The Precuneus and Visuospatial Attention in Near and far Space: A Transcranial Magnetic Stimulation Study

Mahayana, Indra Tri; Tcheang, Lili; Chen, Chiao Yun; Juan, Chi Hung; Muggleton, Neil G.

doi:10.1016/j.brs.2014.06.012

Cited by 64 publications

(30 citation statements)

References 57 publications

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“…Note also that there was no effect on performance after rTMS over the right precuneus if targets were presented unilaterally. One could suggest that bilateral presentation induce competition for representation which is augmented after TMS over the right precuneus similar to the phenomenon of extinction [36,37].…”

Section: Discussionmentioning

confidence: 95%

“…How visual space is represented in the precuneus was not well understood. However, a recent TMS study provided evidence for a neglect-like effect (rightward spatial bias) for near space judgments [37] after rTMS over the right precuneus, thus underpinning the role of the right precuneus in visuospatial functions. To examine the role of the precuneus in VSTM processes for items presented within and across the visual hemifields we combine rTMS with a whole report task ( [18,21]) and analysis in terms of TVA [24].…”

Section: Introductionmentioning

confidence: 96%

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TMS Over the Right Precuneus Reduces the Bilateral Field Advantage in Visual Short Term Memory Capacity

et al. 2015

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Section: Discussionmentioning

confidence: 95%

Section: Introductionmentioning

confidence: 96%

TMS Over the Right Precuneus Reduces the Bilateral Field Advantage in Visual Short Term Memory Capacity

et al. 2015

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“…According to the functional dissociation previously attributed to the two streams, results of the study revealed a double dissociation: rPPC was involved only in processing of near space, while rVO was necessary for the task in the far space. Moreover, very recently Mahayana et al [26] showed that also medial part of PPC, the precuneus, is involved in the near space, thus confirming the anatomical segregation of near and far space networks.…”

Section: Introductionmentioning

confidence: 80%

Far Space Remapping by Tool Use: A rTMS Study Over the Right Posterior Parietal Cortex

Giglia¹,

Pia²,

Folegatti³

et al. 2015

Brain Stimulation

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“…Functionally, the precuneus has been shown to demonstrate a hemispheric specialization with visuomotor tasks. The right precuneus is attributed to stimulus encoding and visuospatial transformations necessary for eye-hand coordinated movements [42, 44, 45], while left precuneus activation appears to be involved with praxis planning and encoding of future intentions [46–48]. The enhanced left precuneus activation observed for EXP subjects provides evidence for an attentional resource shift to include the left parietal region.…”

Section: Discussionmentioning

confidence: 99%

Novel behavioral indicator of explicit awareness reveals temporal course of frontoparietal neural network facilitation during motor learning

2017

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Deficits in sequential motor learning have been observed in many patient populations. Having an understanding of the individual neural progression associated with sequential learning in healthy individuals may provide valuable insights for effective interventions with these patients. Due to individual variability in motor skill acquisition, the temporal course of such learning will be vary, suggesting a need for a more individualized approach. Knowing when a subject becomes aware of movement patterns may provide a marker with which to identify each individual’s learning time course. To avoid interfering with the incidental nature of discovery during learning, such an indicator requires an indirect, behaviorally-based approach. In Part I, our study aimed to identify a reliable behavioral indicator predictive of the presence of incidental explicit awareness in a sequential motor learning task. Part II, utilized the predictive indicator and EEG to provide neural validation of perceptual processing changes temporally correlated with the indicator. Results of Part I provide a reliable predictive indicator for the timing of explicit awareness development. Results from Part II demonstrates strong classification reliability, as well as a significant neural correlation with behavior for subjects developing awareness (EXP), not observed with subjects without awareness (NOEXP). Additionally, a temporal correlation of peak activation between neural regions was noted over frontoparietal regions, suggesting that the incidental discovery of motor patterns may involve a facilitative network during awareness development. The proposed indicator provides a tool in which to further examine potential impacts of awareness associated with incidental, or exploratory, motor learning, while the individual nature of the indicator provides a tool for monitoring progress in rehabilitative, exploratory motor learning paradigms.

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The Precuneus and Visuospatial Attention in Near and far Space: A Transcranial Magnetic Stimulation Study

Cited by 64 publications

References 57 publications

TMS Over the Right Precuneus Reduces the Bilateral Field Advantage in Visual Short Term Memory Capacity

TMS Over the Right Precuneus Reduces the Bilateral Field Advantage in Visual Short Term Memory Capacity

Far Space Remapping by Tool Use: A rTMS Study Over the Right Posterior Parietal Cortex

Novel behavioral indicator of explicit awareness reveals temporal course of frontoparietal neural network facilitation during motor learning

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