Seeing speech in space and time: psychological and neurological findings

Unlike heard speech, some aspects of seen speech can be processed independently of their dynamic (temporal) characteristics. The extent to which speechreading may be supported, separately, by visual mechanisms for the analysis of still and moving events is considered in relation to some experimental findings with normal speaker/viewers, to results with neurological patients with circumscribed lesions to parts of the visual system that support the perception of movement, and to cortical imaging studies.