scholarly journals Self-Modulation of Premotor Cortex Interhemispheric Connectivity in a Real-Time Functional Magnetic Resonance Imaging Neurofeedback Study Using an Adaptive Approach

2019 ◽  
Vol 9 (9) ◽  
pp. 662-672 ◽  
Author(s):  
João Pereira ◽  
Bruno Direito ◽  
Alexandre Sayal ◽  
Carlos Ferreira ◽  
Miguel Castelo-Branco
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Functional Magnetic Resonance Imaging ◽  
Real Time ◽  
Premotor Cortex ◽  
Functional Magnetic Resonance ◽  
Resonance Imaging ◽  
Adaptive Approach ◽  
Interhemispheric Connectivity

scholarly journals Encoding of Novel Verbal Instructions for Prospective Action in the Lateral Prefrontal Cortex: Evidence from Univariate and Multivariate Functional Magnetic Resonance Imaging Analysis

2018 ◽  
Vol 30 (8) ◽  
pp. 1170-1184 ◽  
Author(s):  
Nicolas J. Bourguignon ◽  
Senne Braem ◽  
Egbert Hartstra ◽  
Jan De Houwer ◽  
Marcel Brass
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Functional Magnetic Resonance Imaging ◽  
Premotor Cortex ◽  
Functional Magnetic Resonance ◽  
Resonance Imaging ◽  
Task Instructions ◽  
Verbal Instructions ◽  
Fmri Session ◽  
Pattern Similarity

Verbal instructions are central to humans' capacity to learn new behaviors with minimal training, but the neurocognitive mechanisms involved in verbally instructed behaviors remain puzzling. Recent functional magnetic resonance imaging (fMRI) evidence suggests that the right middle frontal gyrus and dorsal premotor cortex (rMFG-dPMC) supports the translation of symbolic stimulus–response mappings into sensorimotor representations. Here, we set out to (1) replicate this finding, (2) investigate whether this region's involvement is specific to novel (vs. trained) instructions, and (3) study whether rMFG-dPMC also shows differences in its (voxel) pattern response indicative of general cognitive processes of instruction implementation. Participants were shown instructions, which they either had to perform later or merely memorize. Orthogonal to this manipulation, the instructions were either entirely novel or had been trained before the fMRI session. Results replicate higher rMFG-dPMC activation levels during instruction implementation versus memorization and show how this difference is restricted to novel, but not trained, instruction presentations. Pattern similarity analyses at the voxel level further reveal more consistent neural pattern responses in rMFG-dPMC during the implementation of novel versus trained instructions. In fact, this more consistent neural pattern response seemed to be specific to the first instruction presentation and disappeared after the instruction had been applied once. These results further support a role of rMFG-dPMC in the implementation of novel task instructions and highlight potentially important differences in studying this region's gross activation levels versus (the consistency of) its response patterns.

scholarly journals Quality and denoising in real‐time functional magnetic resonance imaging neurofeedback: A methods review

2020 ◽  
Vol 41 (12) ◽  
pp. 3439-3467 ◽  
Author(s):  
Stephan Heunis ◽  
Rolf Lamerichs ◽  
Svitlana Zinger ◽  
Cesar Caballero‐Gaudes ◽  
Jacobus F. A. Jansen ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Functional Magnetic Resonance Imaging ◽  
Real Time ◽  
Functional Magnetic Resonance ◽  
Resonance Imaging

scholarly journals Real-Time Functional Magnetic Resonance Imaging Neurofeedback for the Relief of Distressing Auditory-Verbal Hallucinations: Methodological and Empirical Advances

2020 ◽  
Vol 46 (6) ◽  
pp. 1409-1417 ◽  
Author(s):  
Clara Humpston ◽  
Jane Garrison ◽  
Natasza Orlov ◽  
André Aleman ◽  
Renaud Jardri ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Functional Magnetic Resonance Imaging ◽  
Real Time ◽  
Best Practice ◽  
Mechanistic Models ◽  
Schizophrenia Spectrum Disorders ◽  
Functional Magnetic Resonance ◽  
Resonance Imaging ◽  
Auditory Verbal Hallucinations

Abstract Auditory-verbal hallucinations (AVH) are often associated with high levels of distress and disability in individuals with schizophrenia-spectrum disorders. In around 30% of individuals with distressing AVH and diagnosed with schizophrenia, traditional antipsychotic drugs have little or no effect. Thus, it is important to develop mechanistic models of AVH to inform new treatments. Recently a small number of studies have begun to explore the use of real-time functional magnetic resonance imaging neurofeedback (rtfMRI-NF) for the treatment of AVH in individuals with schizophrenia. rtfMRI-NF protocols have been developed to provide feedback about brain activation in real time to enable participants to progressively achieve voluntary control over their brain activity. We offer a conceptual review of the background and general features of neurofeedback procedures before summarizing and evaluating existing mechanistic models of AVH to identify feasible neural targets for the application of rtfMRI-NF as a potential treatment. We consider methodological issues, including the choice of localizers and practicalities in logistics when setting up neurofeedback procedures in a clinical setting. We discuss clinical considerations relating to the use of rtfMRI-NF for AVH in individuals distressed by their experiences and put forward a number of questions and recommendations about best practice. Lastly, we conclude by offering suggestions for new avenues for neurofeedback methodology and mechanistic targets in relation to the research and treatment of AVH.

The influence of complex action knowledge on representations of novel graspable objects: Evidence from functional magnetic resonance imaging

2007 ◽  
Vol 13 (6) ◽  
pp. 1009-1020 ◽  
Author(s):  
SARAH H. CREEM-REGEHR ◽  
VALENTINA DILDA ◽  
APRIL E. VICCHRILLI ◽  
FREDERICK FEDERER ◽  
JAMES N. LEE
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Functional Magnetic Resonance Imaging ◽  
Visual Memory ◽  
Premotor Cortex ◽  
Effect Sizes ◽  
Functional Magnetic Resonance ◽  
Resonance Imaging ◽  
Action Knowledge ◽  
Novel Objects

The influence of action knowledge associated with novel objects was investigated using functional magnetic resonance imaging. Participants were trained on complex actions associated with novel objects (“tools”) and had experience manipulating other visually similar novel objects (“shapes”). During scanning, participants viewed, imagined grasping, and imagined using the objects. Based on previous neuroimaging and neuropsychological findings, our primary goal was to examine frontal and parietal regions subserving action representations associated with visual objects, namely the left inferior parietal lobule (IPL), the left ventral premotor cortex (VPM) and the presupplementary motor cortex (pre-SMA). We predicted differences between the tool and shape stimuli, modulated also by task demands. In viewing, we found greater effect sizes in the left VPM and IPL for tools versus shapes. In grasping, there was similar activation with both object types. The largest differences existed in using, in which greater effect sizes were found for tools versus shapes in left IPL and pre-SMA, and marginally in the left VPM. We suggest that representations of tools extend beyond classically defined affordances and recruit processing about both graspability and known action plans in tasks involving visual memory, motor imagery, and motor execution. (JINS, 2007, 13, 1009–1020.)

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