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Learning to Modulate Sensorimotor Rhythms with Stereo Auditory Feedback for a Brain-Computer Interface

Biomedical Sciences Research Institute Computer Science Research Institute Environmental Sciences Research Institute Nanotechnology & Advanced Materials Research Institute

McCreadie, Karl, Coyle, DH and Prasad, G (2012) Learning to Modulate Sensorimotor Rhythms with Stereo Auditory Feedback for a Brain-Computer Interface. In: 34th Annual International Conference of the IEEE EMBS, San Diego. IEEE. 4 pp. [Conference contribution]

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Abstract

Motor imagery can be used to modulate sensorimotor rhythms (SMR) enabling detection of voltage fluctuations on the surface of the scalp using electroencephalographic (EEG) electrodes. Feedback is essential in learning how to intentionally modulate SMR in nonmuscularcommunication using a brain-computer interface (BCI). A BCI that is not reliant upon the visual modality for feedback is an attractive means of communication for the blind and the vision impaired and to release the visual channel for other purposes during BCI usage. The aim of this study is to demonstrate the feasibility of replacing the traditional visual feedback modality with stereo auditory feedback. Twenty participants split into equal groups took part in ten BCIsessions involving motor imagery. The visual feedback group performed best using two performance measures but did not show improvement over time whilst the auditory groupimproved as the study progressed. Multiple loudspeaker presentation of audio allows the listener to intuitively assign each of two classes to the corresponding lateral position in afree-field listening environment.

Item Type:Conference contribution (Paper)
Keywords:brain computer interface, BCI, auditory, EEG, sensorimotor rhythm
Faculties and Schools:Faculty of Computing & Engineering
Faculty of Computing & Engineering > School of Computing and Intelligent Systems
Research Institutes and Groups:Computer Science Research Institute
Computer Science Research Institute > Intelligent Systems Research Centre
ID Code:23426
Deposited By:Dr Damien Coyle
Deposited On:24 Sep 2012 15:57
Last Modified:24 Sep 2012 15:57

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