Task demand modulations of visuospatial processing measured with functional magnetic resonance imaging

Vannini, Patrizia; Almkvist, Ove; Franck, Anders; Jönsson, Tomas; Volpe, Umberto; Wiberg, Maria Kristoffersen; Wahlund, Lars Olof; Dierks, Thomas

doi:10.1016/j.neuroimage.2003.09.033

Cited by 35 publications

(20 citation statements)

References 25 publications

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“…In addition, there is a large body of evidence relating areas in the SPL to visuospatial processing using PET (Haxby et al 1991;Ungerleider and Haxby 1994;Mellet et al 1996), fMRI (Cohen et al 1996;Tagaris et al 1996;Goebel et al 1998;Carpenter et al 1999;Trojano et al 2000;Ng et al 2001;Formisano et al 2002;Trojano et al 2002;Vannini et al 2004;Schicke et al 2006), and TMS (Sack, Hubl, et al 2002;Sack, Sperling, et al 2002;Blanke Cerebral Cortex December 2007, V 17 N 12 2847Kim et al 2005;Koch et al 2005;Go¨bel et al 2006). It is possible that the spatial functions represented in the right parietal network we find are also used for visuomotor transformations and attentional control.…”

Section: Discussionmentioning

confidence: 99%

“…Before the actual fMRI experiments, participants practiced several trials of both tasks until their behavioral responses reached a stable plateau. Previous work using the identical behavioral paradigm has shown bilateral parietal activity during the execution of the ANGLE task (Sack, Hubl, et al 2002;Vannini et al 2004), with significant behavioral impairments occurring after a disruption of the right parietal cortex (Sack, Sperling, et al 2002).…”

Section: Cognitive Tasksmentioning

confidence: 95%

“…Previous functional brain imaging results suggest a direct positive relationship between increased cognitive demand, as reflected in visuospatial task difficulty, and underlying parietal activity (Tagaris et al 1996;Carpenter et al 1999;Ng et al 2001;Vannini et al 2004).…”

Section: Introductionmentioning

confidence: 95%

“…The technique of transcranial magnetic stimulation (TMS) is a well-established tool for inducing transient disruptions of neural activity (''virtual lesions'') noninvasively in human volunteers (Hallett 2000;Pascual-Leone et al 2000;Walsh and Cowey 2000;George et al 2002;Sack 2006). Accordingly, TMS studies have established the relevance of parietal cortices in visuospatial processing (Cohen et al 1996;Topper et al 1998;Rushworth et al 2003;Vannini et al 2004;Kim et al 2005;Koch et al 2005;Go¨bel et al 2006), visuospatial attention (Hilgetag et al 2001;Stewart, Ellison, et al 2001;Mu¨ri et al 2002;Chambers et al 2004;Hung et al 2005;Mevorach et al 2005;Thut et al 2005;Dambeck et al 2006), visuomotor mental rotation (Bestmann et al 2002), and visuomotor integration (Rushworth et al 2001).…”

Section: Introductionmentioning

confidence: 99%

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Imaging the Brain Activity Changes Underlying Impaired Visuospatial Judgments: Simultaneous fMRI, TMS, and Behavioral Studies

et al. 2007

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Damage to parietal cortex impairs visuospatial judgments. However, it is currently unknown how this damage may affect or indeed be caused by functional changes in remote but interconnected brain regions. Here, we applied transcranial magnetic stimulation (TMS) to the parietal cortices during functional magnetic resonance imaging (fMRI) while participants were solving visuospatial tasks. This allowed us to observe both the behavioral and the neural effects of transient parietal activity disruption in the active healthy human brain. Our results show that right, but not left, parietal TMS impairs visuospatial judgment, induces neural activity changes in a specific right-hemispheric network of frontoparietal regions, and shows significant correlations between the induced behavioral impairment and neural activity changes in both the directly stimulated parietal and remote ipsilateral frontal brain regions. The revealed righthemispheric neural network effect of parietal TMS represents the same brain areas that are functionally connected during the execution of visuospatial judgments. This corroborates the notion that visuospatial deficits following parietal damage are brought about by a perturbation of activity across a specific frontoparietal network, rather than the lesioned parietal site alone. Our experiments furthermore show how concurrent fMRI and magnetic brain stimulation during active task execution hold the potential to identify and visualize networks of brain areas that are functionally related to specific cognitive processes.

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Section: Discussionmentioning

confidence: 99%

Section: Cognitive Tasksmentioning

confidence: 95%

Section: Introductionmentioning

confidence: 95%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Imaging the Brain Activity Changes Underlying Impaired Visuospatial Judgments: Simultaneous fMRI, TMS, and Behavioral Studies

et al. 2007

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“…Moreover, there is evidence that parietal lobe (PL) activation may correlate with subject performance (Todd and Marois, 2005;Walter and Dassonville, 2011). Finally, there is evidence suggesting a relationship between spatial cognition, performance and parietal activation (Carpenter, et al, 1999;Ng, et al, 2001;Tagaris, et al, 1996, Vannini, et al, 2004). …”

Section: Introductionmentioning

confidence: 99%

The role of the posterior parietal cortex in stereopsis and hand-eye coordination during motor task behaviours

et al. 2014

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When some is not every: Dissociating scalar implicature generation and mismatch

Shetreet

Chierchia

Gaab

2013

Human Brain Mapping

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Making inferences beyond the literal meaning of sentences occurs with certain scalar expressions via scalar implicatures. For example, adults usually interpret some as some but not all. On the basis of behavioral research, it has been suggested that processing implicatures is cognitively costly. However, many studies have used cases where sentences with some did not match the context in which they were presented. Our study aimed to examine whether the processing cost is linked to implicature generation, to the mismatch between the implicature and the context, or to both processes. To do so, we explored the neural patterns of implicature generation and implicature mismatch using fMRI. Thirteen participants performed a sentence-picture matching task (where pictures determined the context) with mismatched implicatures, successful implicatures or no implicature conditions. Several brain regions were identified when comparing cases of implicature mismatch and cases without implicatures. One of these regions, left-IFG, was jointly activated for mismatched and successful implicatures, as observed in a conjunction analysis. By contrast, left-MFG and medial-frontal-gyrus, were identified when comparing cases of implicature mismatch with cases of successful implicatures. Thus, the left IFG can be interpreted as being linked to implicature generation, whereas the other two areas seem to participate in the processing of the mismatch between the implicature and its context. Our results indicate that scalar implicatures induce processing cost in different ways. This should be considered in future research.

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Task demand modulations of visuospatial processing measured with functional magnetic resonance imaging

Cited by 35 publications

References 25 publications

Imaging the Brain Activity Changes Underlying Impaired Visuospatial Judgments: Simultaneous fMRI, TMS, and Behavioral Studies

Imaging the Brain Activity Changes Underlying Impaired Visuospatial Judgments: Simultaneous fMRI, TMS, and Behavioral Studies

The role of the posterior parietal cortex in stereopsis and hand-eye coordination during motor task behaviours

When some is not every: Dissociating scalar implicature generation and mismatch

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