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    Caracterização do comportamento biomecânico do pé pronado e neutro durante tarefas funcionais, em indivíduos assintomáticos, por meio da análise cinemática tridimensional
    (Universidade Federal de São Paulo (UNIFESP), 2015-03-09) Ferreira, Cintia Lopes [UNIFESP]; Yi, Liu Chiao [UNIFESP]; Lucareli, Paulo Roberto Garcia; http://lattes.cnpq.br/9905380373300754; http://lattes.cnpq.br/6106154677645509; http://lattes.cnpq.br/3078580296713478; Universidade Federal de São Paulo (UNIFESP)
    Introduction: The three-dimensional kinematic analysis has been allowed understand the multi-segmental biomechanical behavior of foot. However, little is known about their kinematic behavior in functional tasks even the gait. Objective: Analyze and compare the kinematic behavior between neutral and pronated feet during squat phase of Anterior and Lateral Step Down (ASD and LSD) tests, and during the stance phase of stair ascent and descent cycle. Methods: Forty-two feet were evaluated. According to the Foot Posture Index, Navicular Drop and Calcaneal Angle, and subdivided into neutral foot (18) and pronated foot (24). For kinematic analysis, nine movements of squat of each test (ASD and LSD) and three cycles of stair ascent and three cycles of stair descent were collected bilaterally for each participant using a three-dimensional capture system of motion, the Oxford Foot Model, and processed by Vicon Nexus® software. The range of motion (ROM) to the four tasks and the angle and temporal values during the stair ascent and descent were analyzed in the three planes of motion for the segments: hindfoot relative to the floor (HFTFL); hindfoot relative to the tibia (HFTBA); forefoot relative to the tibia (FFTBA); and forefoot relative to the hindfoot (FFHFA). For the statistical analysis the MANOVA test was used, adopting the alpha error of 5% (p <0.05). Results: Differences were found for the step down tests for the following segments: HFTFL and FFHFA with lower plantar flexion and dorsiflexion to the pronated foot, respectively, in both tests. For the ASD, the pronated foot, in the frontal plane, showed lower ROM of pronation to FFTBA and FFHFA, while the HFTFL presented ROM of eversion for the neutral foot, and the pronated foot an excursion near zero. During LSD was observed also high ROM of dorsiflexion for the FFTBA. For stair ascent no differences were found between the groups. For stair descent, the differences were concentrated in the sagittal plane, with lower ROM for the pronated foot during the first and second double support, and high ROM during simple support. Besides in the frontal plane was observed lower angular values to the forefoot and in the transversal plane high angular values for the FFHFA and FFTBA. Conclusion: The pronated and neutral feet differ in kinematic behavior during ASD, LSD and stair descent tasks. These kinematic differences found concentrated in the sagittal plane for the three analyzed tasks and in the forefoot segment for descend stairs.