Echoplanar BOLD fMRI of Brain Activation Induced by Concurrent Transcranial Magnetic Stimulation

Can the brain be shifted into a different state using a simple social cue, as tests on highly hypnotisable subjects would suggest? Demonstrating an altered brain state is difficult. Brain activation varies greatly during wakefulness and can be voluntarily influenced. We measured the complexity of electrophysiological response to transcranial magnetic stimulation (TMS) in one “hypnotic virtuoso”. Such a measure produces a response outside the subject’s voluntary control and has been proven adequate for discriminating conscious from unconscious brain states. We show that a single-word hypnotic induction robustly shifted global neural connectivity into a state where activity remained sustained but failed to ignite strong, coherent activity in frontoparietal cortices. Changes in perturbational complexity indicate a similar move toward a more segregated state. We interpret these findings to suggest a shift in the underlying state of the brain, likely moderating subsequent hypnotic responding. [preprint updated 20/02/2020]

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Tinnitus and Brain Activation: Insights from Transcranial Magnetic Stimulation

Ear Nose & Throat Journal ◽

10.1177/014556130608500412 ◽

2006 ◽

Vol 85 (4) ◽

pp. 233-238 ◽

Cited By ~ 15

Author(s):

Renata Marcondes ◽

Felipe Fregni ◽

Alvaro Pascual-Leone

Keyword(s):

Transcranial Magnetic Stimulation ◽

Magnetic Stimulation ◽

Brain Activation

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Using simultaneous repetitive Transcranial Magnetic Stimulation/functional Near Infrared Spectroscopy (rTMS/fNIRS) to measure brain activation and connectivity

NeuroImage ◽

10.1016/j.neuroimage.2009.05.016 ◽

2009 ◽

Vol 47 (4) ◽

pp. 1177-1184 ◽

Cited By ~ 40

Author(s):

F. Andrew Kozel ◽

Fenghua Tian ◽

Sameer Dhamne ◽

Paul E. Croarkin ◽

Shawn M. McClintock ◽

...

Keyword(s):

Infrared Spectroscopy ◽

Transcranial Magnetic Stimulation ◽

Near Infrared Spectroscopy ◽

Magnetic Stimulation ◽

Near Infrared ◽

Repetitive Transcranial Magnetic Stimulation ◽

Brain Activation ◽

Functional Near Infrared Spectroscopy

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Mathematics and TMS

10.1093/oxfordhb/9780198568926.013.0033 ◽

2012 ◽

Author(s):

Elena Rusconi ◽

Carlo Umiltà

Keyword(s):

Transcranial Magnetic Stimulation ◽

Magnetic Stimulation ◽

Right Hemisphere ◽

Parietal Lobe ◽

Brain Activation ◽

Number Line ◽

Mathematical Cognition ◽

Mental Number Line ◽

The Right ◽

The Relationship

This article introduces the relationship between mathematical cognition and transcranial magnetic stimulation (TMS). The mental number line is located in the parietal lobe. Studies employing TMS have explored issues related to the mental number line. This article reviews the studies centered on the magnitude code. The results show that even though the parietal activation is nearly always present in both hemispheres, it is often asymmetric, being greater in the right hemisphere when quantification of nonverbal and nonsymbolic material is required. Neuropsychological studies confirm the relation between the magnitude code and the parietal lobe. The extent to which number-related processes are number specific, and the extent to which they overlap with other aspects of spatial or magnitude representation, is currently a burgeoning area of research. Current work is aimed to disrupt numerical processes and observe concomitant changes in brain activation.

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