scholarly journals The anodal tDCS over the left posterior parietal cortex enhances attention toward a focus word in a sentence

2014 ◽  
Vol 8 ◽  
Author(s):  
Takehiro Minamoto ◽  
Miyuki Azuma ◽  
Ken Yaoi ◽  
Aoi Ashizuka ◽  
Tastuya Mima ◽  
...  
Keyword(s):  
Parietal Cortex ◽  
Posterior Parietal Cortex ◽  
Anodal Tdcs ◽  
Left Posterior ◽  
Posterior Parietal

scholarly journals TMS-Adaptation Reveals Abstract Letter Selectivity in the Left Posterior Parietal Cortex

2009 ◽  
Vol 19 (10) ◽  
pp. 2321-2325 ◽  
Author(s):  
Z. Cattaneo ◽  
F. Rota ◽  
V. Walsh ◽  
T. Vecchi ◽  
J. Silvanto
Keyword(s):  
Parietal Cortex ◽  
Posterior Parietal Cortex ◽  
Left Posterior ◽  
Posterior Parietal

scholarly journals Working Memory Retrieval: Contributions of the Left Prefrontal Cortex, the Left Posterior Parietal Cortex, and the Hippocampus

2009 ◽  
Vol 21 (3) ◽  
pp. 581-593 ◽  
Author(s):  
Ilke Öztekin ◽  
Brian McElree ◽  
Bernhard P. Staresina ◽  
Lila Davachi
Keyword(s):  
Working Memory ◽  
Parietal Cortex ◽  
Posterior Parietal Cortex ◽  
Inferior Frontal Gyrus ◽  
Long Term Memory ◽  
Term Memory ◽  
Focal Attention ◽  
Left Posterior ◽  
Posterior Parietal

Functional magnetic resonance imaging was used to identify regions involved in working memory (WM) retrieval. Neural activation was examined in two WM tasks: an item recognition task, which can be mediated by a direct-access retrieval process, and a judgment of recency task that requires a serial search. Dissociations were found in the activation patterns in the hippocampus and in the left inferior frontal gyrus (LIFG) when the probe contained the most recently studied serial position (where a test probe can be matched to the contents of focal attention) compared to when it contained all other positions (where retrieval is required). The data implicate the hippocampus and the LIFG in retrieval from WM, complementing their established role in long-term memory. Results further suggest that the left posterior parietal cortex (LPPC) supports serial retrieval processes that are often required to recover temporal order information. Together, these data suggest that the LPPC, the LIFG, and the hippocampus collectively support WM retrieval. Critically, the reported findings support accounts that posit a distinction between representations maintained in and outside of focal attention, but are at odds with traditional dual-store models that assume distinct mechanisms for short- and long-term memory representations.

scholarly journals Reflexive and Preparatory Selection and Suppression of Salient Information in the Right and Left Posterior Parietal Cortex

2009 ◽  
Vol 21 (6) ◽  
pp. 1204-1214 ◽  
Author(s):  
Carmel Mevorach ◽  
Glyn W. Humphreys ◽  
Lilach Shalev
Keyword(s):  
Parietal Cortex ◽  
Posterior Parietal Cortex ◽  
Left Posterior ◽  
Preparatory Phase ◽  
Trigger Activity ◽  
On Line ◽  
Posterior Parietal ◽  
The Right ◽  
Two Sides ◽  
Selection Of

Attentional cues can trigger activity in the parietal cortex in anticipation of visual displays, and this activity may, in turn, induce changes in other areas of the visual cortex, hence, implementing attentional selection. In a recent TMS study [Mevorach, C., Humphreys, G. W., & Shalev, L. Opposite biases in salience-based selection for the left and right posterior parietal cortex. Nature Neuroscience, 9, 740–742, 2006b], it was shown that the posterior parietal cortex (PPC) can utilize the relative saliency (a nonspatial property) of a target and a distractor to bias visual selection. Furthermore, selection was lateralized so that the right PPC is engaged when salient information must be selected and the left PPC when the salient information must be ignored. However, it is not clear how the PPC implements these complementary forms of selection. Here we used on-line triple-pulse TMS over the right or left PPC prior to or after the onset of global/local displays. When delivered after the onset of the display, TMS to the right PPC disrupted the selection of the more salient aspect of the hierarchical letter. In contrast, left PPC TMS delivered prior to the onset of the stimulus disrupted responses to the lower saliency stimulus. These findings suggest that selection and suppression of saliency, rather than being “two sides of the same coin,” are fundamentally different processes. Selection of saliency seems to operate reflexively, whereas suppression of saliency relies on a preparatory phase that “sets up” the system in order to effectively ignore saliency.

scholarly journals Theta-modulated oscillatory transcranial direct current stimulation over posterior parietal cortex improves associative memory

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Katarina Vulić ◽  
Jovana Bjekić ◽  
Dunja Paunović ◽  
Miloš Jovanović ◽  
Slađan Milanović ◽  
...  
Keyword(s):  
Associative Memory ◽  
Parietal Cortex ◽  
Direct Current ◽  
Transcranial Direct Current Stimulation ◽  
Posterior Parietal Cortex ◽  
Cued Recall ◽  
Anodal Tdcs ◽  
Direct Current Stimulation ◽  
Natural Function ◽  
Posterior Parietal

AbstractAssociative memory (AM) reflects the ability to remember and retrieve multiple pieces of information bound together thus enabling complex episodic experiences. Despite growing interest in the use of transcranial direct current stimulation (tDCS) for the modulation of AM, there are inconsistent evidence regarding its benefits. An alternative to standard constant tDCS could be the application of frequency-modulated tDCS protocols, that mimic natural function-relevant brain rhythms. Here, we show the effects of anodal tDCS oscillating in theta rhythm (5 Hz; 1.5 ± 0.1 mA) versus constant anodal tDCS and sham over left posterior parietal cortex on cued recall of face-word associations. In a crossover design, each participant completed AM assessment immediately following 20-min theta-oscillatory, constant, and sham tDCS, as well as 1 and 5 days after. Theta oscillatory tDCS increased initial AM performance in comparison to sham, and so did constant tDCS. On the group level, no differences between oscillatory and constant tDCS were observed, but individual-level analysis revealed that some participants responded to theta-oscillatory but not to constant tDCS, and vice versa, which could be attributed to their different physiological modes of action. This study shows the potential of oscillatory tDCS protocols for memory enhancement to produce strong and reliable memory-modulating effects which deserve to be investigated further.

scholarly journals 1Hz rTMS of the left posterior parietal cortex (PPC) modifies sensorimotor timing

2012 ◽  
Vol 50 (14) ◽  
pp. 3729-3735 ◽  
Author(s):  
Vanessa Krause ◽  
Shahid Bashir ◽  
Bettina Pollok ◽  
Anuhya Caipa ◽  
Alfons Schnitzler ◽  
...  
Keyword(s):  
Parietal Cortex ◽  
Posterior Parietal Cortex ◽  
Left Posterior ◽  
Posterior Parietal
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