Restoration of finger and arm movements using hybrid brain/neural assistive technology in everyday life environments

Abstract

Controlling advanced robotic systems with brain signals promises sub-stantial improvements in health care, for example, to restore intuitive control of hand movements after severe stroke or spinal cord injuries (SCI). However, such integrated, brain-or neural-controlled robotic systems have yet to enter broader clinical use or daily life environments. The main challenge to integrate such systems in everyday life environments relates to the reliability of brain-control, particularly when brain signals are recorded non-invasively. Using a non-invasive, hybrid EEG-EOG-based brain/neural hand exoskeleton (B/NHE), we demonstrate full restoration of activities of daily living (ADL), such as eating and drinking, across six paraplegic individuals (five males, 30 ± 14 years) outside the laboratory. In a second set of experiments, we show that even whole-arm exoskeleton control is feasible and safe by combining hybrid brain/neural control with vision-guided and context-sensitive autonomous robotics. Given that recent studies indicate neurological recovery after chronic stroke or SCI when brain-controlled assistive technology is repeatedly used for 1–12 months, we suggest that combining an assistive and rehabilitative approach may further promote brain-machine interface (BMI) technology as a standard therapy option after stroke and SCI. In such scenario, brain/neural-assistive technology would not only have an immediate impact on the quality of life and autonomy of individuals with brain or spinal cord lesions but would also foster neurological recovery by stimulating functional and structural neuroplasticity.