Abstract
Brain Machine Interfaces (BMI) have shown great promise for quadriparetic patients after spinal cord injury. These usually entail high-density intracortical matrices of electrodes or subdural grids recording, filtering and processing cortical activity related to motor planning and execution. Patients (and nonhuman primates) have been able to control cursors on a computer screen or robotic arms with increasing proficiency. BMI systems can also be utilized to train individuals to produce certain cortical rhythms. For example, imagery of movement or thinking about movement can change cortical activity from one frequency domain into another and this can be reinforced by training if adequate feedback or rewards are given.
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