sentence: Functional ROIs were defined in regions that Graves et al. found to be sensitive to lexical characteristics such as imageability [ angular gyrus ( AG ) , orth-phon consistency inferior temporal sulcus ( ITS ) , posterior fusiform gyrus ( pFG ) ] , bigram frequency [ posterior middle temporal gyrus ( MTG ) , posterior superior temporal gyrus ( pSTG ) ] , and word frequency ( pFG , AG ) .