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The relationship between motor deficit and hemisphere activation balance after stroke: A 3T fMRI study
2007
NeuroImage
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Although this may be adaptive, the relationship between the severity of motor deficit and the hemisphere activation balance for the four major cortical motor areas has not been systematically studied. ...
Functional imaging during movement of the hand affected by a stroke has shown excess activation of the contralesional motor network, implying less physiological hemisphere activation balance. ...
Furthermore, the relationship between hemisphere activation balance and motor deficit for two other major cortical areas, namely the primary sensory cortex (S1), and the supplementary motor area (SMA) ...
doi:10.1016/j.neuroimage.2006.08.026
pmid:17045490
fatcat:hnydmp5rwberdirsajo2aumvdy
The relationship between motor deficit and primary motor cortex hemispheric activation balance after stroke: longitudinal fMRI study
2010
Journal of Neurology, Neurosurgery and Psychiatry
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The relationship between motor deficit and primary motor cortex hemispheric activation balance after stroke: longitudinal fMRI study. ...
Abstract Background: In the chronic stage of stroke, previous work has shown that the worse the hand motor deficit the greater the shift of primary motor cortex (M 1 ) activation towards the contralesional ...
Thus, fMRI studies in chronic stroke patients with variably recovered motor deficit have reported a significant correlation between the degree of hand motor impairment and the LI for the primary motor ...
doi:10.1136/jnnp.2009.190512
pmid:20392975
fatcat:jjl3vvzygnfotno2qbcclzg3o4
Assessment of Inter-Hemispheric Imbalance Using Imaging and Noninvasive Brain Stimulation in Patients With Chronic Stroke
2015
Archives of Physical Medicine and Rehabilitation
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In patients with chronic motor deficits of the upper limb, fMRI may serve to mark perceived disability and transcallosal influence between hemispheres. ...
. fMRI studied whether cortical activation during the movement of the paretic hand was lateralized to the ipsilesional or to the contralesional primary motor cortex (M1), premotor cortex (PMC), and supplementary ...
stroke it is believed that hand deficits persist because of an imbalance between the ipsilesional and the contralesional hemisphere activity ...
doi:10.1016/j.apmr.2014.07.419
pmid:25194451
pmcid:PMC4348350
fatcat:7a4osyuayjaxfli5mawyxzwq6q
Neural effective connectivity explains subjective fatigue in stroke
2021
Brain
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We suggest that the balance in inter-hemispheric inhibitory effects between primary motor regions can explain subjective post-stroke fatigue. ...
In a multiple regression we used the balance in inhibitory connectivity between homologue regions in M1 as the main predictor, and have included lesioned hemisphere, RMT and levels of depression as additional ...
Acknowledgements We would like to acknowledge the help of Ms Cora Burke and Ms Isobel Turner who were involved in data collection of fMRI data. ...
doi:10.1093/brain/awab287
pmid:34791073
pmcid:PMC8967104
fatcat:np5nizdycjczrifsfa5kxkamt4
A Review of Transcranial Magnetic Stimulation and Multimodal Neuroimaging to Characterize Post-Stroke Neuroplasticity
2015
Frontiers in Neurology
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The severity of motor deficits indexed using TMS has been linked to the magnitude of activity imbalance between the sensorimotor cortices. ...
In this paper, we will provide a narrative review of data from studies utilizing DTI, MRS, fMRI, EEG, and brain stimulation techniques focusing on TMS and its combination with uni-and multimodal neuroimaging ...
Another recent study combined fMRI, DTI, and TMS in the assessment of hemispheric balance between ipsilesional and contralesional cortices (229) . ...
doi:10.3389/fneur.2015.00226
pmid:26579069
pmcid:PMC4625082
fatcat:p252vs44nfhhhnrttlfe34eccu
White Matter Integrity Is a Stronger Predictor of Motor Function Than BOLD Response in Patients With Stroke
2011
Neurorehabilitation and Neural Repair
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of the cortical motor system after stroke. ...
This study explores the relationship between upper extremity motor function, white matter integrity, and BOLD response of cortical motor areas. Methods. ...
Funding The author(s) disclosed receipt of the following financial support for the research and/or authorship of this article: This study was sponsored by the National Institutes of Health (Grant Number ...
doi:10.1177/1545968310389183
pmid:21357529
pmcid:PMC3579586
fatcat:qxxmtlmbtjf3nmrucnhdpn22mm
Individual prediction of chronic motor outcome in the acute post-stroke stage: Behavioral parameters versus functional imaging
2015
Human Brain Mapping
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In conclusion, multivariate decoding of fMRI data with SVM early after stroke enables a robust prediction of motor recovery. ...
To this end, twenty-one first-ever stroke patients with hand motor deficits participated in an fMRI hand motor task in the first few days post-stroke. ...
CG and GRF are supported by the University of Cologne Emerging Groups Initiative (CONNECT group) implemented into the Institutional Strategy of the University of Cologne and the German Excellence Initiative ...
doi:10.1002/hbm.22936
pmid:26381168
pmcid:PMC4619153
fatcat:y43zm2cydncwfnm66jqvubbuoa
Disruptions of network connectivity predict impairment in multiple behavioral domains after stroke
2016
Proceedings of the National Academy of Sciences of the United States of America
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We measured resting functional connectivity (FC), lesion topography, and behavior in multiple domains (attention, visual memory, verbal memory, language, motor, and visual) in a cohort of 132 stroke patients ...
Deficits following stroke are classically attributed to focal damage, but recent evidence suggests a key role of distributed brain network disruption. ...
