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@article{Farina:2018:10.1109/TBME.2017.2762461,
author = {Farina, D and Yao and Sheng and Mrachacz-Kersting and Xiangyang and Ning},
doi = {10.1109/TBME.2017.2762461},
journal = {IEEE Transactions on Biomedical Engineering},
pages = {1689--1695},
title = {Decoding covert somatosensory attention by a BCI system calibrated with tactile sensation},
url = {http://dx.doi.org/10.1109/TBME.2017.2762461},
volume = {65},
year = {2018}
}
TY - JOUR
AB - Objective: We propose a novel calibration strategy to facilitate the decoding of covert somatosensory attention by exploring the oscillatory dynamics induced by tactile sensation. Methods: It was hypothesized that the similarity of the oscillatory pattern between stimulation sensation (SS, real sensation) and somatosensory attentional orientation (SAO) provides a way to decode covert somatic attention. Subjects were instructed to sense the tactile stimulation, which was applied to the left (SS-L) or the right (SS-R) wrist. The brain-computer interface (BCI) system was calibrated with the sensation data and then applied for online SAO decoding. Results: Both SS and SAO showed oscillatory activation concentrated on the contralateral somatosensory hemisphere. Offline analysis showed that the proposed calibration method led to a greater accuracy than the traditional calibration method based on SAO only. This is confirmed by online experiments, where the online accuracy on 15 subjects was 78.8 ± 13.1%, with 12 subjects >70% and 4 subject >90%. Conclusion: By integrating the stimulus-induced oscillatory dynamics from sensory cortex, covert somatosensory attention can be reliably decoded by a BCI system calibrated with tactile sensation. Significance: Indeed, real tactile sensation is more consistent during calibration than SAO. This brain-computer interfacing approach may find application for stroke and completely locked-in patients with preserved somatic sensation.
AU - Farina,D
AU - Yao
AU - Sheng
AU - Mrachacz-Kersting
AU - Xiangyang
AU - Ning
DO - 10.1109/TBME.2017.2762461
EP - 1695
PY - 2018///
SN - 0018-9294
SP - 1689
TI - Decoding covert somatosensory attention by a BCI system calibrated with tactile sensation
T2 - IEEE Transactions on Biomedical Engineering
UR - http://dx.doi.org/10.1109/TBME.2017.2762461
UR - http://hdl.handle.net/10044/1/51721
VL - 65
ER -