Brain-computer interface (BCI) allows collaboration between humans and machines. It translates the electrical activity of the brain to understandable commands to operate a machine or a device. In this study, we propose a method to improve the accuracy of a 3-class BCI using electroencephalographic (EEG) signals. This BCI discriminates rest against imaginary grasps and elbow movements of the same limb. This classification task is challenging because imaginary movements within the same limb have close spatial representations on the motor cortex area. The proposed method extracts time-domain features and classifies them using a support vector machine (SVM) with a radial basis kernel function (RBF). An average accuracy of 74.2% was obtained when using the proposed method on a dataset collected, prior to this study, from 12 healthy individuals. This accuracy was higher than that obtained when other widely used methods, such as common spatial patterns (CSP), filter bank CSP (FBCSP), and band power methods, were used on the same dataset. These results are encouraging and the proposed method could potentially be used in future applications including BCI-driven robotic devices, such as a portable exoskeleton for the arm, to assist individuals with impaired upper extremity functions in performing daily tasks.
P01Se01
EEG data were recorded from participant 1(session 1). For further details, please see the associated README file.
P01Session01.zip
P01Se02
EEG data were recorded from participant 1(session 2). For further details, please see the associated README file.
P01Session02.zip
P01Se03
EEG data were recorded from participant 1(session 3). For further details, please see the associated README file.
P01Session03.zip
P01Se04
EEG data were recorded from participant 1(session 4). For further details, please see the associated README file.
P01Session04.zip
P02Se01
EEG data were recorded from participant 2(session 1). For further details, please see the associated README file.
P02Session01.zip
P03Se01
EEG data were recorded from participant 3(session 1). For further details, please see the associated README file.
P03Session01.zip
P04Se01
EEG data were recorded from participant 4(session 1). For further details, please see the associated README file.
P05Se01
EEG data were recorded from participant 5(session 1). For further details, please see the associated README file.
P06Se01
EEG data were recorded from participant 6(session 1). For further details, please see the associated README file.
P07Se01
EEG data were recorded from participant 7(session 1). For further details, please see the associated README file.
P08Se01
EEG data were recorded from participant 8(session 1). For further details, please see the associated README file.
P09Se01
EEG data were recorded from participant 9(session 1). For further details, please see the associated README file.
P10Se01
EEG data were recorded from participant 10(session 1). For further details, please see the associated README file.
P11Se01
EEG data were recorded from participant 11(session 1). For further details, please see the associated README file.
P12Se01
EEG data were recorded from participant 12(session 1). For further details, please see the associated README file.
P02Se02
EEG data were recorded from participant 2(session 2). For further details, please see the associated README file.
P03Se02
EEG data were recorded from participant 3(session 2). For further details, please see the associated README file.
P04Se02
EEG data were recorded from participant 4(session 2). For further details, please see the associated README file.
P05Se02
EEG data were recorded from participant 5(session 2). For further details, please see the associated README file.
P06Se02
EEG data were recorded from participant 6(session 2). For further details, please see the associated README file.
P07Se02
EEG data were recorded from participant 7(session 2). For further details, please see the associated README file.
P08Se02
EEG data were recorded from participant 8(session 2). For further details, please see the associated README file.
P09Se02
EEG data were recorded from participant 9(session 2). For further details, please see the associated README file.
P10Se02
EEG data were recorded from participant 10(session 2). For further details, please see the associated README file.
P11Se02
EEG data were recorded from participant 11(session 2). For further details, please see the associated README file.
P12Se02
EEG data were recorded from participant 12(session 2). For further details, please see the associated README file.
P02Se03
EEG data were recorded from participant 2(session 3). For further details, please see the associated README file.
P03Se03
EEG data were recorded from participant 3(session 3). For further details, please see the associated README file.
P04Se03
EEG data were recorded from participant 4(session 3). For further details, please see the associated README file.
P05Se03
EEG data were recorded from participant 5(session 3). For further details, please see the associated README file.
P06Se03
EEG data were recorded from participant 6(session 3). For further details, please see the associated README file.
P07Se03
EEG data were recorded from participant 7(session 3). For further details, please see the associated README file.
P08Se03
EEG data were recorded from participant 8(session 3). For further details, please see the associated README file.
P09Se03
EEG data were recorded from participant 9(session 3). For further details, please see the associated README file.
P10Se03
EEG data were recorded from participant 10(session 3). For further details, please see the associated README file.
P11Se03
EEG data were recorded from participant 11(session 3). For further details, please see the associated README file.
P12Se03
EEG data were recorded from participant 12(session 3). For further details, please see the associated README file.
P02Se04
EEG data were recorded from participant 2(session 4). For further details, please see the associated README file.
P03Se04
EEG data were recorded from participant 3(session 4). For further details, please see the associated README file.
P04Se04
EEG data were recorded from participant 4(session 4). For further details, please see the associated README file.
P05Se04
EEG data were recorded from participant 5(session 4). For further details, please see the associated README file.
P06Se04
EEG data were recorded from participant 6(session 4). For further details, please see the associated README file.
P07Se04
EEG data were recorded from participant 7(session 4). For further details, please see the associated README file.
P08Se04
EEG data were recorded from participant 8(session 4). For further details, please see the associated README file.
P09Se04
EEG data were recorded from participant 9(session 4). For further details, please see the associated README file.
P10Se04
EEG data were recorded from participant 10(session 4). For further details, please see the associated README file.
P11Se04
EEG data were recorded from participant 11(session 4). For further details, please see the associated README file.
P12Se04
EEG data were recorded from participant 12(session 4). For further details, please see the associated README file.