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Erschienen in:
2014 | OriginalPaper | Buchkapitel
Motion-Related VEPs Elicited by Dynamic Virtual Stimulation
verfasst von : P. J. G. Da Silva, B. P. Rosa, M. Cagy, A. F. C. Infantosi
Erschienen in: XIII Mediterranean Conference on Medical and Biological Engineering and Computing 2013
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The coherent average was used for investigating the motion-related VEP (M-VEP). The electroencephalogram (EEG) signals of 29 healthy subjects were acquired during stabilometric protocol with distinct virtual scenes: static (SS) and dynamic (forward, DS
F
, or backward motion, DS
B
). The grand-averaged M-VEP for these visual conditions presented N2 peak dominance with higher values for parietal EEG derivation. The DS increased the N2 peak and latency, as well as the N2 ( P3 amplitude, in comparison with SS. These components are not sensitive to motion orientation (t-test
α
= 0.05). However, the running
t
-test (
α
= 0.05) showed difference in the DS
F
( DS
B
waveforms 600 ms after the DS onset, with an increasing time delay from the occipital to central derivations. These findings suggest that the cognitive, planning and motor processing to maintain balance depends on the virtual scene direction.