scholarly journals Resting state connectivity of the bed nucleus of the stria terminalis at ultra-high field

2015 ◽  
Vol 36 (10) ◽  
pp. 4076-4088 ◽  
Author(s):  
Salvatore Torrisi ◽  
Katherine O'Connell ◽  
Andrew Davis ◽  
Richard Reynolds ◽  
Nicholas Balderston ◽  
...  
Keyword(s):  
Resting State ◽  
High Field ◽  
Stria Terminalis ◽  
Ultra High Field ◽  
Bed Nucleus ◽  
Resting State Connectivity

scholarly journals Resting-state connectivity of the bed nucleus of the stria terminalis and the central nucleus of the amygdala in clinical anxiety

2019 ◽  
Vol 44 (5) ◽  
pp. 313-323 ◽  
Author(s):  
Salvatore Torrisi ◽  
Gabriella M. Alvarez ◽  
Adam X. Gorka ◽  
Bari Fuchs ◽  
Marilla Geraci ◽  
...  
Keyword(s):  
Resting State ◽  
Central Nucleus ◽  
Stria Terminalis ◽  
Bed Nucleus ◽  
Resting State Connectivity

scholarly journals Investigating resting-state functional connectivity in the cervical spinal cord at 3T

2016 ◽  
Author(s):  
Falk Eippert ◽  
Yazhuo Kong ◽  
Anderson M. Winkler ◽  
Jesper L. Andersson ◽  
Jürgen Finsterbusch ◽  
...  
Keyword(s):  
Spinal Cord ◽  
Spinal Cord Injury ◽  
Dorsal Horn ◽  
Resting State ◽  
High Field ◽  
Cervical Spinal Cord ◽  
Ventral Horn ◽  
Ultra High Field ◽  
Cord Injury ◽  
Resting State Connectivity

AbstractThe study of spontaneous fluctuations in the blood-oxygen-level-dependent (BOLD) signal has recently been extended from the brain to the spinal cord. Two ultra-high field functional magnetic resonance imaging (fMRI) studies in humans have provided evidence for reproducible resting-state connectivity between the dorsal horns as well as between the ventral horns, and a study in non-human primates has shown that these resting-state signals are impacted by spinal cord injury. As these studies were carried out at ultra-high field strengths using region-of-interest (ROI) based analyses, we investigated whether such resting-state signals could also be observed at the clinically more prevalent field strength of 3T. In a reanalysis of a sample of 20 healthy human participants who underwent a resting-state fMRI acquisition of the cervical spinal cord, we were able to observe significant dorsal horn connectivity as well as ventral horn connectivity, but no consistent effects for connectivity between dorsal and ventral horns, thus replicating the human 7T results. These effects were not only observable when averaging along the acquired length of the spinal cord, but also when we examined each of the acquired spinal segments separately, which showed similar patterns of connectivity. Finally, we investigated the robustness of these resting-state signals against variations in the analysis pipeline by varying the type of ROI creation, temporal filtering, nuisance regression and connectivity metric. We observed that – apart from the effects of band-pass filtering – ventral horn connectivity showed excellent robustness, whereas dorsal horn connectivity showed moderate robustness. Together, our results provide evidence that spinal cord resting-state connectivity is a robust and spatially consistent phenomenon that could be a valuable tool for investigating the effects of pathology, disease progression, and treatment response in neurological conditions with a spinal component, such as spinal cord injury.

scholarly journals Resting state connectivity of the human habenula at ultra-high field

NeuroImage ◽  
2017 ◽  
Vol 147 ◽  
pp. 872-879 ◽  
Author(s):  
Salvatore Torrisi ◽  
Camilla L. Nord ◽  
Nicholas L. Balderston ◽  
Jonathan P. Roiser ◽  
Christian Grillon ◽  
...  
Keyword(s):  
Resting State ◽  
High Field ◽  
Ultra High Field ◽  
Resting State Connectivity

scholarly journals Resting‐state fMRI effective connectivity between the bed nucleus of the stria terminalis and amygdala nuclei

2019 ◽  
Vol 40 (9) ◽  
pp. 2723-2735 ◽  
Author(s):  
David Hofmann ◽  
Thomas Straube
Keyword(s):  
Resting State ◽  
Effective Connectivity ◽  
Resting State Fmri ◽  
Stria Terminalis ◽  
Bed Nucleus

scholarly journals Globally conditioned Granger causality in brain–brain and brain–heart interactions: a combined heart rate variability/ultra-high-field (7 T) functional magnetic resonance imaging study

