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PubMed1983

The production of morphological and lexical opposites in aphasia.

Four unselected groups of Broca's, Wernicke's, conduction, amnesic aphasic patients and a group of normal controls were asked to produce the best opposite of 60 adjectives. For half of the stimuli the expected opposite was morphologically related to the stimulus word (e.g. "formal"/"informal"), for the other half it could be obtained only by selecting a new base-form within the lexicon (e.g. "good"/"bad"). Following some neurolinguistic observations by Hécaen et al., it was predicted that amnesic patients should produce mainly morphological opposites, whereas conduction aphasics should produce mainly lexical antonyms. Results confirmed the predictions, since amnesic aphasics showed a prevalent impairment in the selection lexical opposites, whereas conduction aphasics showed a selective impairment in the production of morphological antonyms.

Anomia↗
PubMed1985

Paralexic errors in Broca's and Wernicke's aphasia.

Paralexic speech errors were examined during the oral reading of sentences for 12 right-handed adults, including four Broca's aphasics, four Wernicke's aphasics and four patients with unilateral right-hemisphere lesions. A category system of error types was developed, and 129 errors were analyzed in terms of identifiable linguistic components, operating in isolation as well as interactively. The two aphasic groups produced a variety of errors, whereas the right-hemisphere group produced very few in number and type. Broca's aphasics committed more morphological errors than did Wernicke's aphasics, whereas Wernicke's aphasics committed more graphophonemic-neologistic errors than did Broca's.

Aphasia↗