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Effects of severing the corpus callosum on electrical and BOLD functional connectivity and spontaneous dynamic activity in the rat brain
2013
Brain Connectivity
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In this work callosotomized rodents are examined, providing a unique platform for evaluating the influence of structural connectivity via the corpus callosum on bilateral resting state functional connectivity ...
Functional networks, defined by synchronous spontaneous blood oxygenation level-dependent (BOLD) oscillations between spatially distinct brain regions, appear to be essential to brain function and have ...
We would also like to thank the NIH for two primary funding sources used to fund the research presented in this article (R21NS057718 and T32EB005969). ...
doi:10.1089/brain.2013.0167
pmid:24117343
pmcid:PMC3931437
fatcat:sfgtny7wl5g25cdgr4z4sal3em
Evidence for Impaired Plasticity after Traumatic Brain Injury in the Developing Brain
2014
Journal of Neurotrauma
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in layer V of the noninjured S1 by stimulation of the corpus callosum (82% decrease). ...
The results suggest that post-TBI plasticity can translate into inappropriate neuronal connections and dramatic changes in the function of neuronal networks. ...
Acknowledgments This work was supported by Johns Hopkins Brain Science Institute and the National Institutes of Health/National Institute of Neurological Disorders and Stroke (grant no. R01NS072171). ...
doi:10.1089/neu.2013.3059
pmid:24050267
pmcid:PMC3922417
fatcat:ihgtop7tl5fhvhr3tsoshfiic4
Laminar-specific interhemispheric connectivity mapping with bilateral line-scanning fMRI
[article]
2021
bioRxiv
pre-print
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Despite extensive studies detecting blood-oxygen-level-dependent (BOLD) fMRI signals across two hemispheres to present cognitive processes in normal and diseased brains, the role of corpus callosum (CC ...
Several studies show maintaining low-frequency fluctuation of resting-state (rs)-fMRI signals in homotopic brain areas of acallosal humans and post-callosotomy animals, raising the question: how can we ...
., Effects of severing the corpus callosum on electrical and BOLD functional
391
connectivity and spontaneous dynamic activity in the rat brain. Brain Connect, 2014. 4(1): p. 15-29.
392
14. ...
doi:10.1101/2021.03.08.433876
fatcat:fqkmys5gffblljp7hxic6cddo4
White Matter Reorganization and Functional Response after Focal Cerebral Ischemia in the Rat
2012
PLoS ONE
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Our study shows the influence of the internal capsule reorganization, combined with inter-hemispheric connections though the corpus callosum, on the functional activation of the brain from stroke. ...
Furthermore, fiber tracking showed a transhemispheric fiber connection through the corpus callosum, which-in the rat without functional recovery-was lost. ...
Acknowledgments The biological expertise of Andreas Beyrau, the expertise of Michael Diedenhofen during data post-processing and the graphical expertise of Ulla Uhlenküken are gratefully acknowledged. ...
doi:10.1371/journal.pone.0045629
pmid:23029148
pmcid:PMC3445514
fatcat:musnl4uw35heveickcqc3fqq4q
Temporal scaling properties and spatial synchronization of spontaneous blood oxygenation level-dependent (BOLD) signal fluctuations in rat sensorimotor network at different levels of isoflurane anesthesia
2011
NMR in Biomedicine
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In order to obtain more insights into this relationship and, in particular, the effects of anesthesia thereupon, we investigated the spatial and temporal correlations of spontaneous BOLD fluctuations in ...
Yet, the relationship between functional brain status and the characteristics of spontaneous BOLD fluctuations remains poorly understood. ...
However, the effect of altered functional status of the brain, such as under anesthesia, on spontaneous BOLD signal fluctuations is still largely unclear. ...
doi:10.1002/nbm.1556
pmid:20669170
fatcat:r7tmzicl5fcg7f2qfymawdseuu
Layer-specific interhemispheric functional connectivity in the somatosensory cortex of rats: resting state electrophysiology and fMRI studies
2015
Brain Structure and Function
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We investigated the characteristics of bihemispheric functional connectivity via electrophysiology and rsfMRI in the primary sensory cortex of rats anesthetized by a-chloralose. ...
Our findings demonstrated the diverse activity patterns of layer-specific electrophysiological substrates and suggest the recruitment of multiple, non-specific brain regions in construction of interhemispheric ...
The role of the corpus callosum has been demonstrated in previous functional connectivity studies which involved disruption of the corpus callosum connectivity in animals (Mohajerani et al. 2010; Magnuson ...
doi:10.1007/s00429-015-1073-0
pmid:26077581
pmcid:PMC4681693
fatcat:f6ovcrie6fbz3brpv4d5xwvzxe
Visual callosal connections: role in visual processing in health and disease
2014
Reviews in the Neurosciences
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Visual cortical areas in the two sides of the brain are interconnected by interhemispheric fibers passing through the splenium of the corpus callosum. ...
We also review data highlighting the contribution of callosal input activity to maturation of visual function during early ' critical periods ' in brain development and describe how interhemispheric transfer ...
Introduction The corpus callosum is the major white matter structure in the brain. ...
doi:10.1515/revneuro-2013-0025
pmid:24127537
fatcat:cu7lfzsdwjapdexyfjepnirelm
Workshop on Neurobiology of Epilepsy appraisal: New systemic imaging technologies to study the brain in experimental models of epilepsy
2014
Epilepsia
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Successful application of functional neuroimaging of the whole brain in the animal laboratory now permits investigations during epileptogenesis and correlation with deep brain electroencephalography (EEG ...
