Clinical biomechanics
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Clinical biomechanics · Mar 2000
In vivo kinematic study of normal wrist motion: an ultrafast computed tomographic study.
To quantify in vivo carpal kinematics of a normal wrist in a dynamic continuous model. ⋯ In this study, we demonstrated the suitability of using two-dimensional computed tomographic images in a quantitative study of flexion/extension kinematics of the normal wrist.
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Clinical biomechanics · Mar 2000
Biexponential recovery model of lumbar viscoelastic laxity and reflexive muscular activity after prolonged cyclic loading.
To determine the rest duration required for full recovery of reflexive muscular activity and laxity/creep induced in the lumbar viscoelastic structures (e.g., ligaments, discs, etc.) after 50 min of cyclic loading, and to develop a model describing such recovery. ⋯ Although the data was derived from a feline model, and its extrapolation to the human model is not straightforward, the general pattern of decreasing reflexive muscular activity with cyclic loading is expected in both species. Therefore, workers who subject their spine to periods of cyclic loading may be exposed to prolonged periods of laxity beyond the neutral zone limits, without protection from the muscles and therefore the risk of possible injury and low back pain. Pain and muscle hyperexcitability could also be a factor associated with cyclic loading, being expressed several hours after work was completed.
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Clinical biomechanics · Feb 2000
Clinical Trial Controlled Clinical TrialIntrasubject repeatability of gait analysis data in normal and spastic children.
To evaluate intrasubject repeatability of data obtained from computer-aided motion analysis in normal and spastic children. ⋯ The results of this study should be of interest to clinicians who make therapeutic decisions in patients with cerebral palsy using gait analysis data, and for scientists studying normal and pathological gait.
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Clinical biomechanics · Feb 2000
Superiority of incremental trauma approach in experimental burst fracture studies.
To compare the incremental and single trauma approaches in experimental spinal trauma production. ⋯ The design of experimental traumas studies will benefit from the results of the present comparative evaluation of single and incremental trauma approaches. The quality of the experiment may be significantly improved.
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Clinical biomechanics · Jan 2000
Upper limb tension tests as tools in the diagnosis of nerve and plexus lesions. Anatomical and biomechanical aspects.
To analyse the validity of nerve tension tests used in the diagnosis of nerve (root) and plexus lesions of the upper extremity. ⋯ Before nerve tension tests for the median, ulnar and radial nerves can be introduced to clinical practice it is necessary to assess their validity quantitatively.