Read by QxMD icon Read

Stroke, brain, behavior

Qian Lu, Jihong Wang, Junshu Jiang, Shengnan Wang, Qilan Jia, Yue Wang, Weiping Li, Qin Zhou, Li Lv, Qingwei Li
BACKGROUND: The RGD-toxin protein Lj-RGD3 is a naturally occurring 118 amino acid peptide that can be obtained from the salivary gland of the Lampetra japonica fish. This unique peptide contains 3 RGD (Arg-Gly-Asp) motifs in its primary structure. Lj-RGD3 is available in recombinant form (rLj-RGD3) and can be produced in large quantities using DNA recombination techniques. The pharmacology of the three RGD motif-containing peptides has not been studied. This study investigated the protective effects of rLj-RGD3, a novel polypeptide, against ischemia/reperfusion-induced damage to the brain caused by middle cerebral artery occlusion (MCAO) in a rat stroke model...
2016: PloS One
Anthony R Mawson, Nola T Radford, Binu Jacob
Stuttering affects about 1% of the general population and from 8 to 11% of children. The onset of persistent developmental stuttering (PDS) typically occurs between 2 and 4 years of age. The etiology of stuttering is unknown and a unifying hypothesis is lacking. Clues to the pathogenesis of stuttering include the following observations: PDS is associated with adverse perinatal outcomes and birth-associated trauma; stuttering can recur or develop in adulthood following traumatic events such as brain injury and stroke; PDS is associated with structural and functional abnormalities in the brain associated with speech and language; and stuttering resolves spontaneously in a high percentage of affected children...
October 18, 2016: European Neurology
Antonello Baldassarre, Lenny E Ramsey, Joshua S Siegel, Gordon L Shulman, Maurizio Corbetta
PURPOSE OF REVIEW: An important challenge in neurology is identifying the neural mechanisms underlying behavioral deficits after brain injury. Here, we review recent advances in understanding the effects of focal brain lesions on brain networks and behavior. RECENT FINDINGS: Neuroimaging studies indicate that the human brain is organized in large-scale resting state networks (RSNs) defined via functional connectivity, that is the temporal correlation of spontaneous activity between different areas...
October 5, 2016: Current Opinion in Neurology
Joachim Liepert
PURPOSE OF REVIEW: This article evaluates whether specific drugs are able to facilitate motor recovery after stroke or improve the level of consciousness, cognitive, or behavioral symptoms after traumatic brain injury. RECENT FINDINGS: After stroke, serotonin reuptake inhibitors can enhance restitution of motor functions in depressed as well as in nondepressed patients. Erythropoietin and progesterone administered within hours after moderate to severe traumatic brain injury failed to improve the outcome...
September 28, 2016: Current Opinion in Neurology
Jéssica Elias Vicentini, Marina Weiler, Sara Regina Meira Almeida, Brunno Machado de Campos, Lenise Valler, Li Min Li
Depression and anxiety symptoms are common after stroke and associated to reduction in quality of life and poor physical and social outcomes. The Default Mode Network (DMN) plays an important role in the emotional processing. We investigated whether these symptoms are associated to a disruption of DMN functional connectivity in the first month after stroke. Thirty-four subacute ischemic stroke patients were submitted to: 1) behavioral assessment through Beck Depression Inventory (BDI), Beck Anxiety Inventory (BAI) and Structured Clinical Interview for DSM Disorders; 2) neuropsychological assessment using Mini Mental State Examination and Montreal Cognitive Assessment; 3) resting state functional magnetic resonance imaging acquisition using a 3 T scanner (Philips Achieva)...
October 14, 2016: Brain Imaging and Behavior
Marco Bacigaluppi, Gianluca Luigi Russo, Luca Peruzzotti-Jametti, Silvia Rossi, Stefano Sandrone, Erica Butti, Roberta De Ceglia, Andrea Bergamaschi, Caterina Motta, Mattia Gallizioli, Valeria Studer, Emanuela Colombo, Cinthia Farina, Giancarlo Comi, Letterio Salvatore Politi, Luca Muzio, Claudia Villani, Roberto William Invernizzi, Dirk Matthias Hermann, Diego Centonze, Gianvito Martino
: Ischemic stroke is the leading cause of disability, but effective therapies are currently widely lacking. Recovery from stroke is very much dependent on the possibility to develop treatments able to both halt the neurodegenerative process as well as to foster adaptive tissue plasticity. Here we show that ischemic mice treated with neural precursor cell (NPC) transplantation had on neurophysiological analysis, early after treatment, reduced presynaptic release of glutamate within the ipsilesional corticospinal tract (CST), and an enhanced NMDA-mediated excitatory transmission in the contralesional CST...
October 12, 2016: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
Ruihe Lin, Jingli Cai, Eric W Kostuk, Robert Rosenwasser, Lorraine Iacovitti
BACKGROUND: Dimethyl fumarate (DMF), working via its metabolite monomethylfumarate (MMF), acts as a potent antioxidant and immunomodulator in animal models of neurologic disease and in patients with multiple sclerosis. These properties and their translational potential led us to investigate whether DMF/MMF could also protect at-risk and/or dying neurons in models of ischemic stroke in vitro and in vivo. Although the antioxidant effects have been partially addressed, the benefits of DMF immunomodulation after ischemic stroke still need to be explored...