Modern functional neuroimaging provides opportunities to visualize activity of the entire brain, making it an indispensable diagnostic tool for epilepsy. ...
We confirm that we have read the Journal's position on issues involved in ethical publication and affirm that this report is consistent with those guidelines. ...
doi:10.1111/epi.12642
pmid:24836499
pmcid:PMC4057947
fatcat:5q7wx7546rf5nimtya53we36zy
Monkey in the middle: why non-human primates are needed to bridge the gap in resting-state investigations
2012
Frontiers in Neuroanatomy
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Resting-state investigations based on the evaluation of intrinsic low-frequency fluctuations of the BOLD fMRI signal have been extensively utilized to map the structure and dynamics of large-scale functional ...
In addition to increasing our knowledge of normal brain connectivity, disruptions of the spontaneous hemodynamic fluctuations have been suggested as possible diagnostic indicators of neurological and psychiatric ...
CORRELATES OF SPONTANEOUS BOLD ACTIVITY AND RSNs The BOLD signal is not a direct measure of neural activity as would be recorded in electrophysiological experiments. ...
doi:10.3389/fnana.2012.00029
pmid:22855672
pmcid:PMC3405297
fatcat:2hwi3bzqjjcrtlazyjh4ulvipm
Considerations for resting state functional MRI and functional connectivity studies in rodents
2015
Frontiers in Neuroscience
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Resting state functional MRI (rs-fMRI) and functional connectivity mapping have become widely used tools in the human neuroimaging community and their use is rapidly spreading into the realm of rodent ...
One of the many attractive features of rs-fMRI is that it is readily translatable from humans to animals and back again. ...
For example, left and right primary somatosensory cortex are directly connected via the corpus callosum and as expected exhibit strong functional connectivity. ...
doi:10.3389/fnins.2015.00269
pmid:26300718
pmcid:PMC4525377
fatcat:izgtvld2k5fwdh4jdsqy63vlsm
Neural and metabolic basis of dynamic resting state fMRI
2018
NeuroImage
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Even an incrementally better understanding of the neurometabolic basis of dynamic rsfMRI would expand rsfMRI's research and clinical utility, and the studies described herein take the first steps on that ...
and metabolic activity. ...
The funding sources were not involved in the writing of this review. ...
doi:10.1016/j.neuroimage.2017.09.010
pmid:28899744
pmcid:PMC5844792
fatcat:mb36grksezd4rfj55wfkry26ve
Recovery of Sensorimotor Function after Experimental Stroke Correlates with Restoration of Resting-State Interhemispheric Functional Connectivity
2010
Journal of Neuroscience
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Despite the success of functional imaging to map changes in brain activation patterns after stroke, spatiotemporal dynamics of cerebral reorganization in correlation with behavioral recovery remain incompletely ...
changes in associated function after unilateral stroke in rats. ...
Tracing experiments in the current study clearly demonstrated effective transfer of the neuronal tracers manganese, BDA, and PHA-L from contralesional M1 through the corpus callosum toward ipsilesional ...
doi:10.1523/jneurosci.5709-09.2010
pmid:20237267
fatcat:plm3ftgz7jdvrf2g5w3u2glrdm
Spatiotemporal dynamics of low frequency fluctuations in BOLD fMRI of the rat
2009
Journal of Magnetic Resonance Imaging
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Keywords functional connectivity; low frequency fluctuations; spontaneous neural activity; spatiotemporal dynamics; rat cortex LOW FREQUENCY FLUCTUATIONS (LFFs) in the blood oxygenation level dependent ...
The possibility that correlated LFFs reflect the spontaneous "functional connectivity" of the brain has excited the interest of the fMRI and neuroscience communities, and the number of studies using the ...
ACKNOWLEDGMENTS The authors thank the Laboratory for Functional and Molecular Imaging at the National Institutes of Health for use of the 11.7T animal scanner, with special thanks to Dr. ...
doi:10.1002/jmri.21848
pmid:19629982
pmcid:PMC2758521
fatcat:56nxjilsgjezdlq3ht47nf3lbi
Mapping the functional network of medial prefrontal cortex by combining optogenetics and fMRI in awake rats
2015
NeuroImage
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This activation pattern was robust, reproducible, and did not depend on the stimulation period in awake rats. BOLD signals, however, were substantially reduced when animals were anesthetized. ...
Here we combined optogenetic stimulation and functional magnetic resonance imaging (opto-fMRI) to reveal the network of brain regions functionally activated by mPFC outputs in awake rodents. ...
the National Institute of Neurological Disorders and Stroke. ...
doi:10.1016/j.neuroimage.2015.05.036
pmid:26002727
pmcid:PMC4512884
fatcat:4ojeclql2zf4bahgeezwvipxsi
Probing Intrinsic Resting-State Networks in the Infant Rat Brain
2016
Frontiers in Behavioral Neuroscience
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Several rs-fMRI studies have been conducted in anesthetized and awake adult rats, reporting consistent patterns of brain activity at the systems level. ...
However, the evolution to adult patterns of resting-state activity has not yet been evaluated and quantified in the developing rat brain. ...
The content of the article is solely the responsibility of the authors and does not necessarily represent the official views of the National Institutes of Health. ...
doi:10.3389/fnbeh.2016.00192
pmid:27803653
pmcid:PMC5067436
fatcat:y34rp2qwe5dmhievz44jbuk3ae
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