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The cumulative density function CDF was then estimated as follows: However, this finding differs from that obtained using a lognormal distribution.

Nevertheless, undisturbed postural stance condition produces small COM sways and hence COP sways, due to their dynamical relationshipso that those muscles sensors would be less influenced Rougier, Moreover, the subjects provided informed consent before inclusion in the study.

Controlling teshe upright posture: These findings suggest a single homogeneous group in terms of visual strategy. On the other hand, Chiari et al. Sensorimotor integration in human postural control. Body support effect on standing balance in the visually impaired elderly. Time adaptation of control mechanisms on adding or removing vision.

Teste de Romberg – Wikipédia, a enciclopédia livre

The removal of visual inputs increased the COP velocity in It also can explain why eventually some healthy subjects without visual deficit reduce the sway during eyes closed condition.

The role of vision in the body sway control: The Vm EC lognormal distributions have skewness greater than the respective ones estimated for the Vm EOand hence, are more asymmetric Table 1 ; Figure 2. Measurement of the visual contribution to postural steadiness from the COP movement: Hence, for each parameter distribution, the first M and second S lognormal moments were estimated and the best-fitted function adjusted using: Archives of Physical Medicine and Rehabilitation.


The assessment of body sway and the choice of the stability parameter s.

The influence of having the eyelids open or closed on undisturbed postural control. The human postural control during upright standing depends upon the central integration of afferent information from vestibular, somatosensory and visual systems Bear et al.

Additionally, Ray et al. On the other hand, similar skewness was observed among the RQ V distributions. Neural efficiency of athletes’ brain for upright standing: The sense of balance. The classical Romberg’s test based on stabilometric tests in eyes open EO and closed EC conditions was used for investigating the influence of visual feedback in the body sway control in healthy adult teeste.

Furthermore, the lognormal PDF mean values are close error lower than 0. Discussion As well known, the sensory feedbacks in the postural control system provide complementary and partially redundant information for body sway stabilization.

According to Levi and Klein and to Maeda et al. Hence, the RQv inter-individual variability may be mainly related to the spread in mean velocity during eyes closed condition.


This result agrees with Elliott et al.

Teste de Romberg

The orthostatic stability during eyes open condition seems to be similar between the subjects, independently of their RQ V values. Hence, this study support the hypothesis of the sensory integration control proposed by Jeka et al. The functional role of ds and peripheral vision in the control of posture.

One can conclude that RQ V derived from a single stabilometric trial could be not sufficient for the diagnosis of body sway control impairment by vision. The unimodal distribution observed in all Vm and RQ V histograms suggests that the subjects can be considered as coming from a single group in terms of visual strategy.