Broca’s aphasia /brō″kəz/ [Pierre P. Broca, French neurologist, 1824–1880] , a type of aphasia consisting of nonfluent speech, with a laconic and hesitant, telegraphic quality caused by a large dominant hemisphere frontal lesion extending to the central sulcus. The patient’s agrammatic speech is characterized by abundant nouns and verbs but few articles and prepositions; the resulting speech is economic but lacking in syntax. Compare Wernicke’s aphasia.