2016 ◽  
Vol 374 (2067) ◽  
pp. 20150185 ◽  
Author(s):  
Andrea Duggento ◽  
Marta Bianciardi ◽  
Luca Passamonti ◽  
Lawrence L. Wald ◽  
Maria Guerrisi ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Resting State ◽  
High Field ◽  
Brain Activity ◽  
Brain Regions ◽  
Sympathovagal Balance ◽  
Functional Magnetic Resonance ◽  
Resonance Imaging ◽  
Ultra High Field ◽  
Conditioned Approach

The causal, directed interactions between brain regions at rest (brain–brain networks) and between resting-state brain activity and autonomic nervous system (ANS) outflow (brain–heart links) have not been completely elucidated. We collected 7 T resting-state functional magnetic resonance imaging (fMRI) data with simultaneous respiration and heartbeat recordings in nine healthy volunteers to investigate (i) the causal interactions between cortical and subcortical brain regions at rest and (ii) the causal interactions between resting-state brain activity and the ANS as quantified through a probabilistic, point-process-based heartbeat model which generates dynamical estimates for sympathetic and parasympathetic activity as well as sympathovagal balance. Given the high amount of information shared between brain-derived signals, we compared the results of traditional bivariate Granger causality (GC) with a globally conditioned approach which evaluated the additional influence of each brain region on the causal target while factoring out effects concomitantly mediated by other brain regions. The bivariate approach resulted in a large number of possibly spurious causal brain–brain links, while, using the globally conditioned approach, we demonstrated the existence of significant selective causal links between cortical/subcortical brain regions and sympathetic and parasympathetic modulation as well as sympathovagal balance. In particular, we demonstrated a causal role of the amygdala, hypothalamus, brainstem and, among others, medial, middle and superior frontal gyri, superior temporal pole, paracentral lobule and cerebellar regions in modulating the so-called central autonomic network (CAN). In summary, we show that, provided proper conditioning is employed to eliminate spurious causalities, ultra-high-field functional imaging coupled with physiological signal acquisition and GC analysis is able to quantify directed brain–brain and brain–heart interactions reflecting central modulation of ANS outflow.

scholarly journals Resting-state functional connectivity of the bed nucleus of the stria terminalis in post-traumatic stress disorder and its dissociative subtype

2017 ◽  
Vol 39 (3) ◽  
pp. 1367-1379 ◽  
Author(s):  
Daniela Rabellino ◽  
Maria Densmore ◽  
Sherain Harricharan ◽  
Théberge Jean ◽  
Margaret C. McKinnon ◽  
...  
Keyword(s):  
Post Traumatic Stress Disorder ◽  
Traumatic Stress ◽  
Resting State ◽  
Stress Disorder ◽  
Stria Terminalis ◽  
Post Traumatic Stress ◽  
Resting State Functional Connectivity ◽  
Bed Nucleus ◽  
Post Traumatic ◽  
Dissociative Subtype

scholarly journals Whole brain mapping of somatosensory responses in awake marmosets investigated with ultra-high-field fMRI

2020 ◽  
Vol 124 (6) ◽  
pp. 1900-1913
Author(s):  
Justine C. Cléry ◽  
Yuki Hori ◽  
David J. Schaeffer ◽  
Joseph S. Gati ◽  
J. Andrew Pruszynski ◽  
...  
Keyword(s):  
Functional Connectivity ◽  
Brain Mapping ◽  
Resting State ◽  
High Field ◽  
Body Representation ◽  
Resting State Fmri ◽  
Fmri Data ◽  
Ultra High Field ◽  
Somatosensory Stimulation ◽  
Somatosensory Responses

We used somatosensory stimulation combined with functional MRI (fMRI) in awake marmosets to reveal the topographic body representation in areas S1, S2, thalamus, and putamen. We showed the existence of a body representation organization within the thalamus and the cingulate cortex by computing functional connectivity maps from seeds defined in S1/S2 using resting-state fMRI data. This noninvasive approach will be essential for chronic studies by guiding invasive recording and manipulation techniques.

scholarly journals Ultra-high field (10.5 T) resting state fMRI in the macaque

NeuroImage ◽  
2020 ◽  
Vol 223 ◽  
pp. 117349
Author(s):  
Essa Yacoub ◽  
Mark D. Grier ◽  
Edward J. Auerbach ◽  
Russell L. Lagore ◽  
Noam Harel ◽  
...  
Keyword(s):  
Resting State ◽  
High Field ◽  
Resting State Fmri ◽  
Ultra High Field
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