Influência do tamanho e rigidez dos objetos no alcance manual de crianças saudáveis de 6 a 36 meses de vida
Abstract
Studies have been identified both changes in the body and in the environment induce
adjustments on the reaching, however few studies verified the influence of the size and
rigidity of objects longitudinally in the period of 6 to 36 months, mainly employing the
kinematic analysis and qualitative analysis of movements. Thus, two studies were conducted
major (Studies 2 and 3) and a complementary study (Study 1). The aim of the Study 1 was to
testing whether Dvideow system is a sensitive, objective and reliable instrument in the
kinematic analysis of infant s reaching movement in the period of 4 to 6 months. Based on the
positive results of this study has been the use of the system for analysis Dvideow kinematics
of the reaching movement into Study 2. The aim of Study 2 was to verify the influence of the
size and rigidity of the objects in the reach of children at 6, 7, 8 and 36 months. According to
the results of this study are realized the importance of also qualitatively analyze the reaching
movements, being carried out the Study 3. The aim of Study 3 was to analyze the influence of
the size and rigidity of objects in proximal and distal adjustments of reach in the period of 6 to
36 months. Thus, nine healthy infants were positioned in a infant chair with 50° horizontal.
Four objects were presented, a large rigid, a small rigid, a large and a small soft for a period
of 1 minute each. The movements were filmed by three digital cameras. It was found that
reaching from 6 to 36 months is characterized by changes both in cinematic and qualitative
variables, which modify when necessary according to the most discrepance properties of the
objects presented. It is suggested that this is a period of refinement of reach manual, in which
the motor system continuous adjustments are made according to age (physical growth,
improvement in postural control, differences in the perception of the objects in each age), the
experience and environment, which in turn, can only promote changes in the parameters of
the control needed to carry out the task