2008
DOI: 10.1016/j.neuroimage.2007.12.037
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Differential activation of frontal and parietal regions during visual word recognition: An optical topography study

Abstract: The present study examined cortical oxygenation changes during lexical decision on words and pseudowords using functional NearInfrared Spectroscopy (fNIRS). Focal hyperoxygenation as an indicator of functional activation was compared over three target areas over the left hemisphere. A 52-channel Hitachi ETG-4000 was used covering the superior frontal gyrus (SFG), the left inferior parietal gyrus (IPG) and the left inferior frontal gyrus (IFG). To allow for anatomical inference a recently developed probabilisti… Show more

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Cited by 50 publications
(57 citation statements)
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“…To allow for anatomic inference of the channel positions, we applied a virtual optode registration technique (Tzuzuki et al, 2007), which was documented in Hofmann et al (2008).…”
Section: Discussionmentioning
confidence: 99%
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“…To allow for anatomic inference of the channel positions, we applied a virtual optode registration technique (Tzuzuki et al, 2007), which was documented in Hofmann et al (2008).…”
Section: Discussionmentioning
confidence: 99%
“…For example, response times can be more than 100 ms slower for low-than for high-frequency words (Hofmann et al, 2008). Moreover, low-frequency words display a greater ERP-amplitude within 200 ms after stimulus exposure (Dambacher et al, 2006;Hauk & Pulvermüller, 2004).…”
Section: Orbitofrontal Interaction Of Word Frequency and Predictabilitymentioning
confidence: 99%
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“…This transformation of the data (y) and model (h) using an AR(1) model of the residual error terms is the Cochrane-Orcutt method [15], which has been used in several studies [16][17][18] to remove serial correlations in fNIRS analysis. This method can easily be generalized to any AR model order [19] as follows:…”
Section: Theorymentioning
confidence: 99%
“…For example, context has been described as information that fluctuates randomly over time with respect to different item presentations [29][30][31] which might be referred to as temporal context [32]. Context has also been defined as the physical environment in which an item occurs [33][34][35]. Howard and Kahana (2002) described the context associated with a given item as a composite representation of the semantic features of the items that preceded it on a list [36].…”
Section: Introductionmentioning
confidence: 99%