Towards an intuitive communication-BCI: decoding visually imagined characters from the early visual cortex using high-field fMRI.Brain-computer interfaces aim to provide people with paralysis with the possibility to use their neural signals to control devices. 
fMRI
Towards an intuitive communication-BCI: decoding visually imagined characters from the early visual cortex using high-field fMRI.Brain-computer interfaces aim to provide people with paralysis with the possibility to use their neural signals to control devices.  For communication, most BCIs are based on the selection of letters from a (digital) letter board to spell words and sentences.  Visual mental imagery of letters could offer a new, fast and intuitive way to spell in a BCI-communication solution.  These properties, combined with the cortical location of the early visual cortex and its decodable activity, encourage further research on intracranial interfacing using surface electrodes to bring us closer to such a visual imagery based BCI communication solution.
BCI