was used. Muscle reflex response to trunk perturbations, spine compression force, as well as effective trunk stiffness and damping were dependent variables. The LSO, direction of perturbation, and testing session were the independent variables.</p> <p>Results</p> <p>The LSO significantly (<it>P </it>< 0.001) increased the effective trunk stiffness by 160 Nm/rad (27%) across all directions and testing sessions. The number of antagonist muscles that responded with an onset activity was significantly reduced after 7 days of wearing the LSO, but this difference disappeared on day 21 and is likely not clinically relevant. The average number of agonist muscles switching off following the quick force release was significantly greater with the LSO, compared to without the LSO (<it>P </it>= 0.003).</p> <p>Conclusions</p> <p>The LSO increased trunk stiffness and resulted in a greater number of agonist muscles shutting-off in response to a quick force release. However, these effects did not result in detrimental changes to the neuromuscular function of trunk muscles after 3 weeks of wearing a LSO 3 hours a day by healthy subjects.</p

Recovery of rotators strength after latarjet surgery.

The purposes of this study were to prospectively determine changes in rotator cuff strength before and after surgical shoulder stabilization by Bristow-Latarjet procedure and to better estimate time needed for rotator cuff strength recovery. 20 patients with recurrent anterior posttraumatic shoulder dislocation underwent internal (IR) and external (ER) rotator isokinetic evaluation before and 3, 6 and 21 months after Bristow-Latarjet surgery. In a seated position with 45° of shoulder abduction in the scapular plane, both shoulders were evaluated concentrically with a Con-Trex® isokinetic dynamometer at 180°∙s - 1, 120°∙s - 1 and 60°∙s - 1. 3 months post-surgery, IR and ER strength of the operated shoulder were significantly lower than before surgery ( - 28±20% for IR, - 17±17% for ER) (P&lt;0.05). At 6 and 21 months post-surgery, IR and ER strength were comparable to strength before surgery; strength recovery is seen at 6 months post-surgery with long-term maintenance at 21 months. Given the weakness 3 months post-surgery, return to sports (including overhead and contact sports) should be discussed, and 6 months post-surgery may be a better point for an athlete to resume practicing sports. Isokinetic rotator cuff strength evaluation appears to be relevant in helping to determine the need of continuing strength rehabilitation. Pre-surgical evaluation contributes to the relevance of later comparisons

The faisability and the effects of cycloergometer interval-training on aerobic capacity and walking performance after stroke. Preliminary study

International audienc

The faisability and the effects of cycloergometer interval-training on aerobic capacity and walking performance after stroke. Preliminary study

International audienc

[Is very old age a prognostic factor for outcome after a first stroke?]

International audienceAIM: To determine whether very old age, older than 80 years, after a stroke is a significant predictor of mortality, orientation to a specific care pathway after the acute phase and functional status at 6 months after the stroke. PATIENTS: A sample of 112 consecutive patients admitted to the emergency department because of a first stroke, with hemiplegia and/or aphasia over 6 months, who satisfied strict inclusion/exclusion criteria. Forty-seven patients were older than 80. METHOD: After initial diagnosis and enrolment in the study, follow-up assessments were conducted at 48 hours, 15 days and 6 months. Demographic, medical, and radiographic data were collected, and patients were evaluated on the NIHSS, MMSE, Barthel Index, FIM(TM) and FAM scales. Descriptive statistics were generated, as were uni- and multivariate between group comparisons. RESULTS: Our study shows that after a first stroke, old age is significantly associated with a high rate of death, a low rate of orientation to a physical medicine and rehabilitation unit and return to home but not poorer functional outcome. CONCLUSION: Old age is therefore a determinant of post stroke management. Further studies are needed to evaluate whether in patient rehabilitation would result in significant functional benefit, considering the high cost of care, high risk of recurrent stroke, and high rate of death

Hémiplégie et tour du Mont Blanc : de l'espoir à la réalité

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