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Brain-Computer Interface (BCI) Muscle-independent communication channel

Brain-Computer Interface (BCI) Muscle-independent communication channel. Two general approaches : rhythm generation (neurofeedback approach) natural correlates (QEEG assessment approach) Greatest obstacles Humans habituate Speed is slow, thus motivation must be high

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Brain-Computer Interface (BCI) Muscle-independent communication channel

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  1. Brain-Computer Interface (BCI)Muscle-independent communication channel • Two general approaches: • rhythm generation (neurofeedback approach) • natural correlates (QEEG assessment approach) • Greatest obstacles • Humans habituate • Speed is slow, thus motivation must be high • Training also slower for patients, generally, than normals • Interference and distraction (a divided attention task) • Current formulations requires a patient to pay attention to contents of communication while simultaneously following generative rules of the communication device. • Impaired visual systems • Instability, noise and/or lack of our understanding of human EEG

  2. Approaches • QEEG approach • P300 • VEP • Neurofeedback • Motor imagery • SMR incidence • Slow potentials

  3. Speeds are generally characters per minute Imagery • 1. think about nothing • 2. solve multiplication • 3. mentally rotate • 4. mentally write a letter to friend • 5. visualize numbers being written on board sequentially

  4. BCI Applications • Workload shunting • Augmented reality (instead of VR) • Locked-in syndrome • ALS, encephalitis, brainstem stroke • Quality of life, extreme social restriction • Other applications not yet imagined or designed

  5. BCI (for kaiser’s notes only)

  6. EC1 baseline EO1 baseline Task 1 Site 1 activates, Site 2 no change Task 2 Site 1 no change, Site 2 activates EC2 baseline EO2 baseline Limitations: Macrostate, Alpha activity only, post-hoc artifact control Search literature to identify two tasks studied by EEG or fMRI, and the complementary sites Team Projects

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