keyword
MENU ▼
Read by QxMD icon Read
search

Brain performance

keyword
https://www.readbyqxmd.com/read/29161785/intraoperative-mri-for-resection-of-intracranial-meningiomas
#1
Shamik Chakraborty, Salvatore Zavarella, Sussan Salas, Michael Schulder
Objective: To examine whether intraoperative MRI can enhance safety and extent of resection of complex intracranial meningiomas, given its positive role in the resection of malignant brain tumors and pituitary tumors. Methods: Over a ten-year period, 70 operations were performed on 66 patients with intracranial meningiomas using the compact, mobile PoleStar N20 iMRI navigation system. A retrospective review was conducted examining patient demographics, surgical characteristics, and outcomes...
November 2017: Journal of Experimental Therapeutics & Oncology
https://www.readbyqxmd.com/read/29161621/human-subthalamic-oscillatory-dynamics-following-somatosensory-stimulation
#2
Saskia Elben, Carlos Trenado, Jan Vesper, Alfons Schnitzler, Lars Wojtecki
OBJECTIVE: Electrical median nerve somatosensory stimulation leads to a distinct modulation of cortical oscillations. Initial high frequency and gamma augmentation, as well as modulation of beta and alpha oscillations have been reported. We aimed at investigating the involvement of the subthalamic nucleus in somatosensory processing by means of local field potential recordings, since recordings during passive movements and peripheral somatosensory stimulation have suggested a prominent role...
October 28, 2017: Clinical Neurophysiology: Official Journal of the International Federation of Clinical Neurophysiology
https://www.readbyqxmd.com/read/29161359/recurrent-processing-of-contour-integration-in-the-human-visual-cortex-as-revealed-by-fmri-guided-tms
#3
Ya Li, Yonghui Wang, Sheng Li
Contour integration is a critical step in visual perception because it groups discretely local elements into perceptually global contours. Previous investigations have suggested that striate and extrastriate visual areas are involved in this mid-level processing of visual perception. However, the temporal dynamics of these areas in the human brain during contour integration is less understood. The present study used functional magnetic resonance imaging-guided transcranial magnetic stimulation (TMS) to briefly disrupt 1 of 2 visual areas (V1/V2 and V3B) and examined the causal contributions of these areas to contour detection...
November 17, 2017: Cerebral Cortex
https://www.readbyqxmd.com/read/29161348/multi-institutional-competing-risks-analysis-of-distant-brain-failure-and-salvage-patterns-after-upfront-radiosurgery-without-whole-brain-radiotherapy-for-brain-metastasis
#4
E McTyre, D Ayala-Peacock, J Contessa, C Corso, V Chiang, C Chung, J Fiveash, M Ahluwalia, R Kotecha, S Chao, A Attia, A Henson, J Hepel, S Braunstein, M Chan
Background: In this study we use a competing risks analysis to assess factors predictive of early salvage whole brain radiotherapy (WBRT) and early death after upfront stereotactic radiosurgery (SRS) alone for brain metastases in an attempt to identify populations that benefit less from upfront SRS. Patients and methods: Patients from eight academic centers were treated with SRS for brain metastasis. Competing risks analysis was performed for distant brain failure (DBF) vs...
November 17, 2017: Annals of Oncology: Official Journal of the European Society for Medical Oncology
https://www.readbyqxmd.com/read/29161113/disseminability-of-computerized-cognitive-training-performance-across-coaches
#5
Ashley S Fournier-Goodnight, Jason M Ashford, Kellie N Clark, Karen Martin-Elbahesh, Kristina K Hardy, Thomas E Merchant, Sima Jeha, Robert J Ogg, Hui Zhang, Lei Wang, Heather M Conklin
Cogmed is a computerized cognitive intervention utilizing coaches who receive standardized instruction in analyzing training indices and tailoring feedback to remotely monitor participant's performance. The goal of this study was to examine adherence, satisfaction, and efficacy of Cogmed across coaches. Survivors of pediatric brain tumors and acute lymphoblastic leukemia (N = 68) were randomized to intervention (Cogmed) or waitlist control. The intervention group was matched with one of two coaches. Cognitive assessments were completed before and after intervention, and participants and caregivers in the intervention group completed satisfaction surveys...
