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Stroke, brain, behavior

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https://www.readbyqxmd.com/read/29055405/traumatic-brain-injury-diabetic-neuropathy-and-altered-psychiatric-health-the-fateful-triangle
#1
Hadi Abou-El-Hassan, Batoul Dia, Khalil Choucair, Stephanie A Eid, Farah Najdi, Lama Baki, Farid Talih, Assaad A Eid, Firas Kobeissy
Traumatic brain injury is a detrimental medical condition particularly when accompanied by diabetes. There are several comorbidities going along with diabetes including, but not limited to, kidney failure, obesity, coronary artery disease, peripheral vascular disease, hypertension, stroke, neuropathies and amputations. Unlike diabetes type 1, diabetes type 2 is more common in adults who simultaneously suffer from other comorbid conditions making them susceptible to repetitive fall incidents and sustaining head trauma...
October 2017: Medical Hypotheses
https://www.readbyqxmd.com/read/29049855/intra-arterial-transplantation-of-human-bone-marrow-mesenchymal-stem-cells-hbmmscs-improves-behavioral-deficits-and-alters-gene-expression-in-rodent-stroke-model
#2
Vibhuti, Rehan Khan, Alpana Sharma, Suman Jain, Sujata Mohanty, Kameshwar Prasad
Stroke is a multi-factorial polygenic disease and is a major cause of death and adult disability. Administration of bone marrow stem cells protects ischemic rat brain by facilitating recovery of neurological functions. But the molecular mechanism of stem cells action and their effect on gene expression is not well explored. In this study, we have transplanted 1× 10(6) human bone marrow mesenchymal stem cells (hBMMSCs) in middle cerebral artery occluded (MCAo) adult male Wistar rats through intracarotid artery route at 24 hours after surgery...
October 19, 2017: Journal of Neurochemistry
https://www.readbyqxmd.com/read/29043143/focal-segmental-glomerulosclerosis-associated-with-mitochondrial-disease
#3
Kenneth Lim, David Steele, Andrew Fenves, Ravi Thadhani, Eliot Heher, Amel Karaa
Primary mitochondrial diseases (MD) are complex, heterogeneous inherited diseases caused by mutations in either the mitochondrial or nuclear DNA. Glomerular diseases in MD have been reported with tRNA mutation m.3243A>G causing a syndrome of mitochondrial encephalomyopathy, lactic acidosis and stroke-like episodes (MELAS). We describe here a case of focal segmental glomerulosclerosis (FSGS) associated with a new tRNA mutation site. A 34-year-old man with a history of living related kidney transplantation, diabetes, hearing loss, and developmental delay presented to the outpatient clinic with complaints of new behavioral difficulties, worsening symptoms, and brain involvement on imaging...
2017: Clin Nephrol Case Stud
https://www.readbyqxmd.com/read/29033331/transcranial-direct-current-stimulation-facilitates-associative-learning-and-alters-functional-connectivity-in-the-primate-brain
#4
Matthew R Krause, Theodoros P Zanos, Bennett A Csorba, Praveen K Pilly, Jaehoon Choe, Matthew E Phillips, Abhishek Datta, Christopher C Pack
There has been growing interest in transcranial direct current stimulation (tDCS), a non-invasive technique purported to modulate neural activity via weak, externally applied electric fields. Although some promising preliminary data have been reported for applications ranging from stroke rehabilitation to cognitive enhancement, little is known about how tDCS affects the human brain, and some studies have concluded that it may have no effect at all. Here, we describe a macaque model of tDCS that allows us to simultaneously examine the effects of tDCS on brain activity and behavior...
October 11, 2017: Current Biology: CB
https://www.readbyqxmd.com/read/29029633/pattern-of-improvement-in-upper-limb-pointing-task-kinematics-after-a-3-month-training-program-with-robotic-assistance-in-stroke
#5
Ophélie Pila, Christophe Duret, François-Xavier Laborne, Jean-Michel Gracies, Nicolas Bayle, Emilie Hutin
BACKGROUND: When exploring changes in upper limb kinematics and motor impairment associated with motor recovery in subacute post stroke during intensive therapies involving robot-assisted training, it is not known whether trained joints improve before non-trained joints and whether target reaching capacity improves before movement accuracy. METHODS: Twenty-two subacute stroke patients (mean delay post-stroke at program onset 63 ± 29 days, M2) underwent 50 ± 17 (mean ± SD) 45-min sessions of robot-assisted (InMotion™) shoulder/elbow training over 3 months, in addition to conventional occupational therapy...