This study was supported by National Institute of Child Health and Human Development Health Award 5R01HD061117 (to M.C.), National Institute of Neurologic Disorders and Stroke (P30 NS048056 to A.Z.S.), ...
doi:10.1073/pnas.1521083113
pmid:27402738
pmcid:PMC4968743
fatcat:2hdsfy2m3rfhho6ona6lkvboky
Longitudinal Brain Functional Connectivity Changes of the Cortical Motor-Related Network in Subcortical Stroke Patients with Acupuncture Treatment
2017
Neural Plasticity
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The neurological deficit scores (NDS) and resting-state functional MRI data were collected before and after treatment. ...
Moreover, a significant correlation between the percent changes of NDS and the pretreatment FC values of bilateral primary motor cortex (M1) in all patients was found. ...
Acknowledgments This research received funding from the National Natural Science Foundation of China (no. 81601483, no. 81072864, and no. 61427807) as well as a support by the National Natural Science ...
doi:10.1155/2017/5816263
pmid:29375914
pmcid:PMC5742470
fatcat:4eq53rtkb5a3hm7izcocamfqie
Interhemispheric Cerebral Blood Flow Balance during Recovery of Motor Hand Function after Ischemic Stroke—A Longitudinal MRI Study Using Arterial Spin Labeling Perfusion
2014
PLoS ONE
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Objective: To quantify longitudinal CBF changes using arterial spin labeling MRI (ASL) and interhemispheric balance within the cortical sensorimotor network and to assess their relationship with motor ...
Unilateral ischemic stroke disrupts the well balanced interactions within bilateral cortical networks. Restitution of interhemispheric balance is thought to contribute to post-stroke recovery. ...
Acknowledgments We thank our patients and their caregivers for participating in our study.
Author Contributions ...
doi:10.1371/journal.pone.0106327
pmid:25191858
pmcid:PMC4156327
fatcat:pwepliwd7rg4nm2a3rlzkpolcy
Magnetic Resonance Imaging to Visualize Stroke and Characterize Stroke Recovery: A Review
2013
Frontiers in Neurology
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Here we provide a basic review of MRI physical principles and applications for assessing stroke, looking toward the future role MRI may play in improving stroke rehabilitation methods and stroke recovery ...
Many now view brain recovery after stroke as an area of scientific research with large potential for therapeutic advances, far into the future (Broderick and William, 2004). ...
In the future, it may be possible to find synergies between task and rs-fMRI approaches to advance our understanding of activation patterns that explain or predict recovery after stroke. ...
doi:10.3389/fneur.2013.00060
pmid:23750149
pmcid:PMC3664317
fatcat:jigs3qhoiff7ris57wfl5setl4
Early parietofrontal network upregulation relates to future persistent deficits after severe stroke – a prospective cohort study
2021
Brain Communications
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This study provides novel insights that parietofrontal networks of the ipsilesional hemisphere undergo neuroplastic alteration already very early after severe motor stroke. ...
The main finding was a significant increase in ipsilesional parietofrontal coupling between anterior intraparietal sulcus and the primary motor cortex in severely affected stroke patients (P < 0.003 ...
The current study found an association between network properties of the parietofrontal motor network during the first days after stroke and future levels of neurological deficits and global dependence ...
doi:10.1093/braincomms/fcab097
pmid:34056601
pmcid:PMC8154858
fatcat:vwwv3uw3fnbm5almi5lthib6jm
Changes of functional connectivity in the left frontoparietal network following aphasic stroke
2014
Frontiers in Behavioral Neuroscience
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We enrolled 13 aphasic patients who had undergone a stroke in the left hemisphere and age-, gender-, educational level-matched controls and analyzed the data by integrating independent component analysis ...
Resting state functional magnetic resonance imaging (fMRI) and clinical evaluation of language function were assessed at two stages: 1 and 2 months after stroke onset. ...
ACKNOWLEDGMENTS We deeply thank Hsiao-Ying Wey, Xiaoyan Chen, and Javeria Ali Hashmi in the Department of Psychiatry, Massachusetts General Hospital for their valuable help in data analysis. ...
doi:10.3389/fnbeh.2014.00167
pmid:24860452
pmcid:PMC4026698
fatcat:qqk4zfp75zdixo3mqckpnsieeq
Synchrony Between Default-Mode and Sensorimotor Networks Facilitates Motor Function in Stroke Rehabilitation: A Pilot fMRI Study
2020
Frontiers in Neuroscience
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However, whether between-network interactions facilitate the neuroplasticity after stroke rehabilitation remains a mystery. ...
After stroke onset, persistent physical practice or exercise in the rehabilitation procedure reorganizes neural assembly for reducing motor deficits, known as neuroplasticity. ...
The fMRI data were acquired using a Siemens TIM Trio 3T MRI scanner with a 12-channel head coil. ...
doi:10.3389/fnins.2020.00548
pmid:32655349
pmcid:PMC7325875
fatcat:hajdganp2rbobhzohdatjrwndy
Cerebral blood flow imbalance is associated with motor outcome after pediatric arterial ischemic stroke
2019
PLoS ONE
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This study aims to explore long-term cerebral perfusion balance of vital tissue and its relation to motor outcome after childhood AIS. ...
This was significantly different from peers, who showed balanced laterality indices. There was a significant correlation between laterality indices and manual ability, except in the ACA territory. ...
Acknowledgments The authors thank all the children who participated in the study as well as their parents. ...
doi:10.1371/journal.pone.0223584
pmid:31603919
pmcid:PMC6788710
fatcat:lsbtnj2vufdslekpfvqftpth5i
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