The study explored the nature of the relation between phonological working memory and sentence comprehension in conduction and agrammatic aphasia. We compared two types of processing required during sentence comprehension: syntactic-semantic and word-form(phonological) reactivation, in 12 individuals with input-buffer conduction-aphasia(repetition), 3 with output-buffer conduction aphasia(reproduction) and 7 with agrammatism. This was done via the analysis of comprehension of relative-clauses, sentence with lexical ambiguity, and rhyming judgment. The results of the 3 experiments indicated that phonological working memory limitation only hampers comprehension when phonological reactivation is required, and the distance between the initial word and its reactivation exceeds the WM limitation