November 21, 2017: Applied Neuropsychology. Child
https://www.readbyqxmd.com/read/29160817/impact-of-high-dose-multi-strain-probiotic-supplementation-on-neurocognitive-performance-and-central-nervous-system-immune-activation-of-hiv-1-infected-individuals
#6
Giancarlo Ceccarelli, Jason M Brenchley, Eugenio Nelson Cavallari, Giuseppe Corano Scheri, Mariangela Fratino, Claudia Pinacchio, Ivan Schietroma, Saeid Najafi Fard, Carolina Scagnolari, Ivano Mezzaroma, Vincenzo Vullo, Gabriella d'Ettorre
BACKGROUND: Gut microbiota has metabolic activity which influences mucosal homeostasis, local and systemic immune responses, and other anatomical systems (i.e., brain). The effects of dysbiosis are still poorly studied in Human Immunodeficiency Virus-1 (HIV-1) positive subjects and insufficient data are available on the impairment of the gut-brain axis, despite neurocognitive disorders being commonly diagnosed in these patients. This study evaluated the impact of a probiotic supplementation strategy on intrathecal immune activation and cognitive performance in combined antiretroviral therapy (cART) treated HIV-1 infected subjects...
November 21, 2017: Nutrients
https://www.readbyqxmd.com/read/29160761/fronto-parietal-coherence-response-to-tdcs-modulation-in-patients-with-disorders-of-consciousness
#7
Yang Bai, Xiaoyu Xia, Yong Wang, Yongkun Guo, Yi Yang, Jianghong He, Xiaoli Li
A transcranial direct current stimulation (tDCS) protocol (2 min, 2 mA, anodal electrode at the left dorsolateral prefrontal cortex and cathodal electrode at the right supraorbital area) was applied in patients with different degrees of disorders of consciousness (DoC). Although previous research indicates that it could improve patients' coma recovery scale-revised (CRS-R) scores, the brain's electrophysiological responses to tDCS are still unclear. Therefore, the present study was performed to explore the underlying brain responses of patients in a minimally conscious state (MCS) and a Unresponsive Wakefulness Syndrome (UWS) to tDCS modulation...
November 21, 2017: International Journal of Neuroscience
https://www.readbyqxmd.com/read/29160740/effects-of-regular-physical-activity-on-the-cognitive-performance-of-type-2-diabetic-patients-a-systematic-review
#8
Natalie Podolski, Klara Brixius, Hans G Predel, Christian Brinkmann
BACKGROUND: Cognitive decline has been shown to be associated with long-term type 2 diabetes mellitus (T2DM). This review analyzes the present literature to ascertain the role of regular physical activity (PA) for the functioning of the diabetic brain. METHODS: PubMed was systematically searched for relevant publications up to July 2017. RESULTS: Four cross-sectional, one longitudinal observational, and nine interventional studies with a total of ∼7000 T2DM subjects are included in this review...
November 21, 2017: Metabolic Syndrome and related Disorders
https://www.readbyqxmd.com/read/29160739/neural-correlates-of-effort-dependent-and-effort-independent-cognitive-fatigue-components-in-patients-with-multiple-sclerosis
#9
Stefan Spiteri, Thomas Hassa, Dolores Claros-Salinas, Christian Dettmers, Mircea Ariel Schoenfeld
BACKGROUND: Among patients with multiple sclerosis (MS), fatigue is the most commonly reported symptom. It can be subdivided into an effort-dependent (fatigability) and an effort-independent component (trait-fatigue). OBJECTIVE: The objective was to disentangle activity changes associated with effort-independent "trait-fatigue" from those associated with effort-dependent fatigability in MS patients. METHODS: This study employed behavioral measures and functional magnetic imaging to investigate neural changes in MS patients associated with fatigue...
November 1, 2017: Multiple Sclerosis: Clinical and Laboratory Research
https://www.readbyqxmd.com/read/29160736/gat3-selective-substrate-l-isoserine-upregulates-gat3-expression-and-increases-functional-recovery-after-a-focal-ischemic-stroke-in-mice
#10
Maria Ek Lie, Emma K Gowing, Nina B Johansen, Nils Ole Dalby, Louise Thiesen, Petrine Wellendorph, Andrew N Clarkson
Ischemic stroke triggers an elevation in tonic GABA inhibition that impairs the ability of the brain to form new structural and functional cortical circuits required for recovery. This stroke-induced increase in tonic inhibition is caused by impaired GABA uptake via the glial GABA transporter GAT3, highlighting GAT3 as a novel target in stroke recovery. Using a photothrombotic stroke mouse model, we show that GAT3 protein levels are decreased in peri-infarct tissue from 6 h to 42 days post-stroke. Prior studies have shown that GAT substrates can increase GAT surface expression...
