A 3-D Virtual Reality Based Sensory Oddball Task for Eliciting P300
| Autor: | Kai-Chiun Li, 李開群 |
|---|---|
| Rok vydání: | 2012 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 100 P300 is elicited in an oddball paradigm and associated with attention. In this study, we aim to establish a novel protocol using 3-D Virtual Reality technique to elicit the somatosensory P300 components. Twelve healthy, right-handed subjects were instructed to perform a ball catch task using their dominant hand under a 3-D Virtual Reality scheme. The ball catch task has two conditions: standard (with force feedback) and target (without force feedback), with the 479 and 121 trials (i.e. 80% and 20% occurring rate), respectively. The feedback force in the standard condition was delivered to the subjects via a haptic feedback system. 32 channels electroencephalogram (EEG) were recorded with 250 Hz sampling rate during the task. The data were epoched from -500 to +2500 ms, and filtered with 0.1-59 Hz band-pass filter. The window of interest was set to be between +248 to +800 ms after ball catch. Independent Component Analysis (ICA) was employed to remove the electrooculogram (EOG) interference according to spatial and temporal criteria. There is strong evidence suggesting that P300 components were elicited at Pz (p |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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