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Titolo:
Mental imagery of high- and low-resolution gratings activates Area 17
Autore:
Thompson, WL; Kosslyn, SM; Sukel, KE; Alpert, NM;
Indirizzi:
Harvard Univ, Dept Psychol, Cambridge, MA 02138 USA Harvard Univ Cambridge MA USA 02138 Dept Psychol, Cambridge, MA 02138 USA Massachusetts Gen Hosp, Dept Neurol, Boston, MA 02114 USA Massachusetts Gen Hosp Boston MA USA 02114 t Neurol, Boston, MA 02114 USA Massachusetts Gen Hosp, Dept Radiol, Boston, MA 02114 USA Massachusetts Gen Hosp Boston MA USA 02114 t Radiol, Boston, MA 02114 USA
Titolo Testata:
NEUROIMAGE
fascicolo: 2, volume: 14, anno: 2001,
pagine: 454 - 464
SICI:
1053-8119(200108)14:2<454:MIOHAL>2.0.ZU;2-O
Fonte:
ISI
Lingua:
ENG
Soggetto:
POSITRON-EMISSION-TOMOGRAPHY; PRIMARY VISUAL-CORTEX; CEREBRAL BLOOD-FLOW; FUNCTIONAL-ANATOMY; STRIATE CORTEX; MACAQUE MONKEY; MINDS EYE; PET; DISSOCIATION; CEREBELLUM;
Keywords:
Area 17; V1; activation; PET; gratings; resolution; mental imagery; neuroimaging;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
51
Recensione:
Indirizzi per estratti:
Indirizzo: Thompson, WL Harvard Univ, Dept Psychol, 33 Kirkland St, Cambridge, MA 02138 USA Harvard Univ 33 Kirkland St Cambridge MA USA 02138 02138 USA
Citazione:
W.L. Thompson et al., "Mental imagery of high- and low-resolution gratings activates Area 17", NEUROIMAGE, 14(2), 2001, pp. 454-464

Abstract

Some, but not all, previous neuroimaging studies of visual mental imagery have found that Area 17 (primary visual cortex) is activated when people visualize objects. The present study was designed to test the hypothesis thatthe necessary degree of resolution of the mental image is a determining factor in whether Area 17 is activated during imagery. Eight male subjects visualized and compared sets of stripes that required high or low resolution to resolve, while their brains were scanned using O-15(CO2) positron emission tomography (PET). When imagery in general (visualization of high- and low-resolution gratings stimuli combined) was compared to an auditory baseline condition where subjects did not visualize, Area 17 was activated. However, region of interest (ROI) and statistical parametric mapping (SPM) analyses revealed no difference between imagery conditions using high- and low-resolution stimuli. These results indicate that the resolution of the stimulialone does not necessarily determine whether Area 17 will be activated during visual mental imagery. (R) 2001 Academic Press.

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Documento generato il 27/01/20 alle ore 13:55:34