Remote Wireless Oral Control of a Robotic Manipulator and a Powered Wheelchair, and Its Evaluation with Paralyzed Users

The objective of this feasibility study was to demonstrate and evaluate a remotely tongue-controlled wheelchair mounted assistive robotic manipulator (ARM), for the first time with end users: three individuals with cervical spinal cord injury. For three days, they remotely tongue-controlled the wheelchair and the ARM (WMARM) to complete two activities of daily living (ADL): Driving the wheelchair and ARM to a remote setting to (1) pick up a bottle and (2) pick up a ball. The participants controlled the system using full manual control by tongue and through semi-automation. Finally, the participants answered a NASA Task Load Index (TLX) questionnaire and a semi-structured interview. Results: All participants were able to remotely control the WMARM by tongue. Semi-automation resulted in shorter task completion time, gripping time and fewer commands as compared with manual control. Semi-automation decreased the measured mental load in the NASA TLX questionnaire by an average of 57%. The participants rated high satisfaction with the system. Conclusion: It was possible for the users with tetraplegia to control the wheelchair with the ARM using their tongue to perform ADL in Wi-Fi-based remote setting. This proposed system has the potential to increase independence and social interaction of individuals with tetraplegia.