Category-Specific Semantic Deficits in Focal and Widespread Brain Damage: A Computational Account

@article{Devlin1998CategorySpecificSD,
  title={Category-Specific Semantic Deficits in Focal and Widespread Brain Damage: A Computational Account},
  author={Joseph T. Devlin and Laura M. Gonnerman and Elaine Andersen and Mark S. Seidenberg},
  journal={Journal of Cognitive Neuroscience},
  year={1998},
  volume={10},
  pages={77-94}
}
Category-specific semantic impairments have been explained in terms of preferential damage to different types of features (e.g., perceptual vs. functional). This account is compatible with cases in which the impairments were the result of relatively focal lesions, as in herpes encephalitis. Recently, however, there have been reports of category-specific impairments associated with Alzheimer's disease, in which there is more widespread, patchy damage. We present experiments with a connectionist… 

Double Dissociation of Semantic Categories in Alzheimer's Disease

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Category-Specific Deficits in a Self-Organizing Model of the Lexical-Semantic System

This work proposes that selective semantic impairments arise from damage to a system that includes a categorically organized lexical-semantic level (referred to as lemma level), that is a level “binding” semantic features to other kinds of representations (e.g., visual, phonological, orthographic, etc.).

Testing a Computational Account of Category-Specific Deficits

  • C. Perry
  • Psychology
    Journal of Cognitive Neuroscience
  • 1999
The model was found to be deficient in all four areas and results reported may have been idiosyncratic to the model and not reflect general properties of a real semantic system.

Conceptual Structure and the Structure of Concepts: A Distributed Account of Category-Specific Deficits

A new account of the fine-grained structure of semantic categories derived from neuropsychological, behavioral, and developmental data is presented, claiming that the distinctiveness of functional features correlated with perceptual features varies across semantic domains and that category structure emerges from the complex interaction of these variables.

Anatomic Constraints on Cognitive Theories of Category Specificity

Many cognitive theories of semantic organization stem from reports of patients with selective, category-specific deficits for particular classes of objects (e.g., fruit). The anatomical assumptions

Can segregation within the semantic system account for category-specific deficits?

It is argued that the sensory-functional theory of category-specific effects is insufficient to account for the current neuroimaging literature, and the data do support a more refined version of the theory: tools, relative to fruit, are more strongly linked to manipulative/motor knowledge and fruit may be more reliant on integrating multiple semantic features.
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Testing a Computational Account of Category-Specific Deficits

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  • Psychology
    Journal of Cognitive Neuroscience
  • 1999
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