October 13, 2017: Journal of Neuroengineering and Rehabilitation
https://www.readbyqxmd.com/read/29024793/sensorimotor-impairment-of-speech-auditory-feedback-processing-in-aphasia
#6
Roozbeh Behroozmand, Lorelei Phillip, Karim Johari, Leonardo Bonilha, Chris Rorden, Gregory Hickok, Julius Fridriksson
We investigated the brain network involved in speech sensorimotor processing by studying patients with post-stroke aphasia using an altered auditory feedback (AAF) paradigm. We combined lesion-symptom-mapping analysis and behavioral testing to examine the pervasiveness of speech sensorimotor deficits and their relationship with cortical damage. Sixteen participants with aphasia and sixteen neurologically intact individuals completed a speech task under AAF. The task involved producing speech vowel sounds under the real-time pitch-shifted auditory feedback alteration...
October 9, 2017: NeuroImage
https://www.readbyqxmd.com/read/29019939/creating-affording-situations-coaching-through-animate-objects
#7
Chris Baber, Ahmad Khattab, Martin Russell, Joachim Hermsdörfer, Alan Wing
We explore the ways in which animate objects can be used to cue actions as part of coaching in Activities of Daily Living (ADL). In this case, changing the appearance or behavior of a physical object is intended to cue actions which are appropriate for a given context. The context is defined by the intention of the users, the state of the objects and the tasks for which these objects can be used. We present initial design prototypes and simple user trials which explore the impact of different cues on activity...
October 11, 2017: Sensors
https://www.readbyqxmd.com/read/28982330/potential-biomarkers-with-plasma-cortisol-brain-derived-neurotrophic-factor-and-nitrites-in-patients-with-acute-ischemic-stroke
#8
S Casas, A F Perez, M Mattiazzi, J Lopez, A Folgueira, G M Gargiulo-Monachelli, M C Gonzalez Deniselle, A F De Nicola
BACKGROUND: Acute ischemic stroke (AIS) represents an economic challenge for health systems all over the globe. Changes of neuroactive steroids have been found in different neurological diseases. We have previously demonstrated that old patients with AIS show changes of plasma cortisol and estradiol concentrations, in that increased steroid levels are associated with a deterioration of neurological status and a worse cognitive decline. OBJECTIVE: The present study assessed in patients with AIS if changes of behavior, brain-derived neurotrophic factor (BDNF) and nitrites (NO-2) bear a relationship with the degree of hypercortisolism...
October 5, 2017: Current Neurovascular Research
https://www.readbyqxmd.com/read/28971348/cerebral-hypoperfusion-and-other-shared-brain-pathologies-in-ischemic-stroke-and-alzheimer-s-disease
#9
Shuying Dong, Shelly Maniar, Mioara D Manole, Dandan Sun
Newly emerged evidence reveals that ischemic stroke and Alzheimer's disease (AD) share pathophysiological changes in brain tissue including hypoperfusion, oxidative stress, immune exhaustion, and inflammation. A mechanistic link between hypoperfusion and amyloid β accumulation can lead to cell damage as well as to motor and cognitive deficits. This review will discuss decreased cerebral perfusion and other related pathophysiological changes common to both ischemic stroke and AD, such as vascular damages, cerebral blood flow alteration, abnormal expression of amyloid β and tau proteins, as well as behavioral and cognitive deficits...
October 2, 2017: Translational Stroke Research
https://www.readbyqxmd.com/read/28963051/-phenserine-inhibits-neuronal-apoptosis-following-ischemia-reperfusion-injury
#10
Cheng-Fu Chang, Jing-Huei Lai, John Chung-Che Wu, Nigel H Greig, Robert E Becker, Yu Luo, Yen-Hua Chen, Shuo-Jhen Kang, Yung-Hsiao Chiang, Kai-Yun Chen
Stroke commonly leads to adult disability and death worldwide. Its major symptoms are spastic hemiplegia and discordant motion, consequent to neuronal cell death induced by brain vessel occlusion. Acetylcholinesterase (AChE) is upregulated and allied with inflammation and apoptosis after stroke. Recent studies suggest that AChE inhibition ameliorates ischemia-reperfusion injury and has neuroprotective properties. (-)-Phenserine, a reversible AChE inhibitor, has a broad range of actions independent of its AChE properties, including neuroprotective ones...
