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  • Title: Evidence for a dissociation between perceptual and conceptual priming in Alzheimer's disease.
    Author: Keane MM, Gabrieli JD, Fennema AC, Growdon JH, Corkin S.
    Journal: Behav Neurosci; 1991 Apr; 105(2):326-42. PubMed ID: 2043276.
    Abstract:
    The status of perceptual priming and word-completion priming in patients with Alzheimer's disease (AD) was examined. Experiment 1 established the reliability of the perceptual priming measure in normal subjects. In Experiment 2, AD patients showed a normal magnitude of perceptual priming. In Experiment 3, a single group of AD patients showed a normal magnitude of perceptual priming and impaired word-completion priming. Further, word-completion priming, but not perceptual priming, was correlated with verbal fluency performance in AD. These results suggest a dissociation between two components of verbal priming. Perceptual priming may reflect the operation of a structural-perceptual memory system mediated by occipital lobe regions relatively spared in AD. Word-completion priming may reflect the operation of a lexical-semantic memory system mediated by temporoparietal lobe regions compromised in AD.
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