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Titolo:
Functional MRI with reduced susceptibility artifact: high-resolution mapping of episodic memory encoding
Autore:
Fransson, P; Merboldt, KD; Ingvar, M; Petersson, KM; Frahm, J;
Indirizzi:
Max Planck Inst Biophys Chem, Biomed NMR Forsch GmbH, D-37070 Gottingen, Germany Max Planck Inst Biophys Chem Gottingen Germany D-37070 ottingen, Germany Karolinska Inst, Karolinska Hosp, MR Res Ctr, S-10401 Stockholm, Sweden Karolinska Inst Stockholm Sweden S-10401 Ctr, S-10401 Stockholm, Sweden Karolinska Inst, Karolinska Hosp, Dept Clin Neurosci, S-10401 Stockholm, Sweden Karolinska Inst Stockholm Sweden S-10401 osci, S-10401 Stockholm, Sweden
Titolo Testata:
NEUROREPORT
fascicolo: 7, volume: 12, anno: 2001,
pagine: 1415 - 1420
SICI:
0959-4965(20010525)12:7<1415:FMWRSA>2.0.ZU;2-U
Fonte:
ISI
Lingua:
ENG
Soggetto:
MEDIAL TEMPORAL-LOBE; BRAIN ACTIVITY; HIPPOCAMPUS; ACTIVATION; RETRIEVAL; PET; EXPERIENCE;
Keywords:
hippocampus; human brain; magnetic resonance imaging; memory; neuroimaging; parahippocampus;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
26
Recensione:
Indirizzi per estratti:
Indirizzo: Frahm, J Max Planck Inst Biophys Chem, Biomed NMR Forsch GmbH, D-37070 Gottingen, Germany Max Planck Inst Biophys Chem Gottingen Germany D-37070 Germany
Citazione:
P. Fransson et al., "Functional MRI with reduced susceptibility artifact: high-resolution mapping of episodic memory encoding", NEUROREPORT, 12(7), 2001, pp. 1415-1420

Abstract

Visual episodic memory encoding was investigated using echo-planar magnetic resonance imaging at 2.0 x 2.0 mm(2) resolution and 1.0 mm section thickness, which allows for functional mapping of hippocampal, parahippocampal, and ventral occipital regions with reduced magnetic susceptibility artifact. The memory task was based on 54 image pairs each consisting of a complex visual scene and the face of one of six different photographers. A second group of subjects viewed the same set of images without memory instruction aswell as a reversing checkerboard. Apart from visual activation in occipital cortical areas, episodic memory encoding revealed consistent activation in the, parahippocampal gyrus but not in the hippocampus;proper. This finding was most prominently evidenced in sagittal maps covering the right hippocampal formation. Mean activated volumes were 432+/-293 mul and 259+/-179 mul for intentional memory encoding and non-instructed viewing, respectively. In contrast, the checkerboard paradigm elicited pure visual activation without parahippocampal involvement. NeuroReport 12:1415-1420 (C) 2001 Lippincott Williams & Wilkins.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 20/01/20 alle ore 10:18:08