October 13, 2016: Journal of Neuroinflammation
Radhika Patnala, Thiruma V Arumugam, Neelima Gupta, S Thameem Dheen
Cerebral ischemia leads to neuroinflammation and activation of microglia which further contribute to stroke pathology. Understanding regulation of microglial activation will aid in the development of therapeutic strategies that mitigate microglia-mediated neurotoxicity in neuropathologies, including ischemia. In this study, we investigated the epigenetic regulation of microglial activation by studying histone modification histone 3-lysine 9-acetylation (H3K9ac) and its regulation by histone deacetylase (HDAC) inhibitors...
October 8, 2016: Molecular Neurobiology
Gustavo José Luvizutto, Gabriela Rizzo Soares Rizzati, Marcelo Ortolani Fogaroli, Rodrigo Thomazi Rodrigues, Priscila Watson Ribeiro, Hélio Rubens de Carvalho Nunes, Gabriel Pereira Braga, Rafael Dalle Molle da Costa, Silméia Garcia Zanati Bazan, Luiz Antônio de Lima Resende, Adriana Bastos Conforto, Rodrigo Bazan
BACKGROUND: Unilateral spatial neglect (USN) is characterized by the inability to report or respond to people or objects that are presented in the spatial hemisphere that is contralateral to the lesioned hemisphere of the brain. USN has been associated with poor functional outcomes and long stays in hospitals and rehabilitation centers. Noninvasive brain stimulation, such as transcranial direct current stimulation (tDCS), has been used in people who have been affected by USN after stroke...
October 3, 2016: Trials
Brittany M Young, Julie M Stamm, Jie Song, Alexander B Remsik, Veena A Nair, Mitchell E Tyler, Dorothy F Edwards, Kristin Caldera, Justin A Sattin, Justin C Williams, Vivek Prabhakaran
Background: Brain-computer interface (BCI) devices are being investigated for their application in stroke rehabilitation, but little is known about how structural changes in the motor system relate to behavioral measures with the use of these systems. Objective: This study examined relationships among diffusion tensor imaging (DTI)-derived metrics and with behavioral changes in stroke patients with and without BCI training. Methods: Stroke patients (n = 19) with upper extremity motor impairment were assessed using Stroke Impact Scale (SIS), Action Research Arm Test (ARAT), Nine-Hole Peg Test (9-HPT), and DTI scans...
2016: Frontiers in Human Neuroscience
Nurul Ashikin Abdul-Kadir, Norlaili Mat Safri, Mohd Afzan Othman
BACKGROUND: Atrial fibrillation (AF) can cause the formation of blood clots in the heart. The clots may move to the brain and cause a stroke. Therefore, this study analyzed the ECG features of AF and normal sinus rhythm signals for AF recognition which were extracted by using a second-order dynamic system (SODS) concept. OBJECTIVE: To find the appropriate windowing length for feature extraction based on SODS and to determine a machine learning method that could provide higher accuracy in recognizing AF...
November 2016: Computer Methods and Programs in Biomedicine
Mohammad Ashafaq, Heena Tabassum, Suhel Parvez
Oxidative stress and inflammatory responses play a critical contributing factor in cerebral ischemia and reperfusion, which lead to lipid peroxidation and neuronal dysfunction that may represent a target for therapeutic intervention. The present study was aimed to elucidate the neuroprotective effect of tannic acid (TA), a natural polyphenol with potential antioxidant and antiinflammatory properties on middle cerebral artery occlusion (MCAO) model in rats. To test this hypothesis, male Wistar rats were pretreated with TA (50 mg/kg b...
September 27, 2016: Molecular Neurobiology
Liesjet Van Dokkum, Emmanuelle Le Bars, Denis Mottet, Alain Bonafe, Nicolas Menjot de Champfleur, Isabelle Laffont
OBJECTIVE: After stroke, the less affected upper-limb shows slight but substantial and longterm motor deficits [1]. Kinematically, this is reflected by an increased segmentation of movements. Here, we aim to define how these changes in behavior are accompanied by changes in brain activation. MATERIAL/PATIENTS AND METHODS: Twenty-one sub-acute post-stroke patients with a first-ever unilateral ischemic stroke of the middle cerebral artery participated in this study twice: within the first 6 weeks post-stroke and after 6 weeks of rehabilitation...
September 2016: Annals of Physical and Rehabilitation Medicine
Carole Vuillerot, Mickael Dinomais, Stephane Marret, Stephane Chabrier, Thierry Debillon
Neonatal arterial ischemic stroke (NAIS) affects one child in 6-17 100,000-birth term neonates, most of these children will keep long-term motor and cognitive impairment. In 2014, initiated by the French Center for Pediatric Stroke in association with the French Society of Neonatology, a steering committee was created to propose clinical guidelines after NAIS. From all the relevant questions, the importance is given to long-term outcomes after a NAIS with a need for a better description of motor and cognitive outcomes after a NAIS in order to propose a more consensual monitoring for these children to improve their management...
