Encontrados 47 documentos, a visualizar página 1 de 5
Morfometria do trato vocal por ressonância magnética: simulação de padrões pato...
Ventura, Sandra M. Rua; Freitas, Diamantino Rui S.; Ramos, Isabel Maria A. P.; Tavares, João Manuel R. S.Introdução – A análise da forma ou morfometria de estruturas anatómicas, como o trato vocal, pode ser efetuada a partir de imagens bidimensionais (2D) como de aquisições volumétricas (3D) de ressonância magnética (RM). Esta técnica de imagem tem vindo a ter uma utilização crescente no estudo da produção da fala. Objetivos – Demonstrar como pode ser efetuada a morfometria do trato vocal a partir da imagem por re...
The influence of pauses on the fatigue of upper limb muscles during the task of...
Fernandes, Ângela; Santos, Rubim; Rocha, Nuno; Tavares, João ManuelThe aim of this study was to analyze the influence of position and pauses on muscle activity and fatigue during the task of ironing. Ten female participants performed the task of ironing in two different positions (standing and sitting) for 10 min each with a 1-min pause at the end of each task. Muscle activity and fatigue from the upper trapezium, anterior deltoid, and pectoralis major were analyzed using surf...
Drilling damage in composite material
Durão, Luís M.; Tavares, João Manuel R. S.; Albuquerque, Victor Hugo C. de; Marques, Jorge Filipe S.; Andrade, Oscar N.G.The characteristics of carbon fibre reinforced laminates have widened their use from aerospace to domestic appliances, and new possibilities for their usage emerge almost daily. In many of the possible applications, the laminates need to be drilled for assembly purposes. It is known that a drilling process that reduces the drill thrust force can decrease the risk of delamination. In this work, damage assessment...
Influence of wearing an unstable shoe construction on compensatory control of p...
Sousa, Andreia S. P.; Macedo, Rui; Santos, Rubim; Tavares, João ManuelThis study investigated the influence of wearing unstable shoe construction (WUS) on compensatory postural adjustments (CPA) associated with external perturbations. Thirty-two subjects stood on a force platform resisting an anterior-posterior horizontal force applied to a pelvic belt via a cable, which was suddenly released. They stood under two conditions: barefoot and WUS. The electromyographic (EMG) activity...
Influence of long-term wearing of unstable shoes on compensatory control of pos...
Sousa, Andreia S. P.; Silva, Andreia; Macedo, Rui; Santos, Rubim; Tavares, João ManuelPurpose: This study investigated the influence of long-term wearing of unstable shoes (WUS) on compensatory postural adjustments (CPA) to an external perturbation. Methods: Participants were divided into two groups: one wore unstable shoes while the other wore conventional shoes for 8 weeks. The ground reaction force signal was used to calculate the anterior– posterior (AP) displacement of the centre of pressur...
Interlimb relation during the double support phase of gait: an electromyographi...
Sousa, Andreia S. P.; Silva, Augusta; Tavares, João ManuelThe purpose of this study is to analyse the interlimb relation and the influence of mechanical energy on metabolic energy expenditure during gait. In total, 22 subjects were monitored as to electromyographic activity, ground reaction forces and VO2 consumption (metabolic power) during gait. The results demonstrate a moderate negative correlation between the activity of tibialis anterior, biceps femoris and vast...
Interlimb coordination during the stance phase of gait in subjects with stroke
Sousa, Andreia S. P.; Silva, Augusta; Santos, Rubim; Sousa, Filipa; Tavares, João ManuelObjective: To analyze the relation between contralesional and ipsilesional limbs in subjects with stroke during step-to-step transition of walking. Design: Observational, transversal, analytical study with a convenience sample. Setting: Physical medicine and rehabilitation clinic. Participants: Subjects (nZ16) with poststroke hemiparesis with the ability to walk independently and healthy controls (nZ22). Interv...
Activation timing of soleus and tibialis anterior muscles during sit-to-stand a...
Silva, Augusta; Santos, Rubim; Sousa, Andreia S. P.; Pinheiro, Ana Rita; Ferraz, Joana; Tavares, João Manuel; Sousa, FilipaO documento em anexo encontra-se na versão post-print (versão corrigida pelo editor). ; Introduction: Sit-to-stand (SitTS) and stand-to-sit (StandTS) are very important functional tasks that become compromised in stroke patients. As in other voluntary movements, they require an adequate postural control (PC) involving the generation of anticipatory postural adjustments (APAs). In order to give clues for more e...
Computational modelling of cellular effects post-irradiation with low- and high...
Adriana Alexandre S. Tavares; João Manuel R. S. TavaresThe use of computational methods to improve the understanding of biological responses to various types of radiation is an approach, where multiple parameters can be modelled and a variety of data is generated. This study compares cellular effects modelled for low absorbed doses against high absorbed doses. The authors hypothesized that low and high absorbed doses would contribute to cell killing via different m...
Ankle dynamic in stroke patients: agonist vs. antagonist muscle relations
Silva, Augusta; Sousa, Andreia S. P.; Tavares, João Manuel; Tinoco, Ana; Santos, Rubim; Sousa, FilipaO documento em anexo encontra-se na versão post-print (versão corrigida pelo editor). ; Introduction: Atypical ankle patterns of muscle activity during gait are commonly reported in patients with stroke. These findings can be due to changes between tibialis anterior (TA) and soleus (SOL) coactivation mechanisms. Objective: To compare the electromyographic activity (EMGa) of SOL and TA muscles and antagonist co...
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