Attention and Motor Network Connectivity Predicts Spatial Neglect after Right Brain Stroke

2018 ◽  
Vol 99 (12) ◽  
pp. e192-e193
Author(s):  
Olga Boukrina ◽  
A.M. Barrett ◽  
Soha Saleh ◽  
Amit Chaudhari
Keyword(s):  
Network Connectivity ◽  
Spatial Neglect ◽  
Right Brain ◽  
Motor Network ◽  
Brain Stroke

scholarly journals Structural white-matter connections mediating distinct behavioral components of spatial neglect in right brain-damaged patients

Cortex ◽  
2016 ◽  
Vol 77 ◽  
pp. 54-68 ◽  
Author(s):  
Maarten J. Vaessen ◽  
Arnaud Saj ◽  
Karl-Olof Lovblad ◽  
Markus Gschwind ◽  
Patrik Vuilleumier
Keyword(s):  
White Matter ◽  
Spatial Neglect ◽  
Right Brain

scholarly journals Local GABA concentration is related to network-level resting functional connectivity

eLife ◽  
2014 ◽  
Vol 3 ◽  
Author(s):  
Charlotte J Stagg ◽  
Velicia Bachtiar ◽  
Ugwechi Amadi ◽  
Christel A Gudberg ◽  
Andrei S Ilie ◽  
...  
Keyword(s):  
Functional Connectivity ◽  
Resting State ◽  
Primary Motor Cortex ◽  
Empirical Studies ◽  
Network Connectivity ◽  
Resting State Fmri ◽  
Resonance Spectroscopy ◽  
Resting State Networks ◽  
Inhibitory Neurotransmitter ◽  
Motor Network

Anatomically plausible networks of functionally inter-connected regions have been reliably demonstrated at rest, although the neurochemical basis of these ‘resting state networks’ is not well understood. In this study, we combined magnetic resonance spectroscopy (MRS) and resting state fMRI and demonstrated an inverse relationship between levels of the inhibitory neurotransmitter GABA within the primary motor cortex (M1) and the strength of functional connectivity across the resting motor network. This relationship was both neurochemically and anatomically specific. We then went on to show that anodal transcranial direct current stimulation (tDCS), an intervention previously shown to decrease GABA levels within M1, increased resting motor network connectivity. We therefore suggest that network-level functional connectivity within the motor system is related to the degree of inhibition in M1, a major node within the motor network, a finding in line with converging evidence from both simulation and empirical studies.

scholarly journals Dynamics of brain connectivity after stroke

2019 ◽  
Vol 30 (6) ◽  
pp. 605-623 ◽  
Author(s):  
Adela Desowska ◽  
Duncan L. Turner
Keyword(s):  
Brain Connectivity ◽  
Effective Connectivity ◽  
Network Connectivity ◽  
Connectivity Pattern ◽  
Compensatory Mechanisms ◽  
Neural Structure ◽  
Motor Network ◽  
The Central Nervous System ◽  
Dynamic Time ◽  
The Impact

Abstract Recovery from a stroke is a dynamic time-dependent process, in which the central nervous system reorganises to accommodate for the impact of the injury. The purpose of this paper is to review recent longitudinal studies of changes in brain connectivity after stroke. A systematic review of research papers reporting functional or effective connectivity at two or more time points in stroke patients was conducted. Stroke leads to an early reduction of connectivity in the motor network. With recovery time, the connectivity increases and can reach the same levels as in healthy participants. The increase in connectivity is correlated with functional motor gains. A new, more randomised pattern of connectivity may then emerge in the longer term. In some instances, a pattern of increased connectivity even higher than in healthy controls can be observed, and is related either to a specific time point or to a specific neural structure. Rehabilitation interventions can help improve connectivity between specific regions. Moreover, motor network connectivity undergoes reorganisation during recovery from a stroke and can be related to behavioural recovery. A detailed analysis of changes in connectivity pattern may enable a better understanding of adaptation to a stroke and how compensatory mechanisms in the brain may be supported by rehabilitation.

P82. Motor network connectivity predicts responsiveness to theta-burst stimulation

2015 ◽  
Vol 126 (8) ◽  
pp. e134
Author(s):  
C. Nettekoven ◽  
L.J. Volz ◽  
M. Kutscha ◽  
E.-M. Pool ◽  
S.B. Eickhoff ◽  
...  
Keyword(s):  
Network Connectivity ◽  
Theta Burst Stimulation ◽  
Burst Stimulation ◽  
Motor Network ◽  
Theta Burst

scholarly journals Response Inhibition Deficits and Altered Motor Network Connectivity in the Chronic Phase of Pediatric Traumatic Brain Injury

2017 ◽  
Vol 34 (22) ◽  
pp. 3117-3123 ◽  
Author(s):  
Jaclyn A. Stephens ◽  
Cynthia E. Salorio ◽  
Jerald P. Gomes ◽  
Mary Beth Nebel ◽  
Stewart H. Mostofsky ◽  
...  
Keyword(s):  
Traumatic Brain Injury ◽  
Brain Injury ◽  
Response Inhibition ◽  
Chronic Phase ◽  
Network Connectivity ◽  
Pediatric Traumatic Brain Injury ◽  
Motor Network
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