January 1, 2017: Journal of Cerebral Blood Flow and Metabolism
https://www.readbyqxmd.com/read/29160735/up-regulation-of-wnt-%C3%AE-catenin-expression-is-accompanied-with-vascular-repair-after-traumatic-brain-injury
#11
Arjang Salehi, Amandine Jullienne, Mohsen Baghchechi, Mary Hamer, Mark Walsworth, Virginia Donovan, Jiping Tang, John H Zhang, William J Pearce, Andre Obenaus
Recent data suggest that repairing the cerebral vasculature after traumatic brain injury (TBI) may help to improve functional recovery. The Wnt/β-catenin signaling pathway promotes blood vessel formation during vascular development, but its role in vascular repair after TBI remains elusive. In this study, we examined how the cerebral vasculature responds to TBI and the role of Wnt/β-catenin signaling in vascular repair. We induced a moderate controlled cortical impact in adult mice and performed vessel painting to visualize the vascular alterations in the brain...
January 1, 2017: Journal of Cerebral Blood Flow and Metabolism
https://www.readbyqxmd.com/read/29160692/s100a9-protein-aggregates-boost-hippocampal-glutamate-modifying-monoaminergic-neurochemistry-a-glutamate-antibody-sensitive-outcome-on-alzheimer-like-memory-decline
#12
Marina A Gruden, Tatiana V Davydova, Vladimir S Kudrin, Chao Wang, Victor B Narkevich, Ludmilla A Morozova-Roche, Robert D E Sewell
Alzheimer's disease (AD) involves dementia conceivably arising from integrated inflammatory processes, amyloidogenesis and neuronal apoptosis. Glutamate can also cause neuronal death via excitotoxicity and this is similarly implicated in some neurological diseases. The aim was to examine treatment with in vitro generated pro-inflammatory protein S100A9 aggregate species alone or with glutamate antibodies (Glu-Abs) on Morris water maze (MWM) spatial learning and memory performance in 12-month old mice. Amino acid and monoamine cerebral neurotransmitter metabolic changes were concurrently monitored...
November 21, 2017: ACS Chemical Neuroscience
https://www.readbyqxmd.com/read/29160691/bioinspired-tribotronic-resistive-switching-memory-for-self-powered-memorizing-mechanical-stimuli
#13
Yihui Sun, Xin Zheng, Xiaoqin Yan, Qingliang Liao, Shuo Liu, Guangjie Zhang, Yong Li, Yue Zhang
Haptic memory, from the interaction of skin and brain, can not only perceive external stimuli but also memorize it after removing the external stimuli. For the mimicry of human sensory memory, a self-powered artificial tactile memorizing system were developed by coupling bionic electronic skin and nonvolatile RRAM. The tribotronic nanogenerator is utilized as electronic skin to transform the touching signal into electric pulse, which will be programmed into the artificial brain: RRAM. Owing to the advanced structural designs and accurately parameter matching, including the output voltages and the resistances in different resistive states, the artificial brain can be operated at self-powered mode to memorize the touch stimuli with the responsivity up to 2000%...
November 21, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29160546/cortical-blindness-secondary-to-posterior-reversible-encephalopathy-syndrome-recovered-by-successful-blood-pressure-management
#14
José Manuel Abalo-Lojo, Sandra Baleato-González, Francisco Gonzalez
We report a case of cortical blindness secondary to posterior leukoencephalopathy syndrome, which was successfully treated by blood pressure management. A 66-year-old white man presented at the emergency room complaining of severe frontal headache, disorientation, and progressive blurred vision. The initial physical examination disclosed a blood pressure of 200/176 mmHg. One hour later the patient exhibited mental confusion and bilateral blindness. Computed tomography and magnetic resonance imaging were performed, and a systemic workup was conducted, resulting in a diagnosis of posterior leukoencephalopathy syndrome...
September 2017: Arquivos Brasileiros de Oftalmologia
https://www.readbyqxmd.com/read/29160336/relationship-between-the-caregiver-s-report-on-the-patient-s-spontaneous-speech-and-the-brief-aphasia-evaluation
#15
Nora Silvana Vigliecca
PURPOSE: To study the relationship between the caregiver's perception about the patient's impairment in spontaneous speech, according to an item of four questions administered by semi-structured interview, and the patient's performance in the Brief Aphasia Evaluation (BAE). METHODS: 102 right-handed patients with focal brain lesions of different types and location were examined. BAE is a valid and reliable instrument to assess aphasia. The caregiver's perception was correlated with the item of spontaneous speech, the total score and the three main factors of the BAE: Expression, Comprehension and Complementary factors...
