Figure 3. Braille principles, and MRI-compatible recording system.

A. Braille reading vs Braille writing. In Braille reading (upper panel), the raised-dot matrices are read from left to right, as in Western text. The letter V is shown as a specific example. The procedure for Braille writing (lower panel) is more complicated. The paper is turned faced down the dots are made from the back of the page, requiring the cells to be punched by the stylus from right to left in the form of mirror writing, both within the cells and across the page, so as to be able to read from left to right when flip the paper is inverted for reading. B. Scanning methodology. The participant lying with his head in the head coil on the scanner bed about to be slid into the scanner bore, showing our custom plexiglass lectern on which the Braille tablet is mounted for reading and writing during the fMRI scans.