December 15, 2017: Brain Research
https://www.readbyqxmd.com/read/28956737/beliefs-of-rehabilitation-professionals-towards-guided-self-rehabilitation-contracts-for-post-stroke-hemiparesis
#11
Claire Marsal, Jean-Michel Gracies, Catherine Dean, Serge Mesure, Nicolas Bayle
Purpose To investigate the beliefs of physiotherapy students (ST), professionals (PT) and physicians (MD) about engaging patients with post-stroke hemiparesis into Guided Self-Rehabilitation Contracts (GSC), to increase their exercise intensity and responsibility level. Method A survey examining beliefs about post-stroke rehabilitation was completed by first (n = 95), second (n = 105), and third (n = 48) year STs; PTs (n = 129) and MDs (n = 65) in France. Results The belief about whether a patient may exercise alone varied between the professional groups with more STs and MDs finding it acceptable: 62% of PTs vs...
September 28, 2017: Topics in Stroke Rehabilitation
https://www.readbyqxmd.com/read/28950689/collagenase-induced-rat-intra-striatal-hemorrhage-mimicking-severe-human-intra-striatal-hemorrhage
#12
Li-Chuan Huang, Hock-Kean Liew, Hung-Yu Cheng, Hsiao-Fen Peng, Hui-I Yang, Jon-Son Kuo, Wen-Lin Hsu, Cheng-Yoong Pang
Basal ganglia hemorrhage accounts for approximately 50% of all hemorrhagic strokes. A good rat model that produces severe intra-striatal hemorrhage (ISH) mimicking human severe ISH is lacking. The present study compared the intra-striatal injection of 0.2 U with that of 0.6 U of collagenase in inducing severe ISH in rats. 3T magnetic resonance imaging was used to evaluate brain injuries in terms of hematoma size (volume), midline shift (MLS), and brain edema. This evaluation was further substantiated by determination of behavior and neurologic functions and mortality over 56 h...
October 31, 2017: Chinese Journal of Physiology
https://www.readbyqxmd.com/read/28948448/the-macroscopic-and-microscopic-effect-of-low-frequency-whole-body-vibration-after-cerebral-ischemia-in-rats
#13
Dan Huang, Zhen Yang, Zhenyu Wang, Pu Wang, Yun Qu
Whole body vibration (WBV) has been applied in stroke patients with uncertain effects on motor and sensory dysfunction, and its effects on neurogenesis have not been studied yet. Here, we intended to explore the effects of daily WBV on neurological behavior, brain structure, and neurogenesis after cerebral ischemia in rats for 4 weeks. Results showed that improvements in weight or comprehensive neurological deficits were not significantly different under WBV or control treatment, and the degrees of brain damage and the numbers of necrotic neurons in the ischemic cortex were similar in two groups...
September 25, 2017: Metabolic Brain Disease
https://www.readbyqxmd.com/read/28944694/tissue-plasminogen-activator-based-nanothrombolysis-for-ischemic-stroke
#14
Shan Liu, Xiaozhou Feng, Rong Jin, Guohong Li
Thrombolysis with intravenous tissue plasminogen activator (tPA) is the only FDA approved treatment for patients with acute ischemic stroke, but its use is limited by narrow therapeutic window, selective efficacy, and hemorrhagic complication. In the past two decades, extensive efforts have been undertaken to extend its therapeutic time window and explore alternative thrombolytic agents, but both show little progress. Nanotechnology has emerged as a promising strategy to improve the efficacy and safety of tPA...
September 28, 2017: Expert Opinion on Drug Delivery
https://www.readbyqxmd.com/read/28935697/impact-of-stroke-risk-factors-on-ethnic-stroke-disparities-among-midlife-mexican-americans-and-non-hispanic-whites
#15
Rajiv C Patel, Brisa N Sánchez, Lewis B Morgenstern, Chengwei Li, Lynda D Lisabeth
BACKGROUND AND PURPOSE: We examined the contribution of stroke risk factors to midlife (age 45-59 years) Mexican American and non-Hispanic White ischemic stroke (IS) rate disparities from 2000 to 2010. METHODS: Incident IS cases (n=707) and risk factors were identified from the Brain Attack Surveillance in Corpus Christi Project, Nueces County, TX (2000-2010). US Census data (2000-2010) were used to estimate the population at-risk for IS, and the Behavioral Risk Factor Surveillance System (2000-2010) was used to estimate risk factor prevalence in the stroke-free population...
