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Digital Signal Processing of Spatio-Temporal Electroencephalogram (EEG) Patterns Associated With Voluntary Motion Preparation

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Digital Signal Processing of Spatio-Temporal Electroencephalogram (EEG) Patterns Associated With Voluntary Motion Preparation  

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Hypothesis:  The preparation for execution of voluntary movements has been shown to influence the EEG measured at the scalp in at least two identifiable ways:

(1) The "Event Related Desynchronization" (ERD) or disruption of synchronized activity in the motor cortex that sets an idling low-frequency (8-12Hz) "mu-rhythm" over the motor cortex, and

(2) the transient occurence of characteristic spatio-temporal patterns in the EEG field on the side of the head, termed "Readiness Potentials" (RPs).

We propose that a Brain-Computer Interface for cursor control in a two-layer scheme could be developed once desynchronizations due to motion preparation can be detected and analyzed correctly.  We have identified two characterisitic EEG patterns from each side of the head that can be assigned to the four cursor directional commands: UP, DOWN, LEFT, and RIGHT, as a first step in developing the Brain-Computer interface.
 
   

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Hypothesis

Modules

Preliminary Results: Mu detection

Preliminary Results: Readiness Potentials Classification