The noun/verb dissociation in language production: Varieties of causes

Marcella Laiacona, Alfonso Caramazza

Research output: Contribution to journalArticlepeer-review


We report the performance of two patients who presented with complementary deficits in naming nouns relative to verbs: EA performed far worse with nouns than verbs, while MR performed worse with verbs than nouns. The two patients' grammatical category-specific deficits could not easily be explained in terms of damage to specific types of semantic knowledge prototypically associated with nouns (visual properties) and verbs (action features). One of the two patients, MR, also presented with a selective deficit in processing verbal as opposed to nominal morphology, in line with her impairment in naming verbs. The other patient, EA, showed no impairment in producing nominal and regular verbal morphology. The contrasting patterns of grammatical category-specific deficits in naming and morphological processing, along with other recently reported patterns, are interpreted as providing support for the claim that semantic and grammatical properties independently contribute to the organisation of lexical processes in the brain.

Original languageEnglish
Pages (from-to)103-123
Number of pages21
JournalCognitive Neuropsychology
Issue number2-4
Publication statusPublished - Mar 2004

ASJC Scopus subject areas

  • Cognitive Neuroscience
  • Psychology(all)
  • Experimental and Cognitive Psychology


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