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Where do you know what you know? The representation of semantic knowledge in the human brain
Mr M, a patient with semantic dementia — a neurodegenerative disease that is characterized by the gradual deterioration of semantic memory — was being driven through the countryside to visit a friend…
The neural and computational bases of semantic cognition
- M. L. Ralph, E. Jefferies, K. Patterson, T. Rogers
- Psychology, Computer ScienceNature Reviews Neuroscience
This Review summarizes key findings and issues arising from a decade of research into the neurocognitive and neurocomputational underpinnings of semantic cognition, leading to a new framework that is term controlled semantic cognition (CSC).
Structure and deterioration of semantic memory: a neuropsychological and computational investigation.
The authors present a parallel distributed processing implementation of this theory, in which semantic representations emerge from mechanisms that acquire the mappings between visual representations of objects and their verbal descriptions, to understand the structure of impaired performance in patients with selective and progressive impairments of conceptual knowledge.
Semantic Cognition: A Parallel Distributed Processing Approach
The authors propose that performance in semantic tasks arises through the propagation of graded signals in a system of interconnected processing units, and show how a simple computational model proposed by Rumelhart exhibits a progressive differentiation of conceptual knowledge, paralleling aspects of cognitive development seen in the work of Frank Keil and Jean Mandler.
Anterior temporal cortex and semantic memory: Reconciling findings from neuropsychology and functional imaging
- T. Rogers, J. Hocking, C. Price
- Psychology, BiologyCognitive, Affective, & Behavioral Neuroscience
- 1 September 2006
Neuropsychological and PE T functional imaging data are combined to show that when healthy subjects identify concepts at a specific level, the regions activated correspond to the site of maximal atrophy in patients with relatively pure semantic impairment.
Neural representations of events arise from temporal community structure
- A. Schapiro, T. Rogers, N. Córdova, N. Turk-Browne, M. Botvinick
- PsychologyNature Neuroscience
- 1 April 2013
A computational account of how the relevant representations might arise is presented, proposing a direct connection between event learning and the learning of semantic categories.
The parallel distributed processing approach to semantic cognition
Simulation models capture semantic cognitive processes and their development and disintegration, encompassing domain-specific patterns of generalization in young children, and the restructuring of conceptual knowledge as a function of experience.
Lichtheim 2: Synthesizing Aphasia and the Neural Basis of Language in a Neurocomputational Model of the Dual Dorsal-Ventral Language Pathways
Neural basis of category-specific semantic deficits for living things: evidence from semantic dementia, HSVE and a neural network model.
- M. L. Lambon Ralph, C. Lowe, T. Rogers
- Psychology, BiologyBrain : a journal of neurology
- 21 November 2006
Using a combination of neuropsychology and computational neuroscience, the possibility that category-specific deficits for living things depend not solely upon the location of damage within the cortical semantic network but also critically upon the type of impairment is tested.
Object categorization: reversals and explanations of the basic-level advantage.
It is predicted that if healthy individuals are encouraged to make rapid categorization responses, the usual basic > general advantage should also reverse, a prediction tested and confirmed in Experiment 3 and implications for theories of visual object recognition are discussed.