November 9, 2017: CoDAS
https://www.readbyqxmd.com/read/29160331/primum-non-nocere-or-primum-facere-meliorem-hacking-the-brain-in-the-21st-century
#16
Lucas Borrione, Andre R Brunoni
Transcranial direct current stimulation (tDCS) is a non-invasive brain stimulation technique that modulates cortical excitability. It is devoid of serious adverse events and exerts variable effects on cognition, with several research findings suggesting that it can improve memory, verbal and mathematical skills. Because tDCS devices are low-cost, portable and relatively easy to assemble, they have become available outside of the medical setting and used for non-medical ("cosmetic") purposes by laypersons. In this sense, tDCS has become a popular technique aiming to improve cognition and the achievement of a better performance not only at work, but also in other fields such as sports, leisure activities (video games) and even the military...
November 13, 2017: Trends in Psychiatry and Psychotherapy
https://www.readbyqxmd.com/read/29159915/performance-of-a-hybrid-monte-carlo-pencil-beam-dose-algorithm-for-proton-therapy-inverse-planning
#17
Ana María Barragán Montero, Kevin Souris, Daniel Sánchez Parcerisa, Edmond Sterpin, John Aldo Lee
PURPOSE: Analytical algorithms have a limited accuracy when modelling very heterogeneous tumor sites. This work addresses the performance of a hybrid dose optimizer that combines both Monte Carlo (MC) and pencil beam (PB) dose engines to get the best trade-off between speed and accuracy for proton therapy plans. METHODS: The hybrid algorithm calculates the optimal spot weights (w) by means of an iterative optimization process where the dose at each iteration is computed by using a precomputed dose influence matrix based on the conventional PB plus a correction term c obtained from a MC simulation...
November 21, 2017: Medical Physics
https://www.readbyqxmd.com/read/29159775/toxic-effects-of-phytol-and-retinol-on-human-glioblastoma-cells-are-associated-with-modulation-of-cholesterol-and-fatty-acid-biosynthetic-pathways
#18
Gustavo Facchini, Raffaela Silvestre Ignarro, Erika Rodrigues-Silva, André Schwambach Vieira, Iscia Lopes-Cendes, Roger Frigério Castilho, Fabio Rogerio
Glioblastoma (GBM) is the most common primary brain tumor. Genetic mutations may reprogram the metabolism of neoplastic cells. Particularly, alterations in cholesterol and fatty acid biosynthetic pathways may favor biomass synthesis and resistance to therapy. Therefore, compounds that interfere with those pathways, such as phytol (PHY) and retinol (RET), may be appropriate for cytotoxic approaches. We tested the effect of PHY or RET on the viability of human GBM cell lines (U87MG, A172 and T98G). Since the compounds showed a dose-dependent cytotoxic effect, additional analyses were performed with IC50 values...
November 20, 2017: Journal of Neuro-oncology
https://www.readbyqxmd.com/read/29159706/alcoholism-detection-by-data-augmentation-and-convolutional-neural-network-with-stochastic-pooling
#19
Shui-Hua Wang, Yi-Ding Lv, Yuxiu Sui, Shuai Liu, Su-Jing Wang, Yu-Dong Zhang
Alcohol use disorder (AUD) is an important brain disease. It alters the brain structure. Recently, scholars tend to use computer vision based techniques to detect AUD. We collected 235 subjects, 114 alcoholic and 121 non-alcoholic. Among the 235 image, 100 images were used as training set, and data augmentation method was used. The rest 135 images were used as test set. Further, we chose the latest powerful technique-convolutional neural network (CNN) based on convolutional layer, rectified linear unit layer, pooling layer, fully connected layer, and softmax layer...
November 17, 2017: Journal of Medical Systems
https://www.readbyqxmd.com/read/29159664/dual-roles-of-the-hippocampus-and-intraparietal-sulcus-in-network-integration-and-segregation-support-scene-recognition
#20
Xin Hao, Xu Wang, Yiying Song, Xiangzhen Kong, Jia Liu
Effectively recognizing surroundings is a critical ability in human navigation. Previous neuroimaging studies have depicted distributed brain regions underpinning spatial navigation, but little is known about how these regions are formed into the navigation network (NN) supporting scene recognition. In this study, we addressed this issue by using a voxel-based global functional connectivity method to characterize the integration (i.e., within-network connectivity, WNC) of the NN and its segregation (i.e., between-network connectivity, BNC) from non-NN networks...
November 20, 2017: Brain Structure & Function
keyword
keyword
85191
1
2
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"