October 2017: Stroke; a Journal of Cerebral Circulation
https://www.readbyqxmd.com/read/28923161/comparing-the-cognitive-process-of-circular-causality-in-two-patients-with-strokes-through-qualitative-analysis
#16
Seyed Alireza Derakhshanrad, Emily Piven, Bahareh Zeynalzadeh Ghoochani
Walter J. Freeman pioneered the neurodynamic model of brain activity when he described the brain dynamics for cognitive information transfer as the process of circular causality at intention, meaning, and perception (IMP) levels. This view contributed substantially to establishment of the Intention, Meaning, and Perception Model of Neuro-occupation in occupational therapy. As described by the model, IMP levels are three components of the brain dynamics system, with nonlinear connections that enable cognitive function to be processed in a circular causality fashion, known as Cognitive Process of Circular Causality (CPCC)...
October 2017: Nonlinear Dynamics, Psychology, and Life Sciences
https://www.readbyqxmd.com/read/28922851/%C3%AE-endosulfine-arpp-19e-expression-in-a-rat-model-of-stroke
#17
Rupal I Mehta, Natalia Tsymbalyuk, Svetlana Ivanova, Jesse A Stokum, Kyoon Woo, Volodymyr Gerzanich, J Marc Simard
In nutrient restricted environments, the yeast endosulfines Igo1/2 are activated via TORC1 inhibition and function critically to initiate and coordinate the cellular stress response that promotes survival. We examined expression of αEnsa, the mammalian homolog of yeast endosulfines, in rat stroke. Prominent neuronal upregulation of αEnsa was identified in 3 patterns within the ischemic gradient: (1) neurons in GFAP-/HSF1+ cortex showed upregulation and near-complete nuclear translocation of αEnsa protein within hours of ischemic onset; (2) neurons in GFAP+/HSF1+ cortex showed upregulation in cytoplasm and nuclei that persisted for days; (3) neurons in GFAP+/HSF1- cortex showed delayed cytosolic-only upregulation that persisted for days...
October 1, 2017: Journal of Neuropathology and Experimental Neurology
https://www.readbyqxmd.com/read/28919535/altered-gray-matter-volume-cerebral-blood-flow-and-functional-connectivity-in-chronic-stroke-patients
#18
Peifang Miao, Caihong Wang, Peng Li, Sen Wei, Chunshan Deng, Dandan Zheng, Jingliang Cheng
It is entangled connections and intensive functional interactions between cortex and subcortical structures that enable our brain to perform delicate movement, and poses plasticity to recover from stroke. However, it is still unclear how cortical structures and functions change in well-recovered patients from subcortical infarctions in motor pathway. In order to reveal neuroplasticity underlying well-recovered stroke patients, both structural (gray matter volume, GMV) and functional reorganizations (cerebral blood flow, CBF and resting-state functional connectivity, rsFC) were investigated by using multi-modal MRI...
September 14, 2017: Neuroscience Letters
https://www.readbyqxmd.com/read/28917705/long-term-retention-of-ecm-hydrogel-after-implantation-into-a-sub-acute-stroke-cavity-reduces-lesion-volume
#19
Harmanvir Ghuman, Madeline Gerwig, Francesca J Nicholls, Jessie R Liu, Julia Donnelly, Stephen F Badylak, Michel Modo
Salvaging or functional replacement of damaged tissue caused by stroke in the brain remains a major therapeutic challenge. In situ gelation and retention of a hydrogel bioscaffold composed of 8mg/mL extracellular matrix (ECM) can induce a robust invasion of cells within 24h and potentially promote a structural remodeling to replace lost tissue. Herein, we demonstrate a long-term retention of ECM hydrogel within the lesion cavity. A decrease of approximately 32% of ECM volume is observed over 12weeks. Lesion volume, as measured by magnetic resonance imaging and histology, was reduced by 28%, but a battery of behavioral tests (bilateral asymmetry test; footfault; rotameter) did not reveal a therapeutic or detrimental effect of the hydrogel...
November 2017: Acta Biomaterialia
https://www.readbyqxmd.com/read/28914232/combined-rtms-and-virtual-reality-brain-computer-interface-training-for-motor-recovery-after-stroke
#20
Nessa N Johnson, James Carey, Bradley Edelman, Alexander Doud, Andrew Grande, Kamakshi Lakshminarayan, Bin He
OBJECTIVE: Combining repetitive transcranial magnetic stimulation (rTMS) with brain-computer interface (BCI) training can address motor impairment after stroke by down-regulating exaggerated inhibition from the contralesional hemisphere and encouraging ipsilesional activation. The objective was to evaluate the efficacy of combined rTMS+BCI, compared to sham rTMS+BCI, on motor recovery after stroke in subjects with lasting motor paresis. APPROACH: Three stroke subjects approximately one year post-stroke participated in three weeks of combined rTMS (real or sham) and BCI, followed by three weeks of BCI alone...
September 15, 2017: Journal of Neural Engineering
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