Visemic processing in audiovisual discrimination of natural speech: A simultaneous fMRI-EEG study

► Simultaneous fMRI/EEG were recorded during audiovisual speech discrimination tasks. ► We compared audiovisual speech discrimination with and without articulatory movements. ► Visual perception of speech articulation helps discrimination of phonetic features. ► Phonological discrimination with dynamic cues activates the premotor cortex. ► Visual dynamic cues contribute to speech discrimination as early as 150 ms.