Past tense in the brain's time: Neurophysiological evidence for dual-route processing of past-tense verbs

► Auditory MEG responses differentiate between monomorphemic and complex words ► Inflected verbs exhibit grammatical response patterns similar to multi-word phrases. ► Our data support dual-route, rule-based models of morphological processing. ► Neurophysiology can be used to study neural mechanisms of combinatorial processing.