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Selective sensation based brain-computer interface via mechanical vibrotactile stimulation.

Yao L, Meng J, Zhang D, Sheng X, Zhu X - PLoS ONE (2013)

Bottom Line: The proposed system was based on event-related desynchronization/synchronization (ERD/ERS), which had a correlation with processing of afferent inflow in human somatosensory system, and attentional effect which modulated the ERD/ERS.The experiments were carried out on nine subjects (without experience in selective sensation), and six of them showed a discrimination accuracy above 80%, three of them above 95%.The proposed BCI modality might well cooperate with existing BCI modalities in the literature in enlarging the widespread usage of BCI system.

View Article: PubMed Central - PubMed

Affiliation: State Key Laboratory of Mechanical System and Vibration, Shanghai Jiao Tong University, Shanghai, China.

ABSTRACT
In this work, mechanical vibrotactile stimulation was applied to subjects' left and right wrist skins with equal intensity, and a selective sensation perception task was performed to achieve two types of selections similar to motor imagery Brain-Computer Interface. The proposed system was based on event-related desynchronization/synchronization (ERD/ERS), which had a correlation with processing of afferent inflow in human somatosensory system, and attentional effect which modulated the ERD/ERS. The experiments were carried out on nine subjects (without experience in selective sensation), and six of them showed a discrimination accuracy above 80%, three of them above 95%. Comparative experiments with motor imagery (with and without presence of stimulation) were also carried out, which further showed the feasibility of selective sensation as an alternative BCI task complementary to motor imagery. Specifically there was significant improvement ([Formula: see text]) from near 65% in motor imagery (with and without presence of stimulation) to above 80% in selective sensation on some subjects. The proposed BCI modality might well cooperate with existing BCI modalities in the literature in enlarging the widespread usage of BCI system.

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Comparision of discrimination accuracy of left and right among motor imagery with and without presence of stimulation, and selective sensation.The blue bars indicated the discrimination accuracy of left and right hand motor imagery with presence of stimulation in session one. The red bars indicated the discrimination accuracy of left and right selective sensation in session two. The yellow bars indicated the discrimination accuracy of left and right hand motor imagery without presence of stimulation in session three.
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pone-0064784-g006: Comparision of discrimination accuracy of left and right among motor imagery with and without presence of stimulation, and selective sensation.The blue bars indicated the discrimination accuracy of left and right hand motor imagery with presence of stimulation in session one. The red bars indicated the discrimination accuracy of left and right selective sensation in session two. The yellow bars indicated the discrimination accuracy of left and right hand motor imagery without presence of stimulation in session three.

Mentions: In order to better understand the task difference between Motor Imagery with and without presence of stimulation and Selective Sensation, left and right classifications of session one(motor imagery with presence of stimulation), session two(selective sensation), session three(motor imagery without presence of stimulation), were compared as shown in Fig. 6. Subjects s1, s2, s8 showed classification accuracy of above 95% in all the three sessions, while subject s5 and s7 showed an improved classification accuracy of above 80% for reliable control in selective sensation BCI, which was significant improvement from motor imagery with and without presence of stimulation() and might be especially useful for people who were in difficulty with motor imagery BCI. While there was a drop in subject s9 from 90% accuracy in motor imagery in session one and three to 80% in selective sensation in session two. Subject s3, s6 hardly reached classification accuracy of 70% in almost all the three sessions, and subject s4 showed ability in control using motor imagery without presence of stimulation. In all, the results showed selective sensation task could be used as an additional BCI modality, and motor imagery with presence of stimulation could still be decoded as motor imagery without presence of stimulation in the literature.


Selective sensation based brain-computer interface via mechanical vibrotactile stimulation.

Yao L, Meng J, Zhang D, Sheng X, Zhu X - PLoS ONE (2013)

Comparision of discrimination accuracy of left and right among motor imagery with and without presence of stimulation, and selective sensation.The blue bars indicated the discrimination accuracy of left and right hand motor imagery with presence of stimulation in session one. The red bars indicated the discrimination accuracy of left and right selective sensation in session two. The yellow bars indicated the discrimination accuracy of left and right hand motor imagery without presence of stimulation in session three.
© Copyright Policy
Related In: Results  -  Collection

Show All Figures
getmorefigures.php?uid=PMC3675213&req=5

pone-0064784-g006: Comparision of discrimination accuracy of left and right among motor imagery with and without presence of stimulation, and selective sensation.The blue bars indicated the discrimination accuracy of left and right hand motor imagery with presence of stimulation in session one. The red bars indicated the discrimination accuracy of left and right selective sensation in session two. The yellow bars indicated the discrimination accuracy of left and right hand motor imagery without presence of stimulation in session three.
Mentions: In order to better understand the task difference between Motor Imagery with and without presence of stimulation and Selective Sensation, left and right classifications of session one(motor imagery with presence of stimulation), session two(selective sensation), session three(motor imagery without presence of stimulation), were compared as shown in Fig. 6. Subjects s1, s2, s8 showed classification accuracy of above 95% in all the three sessions, while subject s5 and s7 showed an improved classification accuracy of above 80% for reliable control in selective sensation BCI, which was significant improvement from motor imagery with and without presence of stimulation() and might be especially useful for people who were in difficulty with motor imagery BCI. While there was a drop in subject s9 from 90% accuracy in motor imagery in session one and three to 80% in selective sensation in session two. Subject s3, s6 hardly reached classification accuracy of 70% in almost all the three sessions, and subject s4 showed ability in control using motor imagery without presence of stimulation. In all, the results showed selective sensation task could be used as an additional BCI modality, and motor imagery with presence of stimulation could still be decoded as motor imagery without presence of stimulation in the literature.

Bottom Line: The proposed system was based on event-related desynchronization/synchronization (ERD/ERS), which had a correlation with processing of afferent inflow in human somatosensory system, and attentional effect which modulated the ERD/ERS.The experiments were carried out on nine subjects (without experience in selective sensation), and six of them showed a discrimination accuracy above 80%, three of them above 95%.The proposed BCI modality might well cooperate with existing BCI modalities in the literature in enlarging the widespread usage of BCI system.

View Article: PubMed Central - PubMed

Affiliation: State Key Laboratory of Mechanical System and Vibration, Shanghai Jiao Tong University, Shanghai, China.

ABSTRACT
In this work, mechanical vibrotactile stimulation was applied to subjects' left and right wrist skins with equal intensity, and a selective sensation perception task was performed to achieve two types of selections similar to motor imagery Brain-Computer Interface. The proposed system was based on event-related desynchronization/synchronization (ERD/ERS), which had a correlation with processing of afferent inflow in human somatosensory system, and attentional effect which modulated the ERD/ERS. The experiments were carried out on nine subjects (without experience in selective sensation), and six of them showed a discrimination accuracy above 80%, three of them above 95%. Comparative experiments with motor imagery (with and without presence of stimulation) were also carried out, which further showed the feasibility of selective sensation as an alternative BCI task complementary to motor imagery. Specifically there was significant improvement ([Formula: see text]) from near 65% in motor imagery (with and without presence of stimulation) to above 80% in selective sensation on some subjects. The proposed BCI modality might well cooperate with existing BCI modalities in the literature in enlarging the widespread usage of BCI system.

Show MeSH