Cytoarchitectonic mapping of attentional selection and reorienting in parietal cortex

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• 作者：Cé ; line R. Gillebert^a ; Dante Mantini^b ; Ronald Peeters^c ; Patrick Dupont^a ; Rik Vandenberghe^a ; ^d ; ^{rik.vandenberghe@uz.kuleuven.ac.be}
• 关键词：ANOVA ; analysis-of-variance ; DTI ; diffusion tensor imaging ; EPI ; echoplanar images ; fMRI ; functional magnetic resonance imaging ; FWHM ; full-width at half-maximum ; G&ndash ; G ; Greenhouse&ndash ; Geisser ; GLM ; general linear model ; IPL ; inferior parietal lobul
• 刊名：NeuroImage
• 出版年：2013
• 出版时间：15 February, 2013
• 年：2013
• 卷：67
• 期：Complete
• 页码：257-272
• 全文大小：2716 K

文摘

Selection and reorienting are two fundamental aspects of spatial attention. By means of event-related fMRI in a total of 26 subjects, we localized these two processes within a same experiment applying a probabilistic cytoarchitectonic reference frame. In a classical spatial cueing paradigm, the target was presented at the cued location either alone (60 % of trials) or in combination with a contralateral distracter (¡®competition trials¡¯, 20 % of trials), or at a location opposite to the cued location (¡®invalidly cued trials¡¯, 20 % of trials). In a sensory control experiment we differentiated between the attentional and the sensory effects of the distracter. In areas hIP1 and hIP3, competition trials exerted a significantly stronger attentional effect than invalidity trials. Conversely, area PF in the right hemisphere showed an invalidity effect in the absence of competition effect. A third type of response was found in areas PFm and PGa which showed both an invalidity and a competition effect. The combined study of selection and reorienting using a cytoarchitectonic reference frame enabled us to resolve the wide between-study variance in temporoparietal coordinates associated with the invalidity effect. Furthermore, the study demonstrated within a same experiment a functional dissociation between reorienting and selection in parietal cortex.