September 2016: Annals of Physical and Rehabilitation Medicine
Gerard G Fluet, Jigna Patel, Qinyin Qiu, Matthew Yarossi, Supriya Massood, Sergei V Adamovich, Eugene Tunik, Alma S Merians
PURPOSE: The complexity of upper extremity (UE) behavior requires recovery of near normal neuromuscular function to minimize residual disability following a stroke. This requirement places a premium on spontaneous recovery and neuroplastic adaptation to rehabilitation by the lesioned hemisphere. Motor skill learning is frequently cited as a requirement for neuroplasticity. Studies examining the links between training, motor learning, neuroplasticity, and improvements in hand motor function are indicated...
September 27, 2016: Disability and Rehabilitation
Sheldon L Reeves, Kelsey E Fleming, Lin Zhang, Annalisa Scimemi
Grooming is a complex and robust innate behavior, commonly performed by most vertebrate species. In mice, grooming consists of a series of stereotyped patterned strokes, performed along the rostro-caudal axis of the body. The frequency and duration of each grooming episode is sensitive to changes in stress levels, social interactions and pharmacological manipulations, and is therefore used in behavioral studies to gain insights into the function of brain regions that control movement execution and anxiety. Traditional approaches to analyze grooming rely on manually scoring the time of onset and duration of each grooming episode, and are often performed on grooming episodes triggered by stress exposure, which may not be entirely representative of spontaneous grooming in freely-behaving mice...
September 2016: PLoS Computational Biology
Adrian Wong, Alexander Y L Lau, Jie Yang, Zhaolu Wang, Wenyan Liu, Bonnie Y K Lam, Lisa Au, Lin Shi, Defeng Wang, Winnie C W Chu, Yun-Yun Xiong, Eugene S K Lo, Lorraine S N Law, Thomas W H Leung, Linda C W Lam, Anne Y Y Chan, Yannie O Y Soo, Eric Y L Leung, Lawrence K S Wong, Vincent C T Mok
BACKGROUND: The objectives of this study are 1) to examine the frequencies of neuropsychiatric symptom clusters in patients with stroke or transient ischemic attack (TIA) by cognitive level and stroke subtype; and 2) to evaluate effect of demographic, clinical, and neuroimaging measures of chronic brain changes and amyloid upon neuropsychiatric symptom clusters. METHODS: Hospital-based, cross-sectional study. 518 patients were administered the Neuropsychiatric Inventory (NPI) 3-6 months post index admission...
2016: PloS One
Mikko T Huuskonen, Sanna Loppi, Hiramani Dhungana, Velta Keksa-Goldsteine, Sighild Lemarchant, Paula Korhonen, Sara Wojciechowski, Eveliina Pollari, Piia Valonen, Juho Koponen, Akihiko Takashima, Gary Landreth, Gundars Goldsteins, Tarja Malm, Jari Koistinaho, Katja M Kanninen
Stroke is a highly debilitating, often fatal disorder for which current therapies are suitable for only a minor fraction of patients. Discovery of novel, effective therapies is hampered by the fact that advanced age, primary age-related tauopathy or comorbidities typical to several types of dementing diseases are usually not taken into account in preclinical studies, which predominantly use young, healthy rodents. Here we investigated for the first time the neuroprotective potential of bexarotene, an FDA-approved agent, in a co-morbidity model of stroke that combines high age and tauopathy with thromboembolic cerebral ischemia...
2016: Scientific Reports
Nia M Harris, Rodney Ritzel, Nikolas Mancini, Yuhang Jiang, Xiang Yi, Devika S Manickam, William A Banks, Alexander V Kabanov, Louise D McCullough, Rajkumar Verma
BACKGROUND: Low levels of brain-derived neurotrophic factor (BDNF) are linked to delayed neurological recovery, depression, and cognitive impairment following stroke. Supplementation with BDNF reverses these effects. Unfortunately, systemically administered BDNF in its native form has minimal therapeutic value due to its poor blood brain barrier permeability and short serum half-life. In this study, a novel nano-particle polyion complex formulation of BDNF (nano-BDNF) was administered to mice after experimental ischemic stroke...
September 13, 2016: Pharmacology, Biochemistry, and Behavior
Bruce H Dobkin
PURPOSE OF REVIEW: Rehabilitation trials and postacute care to lessen impairments and disability after stroke, spinal cord injury, and traumatic brain injury almost never include training to promote long-term self-management of skills practice, strengthening and fitness. Without behavioral training to develop self-efficacy, clinical trials, and home-based therapy may fail to show robust results. RECENT FINDINGS: Behavioral theories about self-management and self-efficacy for physical activity have been successfully incorporated into interventions for chronic diseases, but rarely for neurologic rehabilitation...
September 6, 2016: Current Opinion in Neurology
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"