Behavioral deficits in left hemispatial neglect are related to a reduction of spontaneous neuronal activity in the right superior parietal lobule

Publication date: Available online 20 January 2020Source: NeuropsychologiaAuthor(s): Björn Machner, Janina von der Gablentz, Martin Göttlich, Wolfgang Heide, Christoph Helmchen, Andreas Sprenger, Thomas F. MünteAbstractFocal brain lesions may induce dysfunctions in distant brain regions leading to behavioral impairments. Based on this concept of ‘diaschisis’, spatial neglect following stroke has been related to structural damage of the right-lateralized ventral attention network (VAN) and disrupted inter-hemispheric functional connectivity (FC) in the bilateral dorsal attention network (DAN). We questioned whether neglect-related behavioral deficits may be determined by local dysfunction of a specific region within these brain networks.We investigated acute right-hemisphere stroke patients with left hemispatial neglect using resting-state functional MRI, neuropsychological tests of spatial attention and clinical assessment of neglect-related functional disability. In addition to conventional FC analyses between different cortical regions of interest (ROIs) in the DAN/VAN, we extracted the fractional amplitude of low frequency fluctuations (fALFF) from each ROI as a marker of regional spontaneous neuronal activity. Although DAN regions (as opposed to the VAN regions) were largely spared from structural brain damage, they exhibited a significant reduction of inter-hemispheric FC. However, significant fMRI-behavior correlations were revealed specifical...
Source: Neuropsychologia - Category: Neurology Source Type: research

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Publication date: Available online 20 February 2020Source: The LancetAuthor(s): Michael D Hill, Mayank Goyal, Bijoy K Menon, Raul G Nogueira, Ryan A McTaggart, Andrew M Demchuk, Alexandre Y Poppe, Brian H Buck, Thalia S Field, Dar Dowlatshahi, Brian A van Adel, Richard H Swartz, Ruchir A Shah, Eric Sauvageau, Charlotte Zerna, Johanna M Ospel, Manish Joshi, Mohammed A Almekhlafi, Karla J Ryckborst, Mark W LowerisonSummaryBackgroundNerinetide, an eicosapeptide that interferes with post-synaptic density protein 95, is a neuroprotectant that is effective in preclinical stroke models of ischaemia-reperfusion. In this trial, we ...
Source: The Lancet - Category: General Medicine Source Type: research
FRIDAY, Feb. 21, 2020 -- Ambulances outfitted as " mobile stroke treatment units " provide faster treatment and reduce patients'risk of severe disability and death, German researchers report. The new study examined the use of three mobile stroke...
Source: Drugs.com - Daily MedNews - Category: General Medicine Source Type: news
Traumatic brain injury is a common cause of disability worldwide. In fact, trauma is the second most common cause of death and disability, still today. Traumatic brain injury affects nearly 475 000 children in the United States alone. Globally it is estimated that nearly 2 million people are affected by traumatic brain injuries every year. The mechanism of injury differs between countries in the developing world, where low velocity injuries and interpersonal violence dominates, and high-income countries where high velocity injuries are more common. Traumatic brain injury is not only associated with acute problems, but pati...
Source: Frontiers in Neurology - Category: Neurology Source Type: research
In this study, we established anin vivo middle cerebral artery occlusion (MCAO) model in mice. The expression level of miR-532-5p, neurological score, infarct area, neuronal apoptosis, and phosphoinositide 3-kinase (PI3K)/Akt signaling pathway-related molecules were examined. Low miR-532-5p levels and high phosphatase and tensin homolog deleted on chromosome 10 (PTEN) levels were detected in the mouse MCAO model. MiR-532-5p overexpression improved neurological dysfunction, reduced the infarct area, attenuated neuronal injury and apoptosis, and promoted the activation of the PI3K/Akt signaling pathway in MCAO mice. In vitro...
Source: Metabolic Brain Disease - Category: Neurology Source Type: research
ConclusionImaging of thrombus can be used as an aseessment tool to predict the outcomes and it needs further studies in the future.
Source: Neurological Sciences - Category: Neurology Source Type: research
Publication date: 19 February 2020Source: Neuron, Volume 105, Issue 4Author(s): Silvestro Micera, Matteo Caleo, Carmelo Chisari, Friedhelm C. Hummel, Alessandra PedrocchiStroke is one of the leading causes of long-term disability. Advanced technological solutions (“neurotechnologies”) exploiting robotic systems and electrodes that stimulate the nervous system can increase the efficacy of stroke rehabilitation. Recent studies on these approaches have shown promising results. However, a paradigm shift in the development of new approaches must be made to significantly improve the clinical outcomes of neurotechnolo...
Source: Neuron - Category: Neuroscience Source Type: research
(American Heart Association) Stroke patients were more likely to get clot-busting treatment and received it faster if treatment started in a mobile stroke unit, an ambulance specially equipped to provide treatment.Those treated in a mobile stroke unit had less post-stroke disability, a German study found.
Source: EurekAlert! - Medicine and Health - Category: International Medicine & Public Health Source Type: news
Publication date: March 2020Source: The Lancet Neurology, Volume 19, Issue 3Author(s): Hugues Chabriat, Claudio L Bassetti, Ute Marx, Marie-Laure Audoli-Inthavong, Aurore Sors, Estelle Lambert, Marine Wattez, Dirk M Hermann, Katharina ALTHAUS, Sergi AMARO, Hee-Joon BAE, Zbigniew BAK, Leonardo BARBARINI, Pietro BASSI, Rodrigo BAZAN, Daniel BERECZKI, Tomasz BERKOWICZ, Joerg BERROUSCHOT, Dylan BLACQUIERE, Waldemar BROLASummaryBackgroundS44819, a selective GABAA α5 receptor antagonist, reduces tonic post-ischaemic inhibition of the peri-infarct cortex. S44819 improved stroke recovery in rodents and increased cortical exc...
Source: The Lancet Neurology - Category: Neurology Source Type: research
We examined the current studies on the efficiency and effectiveness of the robot interventions and produced a taxonomy of the review. An original finding of the current robotics in rehabilitation landscaping are critical presented with recommendations and concluding remarks concerning interdisciplinary impact. PMID: 32067201 [PubMed - in process]
Source: Advances in Experimental Medicine and Biology - Category: Research Tags: Adv Exp Med Biol Source Type: research
Conclusion: VR appears to be a promising therapeutic technology for UL motor rehabilitation in patients with stroke. PMID: 32064964 [PubMed - as supplied by publisher]
Source: Brain Injury - Category: Neurology Tags: Brain Inj Source Type: research
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