Ricardo Matias

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REGULAR ISSUE 1 A new intelligent approach for estimation of blood potassium concentration / Mashhour Bani Amer 9 Tetrahedral vs. polyhedral mesh size evaluation on flow velocity and wall shear stress for cerebral hemodynamic simulation / A mathematical model of epiphyseal development: hypothesis of growth pattern of the secondary ossification centre /(More)
In order to create musculoskeletal models that can be scalable to different subject specificities the calculation of the exact locations of muscle attachment is required. For this purpose, a scaling method is presented that estimates muscle attachment locations in homologous segments using three bony landmarks per segment. A data-set of 17 muscles'(More)
Emerging evidence suggests that scapular-focused therapeutic exercises hold promise for shoulder dynamic stability retraining. While recent findings show that therapeutic exercises can alter scapular neuromuscular function measured with muscle electromyography, no study has yet addressed the effects of kinematic biofeedback for improving scapulothoracic(More)
The complexity of shoulder mechanics combined with the movement of skin relative to the scapula makes it difficult to measure shoulder kinematics with sufficient accuracy to distinguish between symptomatic and asymptomatic individuals. Multibody skeletal models can improve motion capture accuracy by reducing the space of possible joint movements, and models(More)
To my parents and grandparents vi Acknowledgements This chapter in my life would not have been possible without all the emotional and scientific support of many people who have accompanied my route through these last years. First, I would like to demonstrate my sincere gratitude to my advisor, Professor Hugo Gamboa, for the opportunity he gave me. I am very(More)
Three-dimensional (3D) kinematic biofeedback can help identify scapular movement disorders and assist the subjects' motor relearning process by facilitating changes in physiological and biomechanical function through real-time knowledge of performance and result during or immediately after a task execution. This study assessed the effectiveness of 3D(More)
In this work, the accuracy of a transformation method to estimate muscle attachments based on three bony landmarks was assessed. A concept of mathematical error was introduced and applied to a data-set of 17 muscles' attachment lines from the shoulders of seven cadavers. Within the muscles' attachment lines from the studied data-set, mathematical error and(More)
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