Sousa, FilipaSilva, AugustaCouto, Ana Sofia Garcez Barbosa do2010-12-022010-12-022010http://hdl.handle.net/10400.14/3750A stroke is a public health problem, which is considered as the most important cause of morbidity and mortality worldwide. After the occurrence of a stroke, there are residual neurological and functional deficits such as hemiparesis, which compromise the ability to walk. Gait is one of the most common and fundamental standards of human movement. This study aimed to characterize the biomechanical gait pattern in patients with sequelae of a stroke as well as verify whether there are differences between this characterization of the injured leg and the uninjured one, based on the hemispheric lesion. In this study participated voluntarily 11 individuals of both sexes, with sequelae of a stroke, of which 6 with sequelae of injury on the left (53.83 ± 7.11 years) and the remaining 5 with sequelae of injury on the right (53 ± 13.68 years). The biomechanical characterization of locomotion was carried out through three-dimensional kinematic analysis, dynamometry and surface electromyography. The statistical procedures included the t-student test for paired samples. A significance level of 5% was here considered. In the kinematic analysis, there were found statistically significant differences in the parameters of stance and swing time, only in individuals with sequelae of injury on the left. Significant differences were also found in joint range of hip- joint in initial support sub-phases in both groups, and in the swing phase, only in individuals with sequelae of stroke on the right. In the knee joint the significant differences were perceived in the final stance sub-phase and swing phase in both groups of individuals. In the ankle joint were only observed statistically significant differences in individuals with sequelae of injury on the right. In the dynamometry analysis, the two components of ground reaction force showed statistically significant differences, mainly in patients with sequelae of stroke on the left. With the electromyographic analysis was observed that individuals with sequelae of a stroke on the left revealed statistically significant differences in the muscles rectus femoris, tibialis anterior and soleus. Whereas individuals with sequelae of stroke on the right spot showed statistically significant differences only in tibialis anterior and soleus. The biceps femoris muscle registered no statistically significant differences in both groups. Regarding the level of muscular co-activation there were statistically significant differences observed in the mid stance phase in the three joints in patients with sequelae of stroke on the left, and only at the level of co-activation of the ankle in individuals with sequelae of stroke on the right, in the initial stance phase.porAcidente vascular cerebralControlo neural da marchaAssimetria hemisféricaBiomecânicaCiclo de marchaStrokeNeural control of gaitHemispheric asymmetryBiomechanicsGait analysismaster thesis