摘要：Numerous models of semantic memory have been informed by patterns of naming impairment in two primary temporal lobe pathologies: Alzheimer’s Disease (AD) and Semantic Dementia (SD). One hypothesis holds that AD represents a disconnection syndrome characterized by impaired semantic access, whereas SD reflects loss of core conceptual knowledge. However, this apparent dissociation between AD and SD as disorders of access versus semantic storage is not without controversy (see Rogers and Friedman, 2008). In the current study we tested this hypothesis using a large sample of AD and SD patients. The partially distinct patterns of anomia we observed are consistent with diftrential impairment to access and storage in the two patient populations.
