Virtual reality as a tool for evaluation of repetitive rhythmic movements in the elderly and Parkinson's disease patients
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Virtual reality as a tool for evaluation of repetitive rhythmic movements in the elderly and Parkinson's disease patientsData
2012-01-18Cita bibliográfica
Arias P, Robles-García V, Sanmartín G, Flores J, Cudeiro J. Virtual reality as a tool for evaluation of repetitive rhythmic movements in the elderly and Parkinson's disease patients. PLoS One. 2012;7(1):e30021
Resumo
[Abstract] This work presents an immersive Virtual Reality (VR) system to evaluate, and potentially treat, the alterations in rhythmic
hand movements seen in Parkinson’s disease (PD) and the elderly (EC), by comparison with healthy young controls (YC). The
system integrates the subjects into a VR environment by means of a Head Mounted Display, such that subjects perceive
themselves in a virtual world consisting of a table within a room. In this experiment, subjects are presented in 1st person
perspective, so that the avatar reproduces finger tapping movements performed by the subjects. The task, known as the
finger tapping test (FT), was performed by all three subject groups, PD, EC and YC. FT was carried out by each subject on
two different days (sessions), one week apart. In each FT session all subjects performed FT in the real world (FTREAL) and in
the VR (FTVR); each mode was repeated three times in randomized order. During FT both the tapping frequency and the
coefficient of variation of inter-tap interval were registered. FTVR was a valid test to detect differences in rhythm formation
between the three groups. Intra-class correlation coefficients (ICC) and mean difference between days for FTVR (for each
group) showed reliable results. Finally, the analysis of ICC and mean difference between FTVR vs FTREAL, for each variable and
group, also showed high reliability. This shows that FT evaluation in VR environments is valid as real world alternative, as VR
evaluation did not distort movement execution and detects alteration in rhythm formation. These results support the use of
VR as a promising tool to study alterations and the control of movement in different subject groups in unusual
environments, such as during fMRI or other imaging studies.
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Creative Commons Attribution 4.0 International Licence (CC-BY 4.0)