Magnetoencephalographic Correlates of Apparent Motion Illusion of Beta Movement
| Autor: | Akira Imai, Keita Tanaka, Hiroki Takase, Y. Uchikawa |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
0301 basic medicine
Computer Networks and Communications media_common.quotation_subject Illusion General Physics and Astronomy Stimulus (physiology) 03 medical and health sciences 0302 clinical medicine Perception medicine Computer vision Motion perception Parietal region Electrical and Electronic Engineering media_common Mathematics medicine.diagnostic_test business.industry Applied Mathematics Beta movement Animation Magnetoencephalography 030104 developmental biology Signal Processing Artificial intelligence business 030217 neurology & neurosurgery |
| Zdroj: | Electronics and Communications in Japan. 99:46-54 |
| ISSN: | 1942-9533 |
| DOI: | 10.1002/ecj.11785 |
| Popis: | We examined the underlying mechanisms of the apparent motion illusion of beta movement by obtaining neuromagnetic responses of event-related fields ERFs. A simple setting for visual stimulation of two circles, presented 10i¾? apart horizontally, was used in experiment 1. The first circle, with a duration of 16.7i¾?ms, was followed by the second with three conditions of stimulus-onset-asynchrony: a 16.7i¾?ms, the two circles seen almost simultaneously, b 83.3i¾?ms, perceived optimally as beta movement, and c 549.8i¾?ms occurring isolatedly. In experiment 2, three conditions of real motion for visual stimulation were set: a six circles presented successively for one animation, b 14 circles for one animation, and c 34 circles for one animation. We applied minimum current estimates MCEs to obtain the source activity of the ERFs for beta movement, then calculated an average amplitude for each five 100-ms epoch after the second stimulus onset in experiment 1, and after the first stimulus onset in experiment 2. As the results, the optimal condition showed maximum activities in the first 100-ms epoch at the parietal region in experiment 1, suggesting that the motion components of the MCEs were emerging from this epoch. In experiment 2, three conditions of real motion evoked prolonged MCE activities for the temporal and central areas, suggesting that these components were changed with the "speed" of motion perception. The neuromagnetic activities of beta movement and motion perception may originate from parietal areas within 100i¾?ms after the perception of movement. |
| Databáze: | OpenAIRE |
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