Two patients with agrammatic speech and unimpaired comprehension are presented and contrasted. Case 1 had an infarction involving precentral gyrus, subjacent white matter, and posterior and superior aspects of the insula, largely sparing Broca's area. His speech was slow and dysarthric, consisting of short disconnected phrases with some omission of lexical verbs. Case 2 had an unusual transient aphasia of acute onset without hemiplegia; speech rate, articulation, and sentence length and complexity appeared normal. Both patients tended to omit function words and finite verb inflections, but Case 2 did so much more than did Case 1. Neither patient showed impairment in any other area of language performance. Tentatively, Case 2 is described as being more morphologically impaired but less syntactically impaired than Case 1, while neither has damage to a central language processor.