scholarly journals Disruption of right posterior parietal cortex by continuous Theta Burst Stimulation alters the control of body balance in quiet stance

2017 ◽  
Vol 45 (5) ◽  
pp. 671-678 ◽  
Author(s):  
David Kaulmann ◽  
Joachim Hermsdörfer ◽  
Leif Johannsen
Keyword(s):  
Parietal Cortex ◽  
Posterior Parietal Cortex ◽  
Quiet Stance ◽  
Theta Burst Stimulation ◽  
Burst Stimulation ◽  
Body Balance ◽  
Posterior Parietal ◽  
Theta Burst ◽  
Continuous Theta Burst Stimulation

Effects of High-Definition Transcranial Direct Current Stimulation and Theta Burst Stimulation for Modulating the Posterior Parietal Cortex

2019 ◽  
Vol 25 (09) ◽  
pp. 972-984
Author(s):  
Tian Gan ◽  
Stevan Nikolin ◽  
Colleen K. Loo ◽  
Donel M. Martin
Keyword(s):  
Working Memory ◽  
Parietal Cortex ◽  
Direct Current ◽  
Posterior Parietal Cortex ◽  
Theta Burst Stimulation ◽  
Burst Stimulation ◽  
High Definition ◽  
Attention Task ◽  
Posterior Parietal ◽  
Theta Burst

AbstractObjectives:Noninvasive brain stimulation methods, including high-definition transcranial direct current stimulation (HD-tDCS) and theta burst stimulation (TBS) have emerged as novel tools to modulate and explore brain function. However, the relative efficacy of these newer stimulation approaches for modulating cognitive functioning remains unclear. This study investigated the cognitive effects of HD-tDCS, intermittent TBS (iTBS) and prolonged continuous TBS (ProcTBS) and explored the potential of these approaches for modulating hypothesized functions of the left posterior parietal cortex (PPC).Methods:Twenty-two healthy volunteers attended four experimental sessions in a cross-over experimental design. In each session, participants either received HD-tDCS, iTBS, ProcTBS or sham, and completed cognitive tasks, including a divided attention task, a working memory maintenance task and an attention task (emotional Stroop test).Results:The results showed that compared to sham, HD-tDCS, iTBS and ProcTBS caused significantly faster response times on the emotional Stroop task. The effect size (Cohen’sd) wasd= .32 for iTBS (p< .001), .21 for ProcTBS (p= .01) and .15 for HD-tDCS (p= .044). However, for the performance on the divided attention and working memory maintenance tasks, no significant effect of stimulation was found.Conclusions:The results suggest that repetitive transcranial magnetic stimulation techniques, including TBS, may have greater efficacy for modulating cognition compared with HD-tDCS, and extend existing knowledge about specific functions of the left PPC.

P2. Theta burst stimulation over left posterior parietal cortex interferes with imitation of gestures

2012 ◽  
Vol 123 (10) ◽  
pp. e101-e102
Author(s):  
Tim Vanbellingen ◽  
Manuel Bertschi ◽  
Thomas Nyffeler ◽  
Dario Cazzoli ◽  
Roland Wiest ◽  
...  
Keyword(s):  
Parietal Cortex ◽  
Posterior Parietal Cortex ◽  
Theta Burst Stimulation ◽  
Burst Stimulation ◽  
Left Posterior ◽  
Posterior Parietal ◽  
Theta Burst

scholarly journals Behavioral effects of continuous theta-burst stimulation in macaque parietal cortex

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Lara Merken ◽  
Marco Davare ◽  
Peter Janssen ◽  
Maria C. Romero
Keyword(s):  
Parietal Cortex ◽  
High Intensity ◽  
Theta Burst Stimulation ◽  
Burst Stimulation ◽  
Primate Model ◽  
Power Grip ◽  
Fitts Law ◽  
Behavioral Evidence ◽  
Theta Burst ◽  
Continuous Theta Burst Stimulation

AbstractThe neural mechanisms underlying the effects of continuous Theta-Burst Stimulation (cTBS) in humans are poorly understood. Animal studies can clarify the effects of cTBS on individual neurons, but behavioral evidence is necessary to demonstrate the validity of the animal model. We investigated the behavioral effect of cTBS applied over parietal cortex in rhesus monkeys performing a visually-guided grasping task with two differently sized objects, which required either a power grip or a pad-to-side grip. We used Fitts’ law, predicting shorter grasping times (GT) for large compared to small objects, to investigate cTBS effects on two different grip types. cTBS induced long-lasting object-specific and dose-dependent changes in GT that remained present for up to two hours. High-intensity cTBS increased GTs for a power grip, but shortened GTs for a pad-to-side grip. Thus, high-intensity stimulation strongly reduced the natural GT difference between objects (i.e. the Fitts’ law effect). In contrast, low-intensity cTBS induced the opposite effects on GT. Modifying the coil orientation from the standard 45-degree to a 30-degree angle induced opposite cTBS effects on GT. These findings represent behavioral evidence for the validity of the nonhuman primate model to study the neural underpinnings of non-invasive brain stimulation.

Speed of processing in the primary motor cortex: A continuous theta burst stimulation study

2014 ◽  
Vol 261 ◽  
pp. 177-184 ◽  
Author(s):  
Bimal Lakhani ◽  
David A.E. Bolton ◽  
Veronica Miyasike-daSilva ◽  
Albert H. Vette ◽  
William E. McIlroy
Keyword(s):  
Motor Cortex ◽  
Primary Motor Cortex ◽  
Speed Of Processing ◽  
Theta Burst Stimulation ◽  
Burst Stimulation ◽  
Theta Burst ◽  
Continuous Theta Burst Stimulation
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