ISCA Archive AVSP 2001
ISCA Archive AVSP 2001

Cortical substrates of seeing speech: still and moving faces

G. A. Calvert, M. J. Brammer, Ruth Campbell

Seen speech is dynamically produced and is usually perceived as a natural movement sequence. However, it can (also) be processed as sequences of prototype images of mouth positions (eg closed lips for bilabials, specific mouth shapes for point vowels - that is as stilled images. Using a novel paradigm controlling carefully for movement artifacts between still frames, we present fMRI evidence for partially dissociable cortical networks for reading speech from stilled and moving faces.