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000136201 1001_ $$0P:(DE-Juel1)VDB834$$aKrause, B. J.$$b0
000136201 245__ $$aNetwork analysis in episodic encoding and retrieval of word-pair associates: a PET study
000136201 260__ $$bWiley-Blackwell
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DOI: 10.1046/j.1460-9568.1999.00723.x
000136201 520__ $$aThe involvement of distributed brain regions in declarative memory has been hypothesized based on studies with verbal memory tasks. To characterize episodic declarative memory function further, 14 right-handed volunteers performed a visual verbal learning task using paired word associates. The volunteers underwent positron emission tomography. 15O-butanol was used as a tracer of regional cerebral blood flow (rCBF). Inter-regional functional interactions were assessed based on within-task, across-subject interregional
rCBF correlations. Anatomical connections between brain areas were based on known anatomy. Structural equation modelling was used to calculate the path coefficients representing the magnitudes of the functional influences of each area on the
ones to which it is connected by anatomical pathways. The encoding and the retrieval network elicit similarities in a general manner but also differences. Strong functional linkages involving visual integration areas, parahippocampal regions, left precuneus and cingulate gyrus were found in both encoding and retrieval; the functional linkages between posterior regions and prefrontal regions were more closely linked during encoding, whereas functional linkages between the left parahippocampal region and posterior
cingulate as well as extrastriate areas and posterior cingulate gyrus were stronger during retrieval. In conclusion, these findings support the idea of a global bihemispheric, asymmetric encoding/retrieval network subserving episodic declarative memory. Our results further underline the role of the precuneus in episodic memory, not only during retrieval but also during encoding.
000136201 650_7 $$aepisodic memory
000136201 650_7 $$anetwork analysis
000136201 650_7 $$apaired word associates
000136201 650_7 $$apositron emission tomography
000136201 650_7 $$astructural equation modelling
000136201 7001_ $$aHorwitz, B.$$b1
000136201 7001_ $$aTaylor, J. G.$$b2
000136201 7001_ $$aSchmidt, D.$$b3
000136201 7001_ $$aMottaghy, F. M.$$b4
000136201 7001_ $$aHerzog, H.$$b5
000136201 7001_ $$0P:(DE-Juel1)VDB3937$$aHalsband, U.$$b6
000136201 7001_ $$aMüller-Gärtner, H. -W.$$b7
000136201 773__ $$0PERI:(DE-600)2005178-5$$p3293 - 3301$$tEuropean journal of neuroscience$$v11$$y1999
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