Chapter 4: Biopotential acquisition for brain-wheelchair interfaces

ENRIQUE SPINELLI; FEDERICO GUERRERO

Smart Wheelchairs and Brain-Computer Interfaces

Elsevier

Año: 2018; p. 65 - 91

Smart-wheelchairs require brain-computer interface (BCI) technology to issue commands. The combination of both can be deemed a brain?wheelchair interface (BWI). A key aspect of a BCI, or a BWI, is the instrumentation that allows acquiring biopotentials that convey the will of the user. The main biopotential used for wheelchair interfaces is the brain activity recorded at the scalp or EEG. Other biopotentials may be advantageous in hybrid schemes, such as the EOG and EMG. Those same biopotentials can perturbate the system when they mask brain signals. We deal mainly with EEG acquisition, but the concepts presented here are directly applicable to EOG and EMG acquisition.