PMID: 9539233Apr 16, 1998Paper

Networks of domain-specific and general regions involved in episodic memory for spatial location and object identity

Neuropsychologia
S KöhlerA R McIntosh

Abstract

Positron emission tomography (PET) was used to investigate human episodic memory for spatial location and object identity. We measured regional cerebral bloodflow (rCBF) while subjects engaged in perceptual matching of the location or the identity of line drawings of objects. Perceptual matching also involved incidental encoding of the presented information. Subsequently, rCBF was measured when subjects retrieved the location or the identity of these objects from memory. Using the multivariate partial least squares image analysis, we identified three patterns of activity across the brain that allowed us to distinguish structures that are differentially involved in processing spatial location and object identity from structures that are differentially involved in encoding and retrieval but operate across both domains. Domain-specificity was evident by increased rCBF during the processing of spatial location in the right middle occipital gyrus, supramarginal gyrus, and superior temporal sulcus, and by increased rCBF during the processing of object identity in portions of bilateral lingual and fusiform gyri. There was a nearly complete overlap between domain-specific dorsal and ventral extrastriate cortex activations during percep...Continue Reading

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