A brain-computer interface with vibrotactile biofeedback for haptic information
Identifieur interne : 000C53 ( Ncbi/Checkpoint ); précédent : 000C52; suivant : 000C54A brain-computer interface with vibrotactile biofeedback for haptic information
Auteurs : Aniruddha Chatterjee [États-Unis] ; Vikram Aggarwal [États-Unis] ; Ander Ramos [Espagne] ; Soumyadipta Acharya [États-Unis] ; Nitish V. Thakor [États-Unis]Source :
- Journal of NeuroEngineering and Rehabilitation [ 1743-0003 ] ; 2007.
English descriptors
- KwdEn :
- MESH :
- methods : Biofeedback, Psychology, Electroencephalography.
- physiology : Brain, Evoked Potentials, Somatosensory, Imagination, Touch.
- Adult, Female, Humans, Male, Task Performance and Analysis, User-Computer Interface, Vibration.
Abstract
It has been suggested that Brain-Computer Interfaces (BCI) may one day be suitable for controlling a neuroprosthesis. For closed-loop operation of BCI, a tactile feedback channel that is compatible with neuroprosthetic applications is desired. Operation of an EEG-based BCI using only
A Mu-rhythm based BCI using a motor imagery paradigm was used to control the position of a virtual cursor. The cursor position was shown visually as well as transmitted haptically by modulating the intensity of a vibrotactile stimulus to the upper limb. A total of six subjects operated the BCI in a two-stage targeting task, receiving only vibrotactile biofeedback of performance. The location of the vibration was also systematically varied between the left and right arms to investigate location-dependent effects on performance.
Subjects are able to control the BCI using only vibrotactile feedback with an average accuracy of 56% and as high as 72%. These accuracies are significantly higher than the 15% predicted by random chance if the subject had no voluntary control of their Mu-rhythm. The results of this study demonstrate that vibrotactile feedback is an effective biofeedback modality to operate a BCI using motor imagery. In addition, the study shows that placement of the vibrotactile stimulation on the biceps ipsilateral or contralateral to the motor imagery introduces a significant bias in the BCI accuracy. This bias is consistent with a drop in performance generated by stimulation of the contralateral limb. Users demonstrated the capability to overcome this bias with training.
Url:
DOI: 10.1186/1743-0003-4-40
PubMed: 17941986
PubMed Central: 2104531
Affiliations:
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PMC:2104531Le document en format XML
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<front><div type="abstract" xml:lang="en"><sec><title>Background</title>
<p>It has been suggested that Brain-Computer Interfaces (BCI) may one day be suitable for controlling a neuroprosthesis. For closed-loop operation of BCI, a tactile feedback channel that is compatible with neuroprosthetic applications is desired. Operation of an EEG-based BCI using only <italic>vibrotactile feedback</italic>
, a commonly used method to convey haptic senses of contact and pressure, is demonstrated with a high level of accuracy.</p>
</sec>
<sec sec-type="methods"><title>Methods</title>
<p>A Mu-rhythm based BCI using a motor imagery paradigm was used to control the position of a virtual cursor. The cursor position was shown visually as well as transmitted haptically by modulating the intensity of a vibrotactile stimulus to the upper limb. A total of six subjects operated the BCI in a two-stage targeting task, receiving only vibrotactile biofeedback of performance. The location of the vibration was also systematically varied between the left and right arms to investigate location-dependent effects on performance.</p>
</sec>
<sec><title>Results and Conclusion</title>
<p>Subjects are able to control the BCI using only vibrotactile feedback with an average accuracy of 56% and as high as 72%. These accuracies are significantly higher than the 15% predicted by random chance if the subject had no voluntary control of their Mu-rhythm. The results of this study demonstrate that vibrotactile feedback is an effective biofeedback modality to operate a BCI using motor imagery. In addition, the study shows that placement of the vibrotactile stimulation on the biceps ipsilateral or contralateral to the motor imagery introduces a significant bias in the BCI accuracy. This bias is consistent with a drop in performance generated by stimulation of the contralateral limb. Users demonstrated the capability to overcome this bias with training.</p>
</sec>
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</front>
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