keyword
MENU ▼
Read by QxMD icon Read
search

meyers loop

keyword
https://www.readbyqxmd.com/read/28648721/stability-metrics-for-optic-radiation-tractography-towards-damage-prediction-after-resective-surgery
#1
Stephan Meesters, Pauly Ossenblok, Louis Wagner, Olaf Schijns, Paul Boon, Luc Florack, Anna Vilanova, Remco Duits
BACKGROUND: An accurate delineation of the optic radiation (OR) using diffusion MR tractography may reduce the risk of a visual field deficit after temporal lobe resection. However, tractography is prone to generate spurious streamlines, which deviate strongly from neighboring streamlines and hinder a reliable distance measurement between the temporal pole and the Meyer's loop (ML-TP distance). NEW METHOD: Stability metrics are introduced for the automated removal of spurious streamlines near the Meyer's loop...
June 23, 2017: Journal of Neuroscience Methods
https://www.readbyqxmd.com/read/28610960/no-difference-between-noxious-and-innocuous-thermal-stimulation-on-motor-recovery-of-upper-extremity-in-patients%C3%A2-with-acute-stroke-a-randomized-controlled-trial-with%C3%A2-6-month-follow-up
#2
Roxane Lin, Miao-Ju Hsu, Ruey-Tay Lin, Mao-Hsiung Huang, Chia-Lin Koh, Ching-Lin Hsieh, Jau-Hong Lin
BACKGROUND: Thermal stimulation (TS) has been developed and incorporated into stroke rehabilitation. However, whether noxious and innocuous TS induce the same effects on motor function recovery after stroke is still unknown. A comparative study of different temperature combination regimens is needed. OBJECTIVE: To compare the short- and long-term effectiveness between noxious and innocuous TS on motor recovery of upper extremity in patients with acute stroke. DESIGN: Randomized, controlled trial with concealed allocation, intention-to-treat analysis and blinded outcome assessors...
June 10, 2017: PM & R: the Journal of Injury, Function, and Rehabilitation
https://www.readbyqxmd.com/read/28587872/validation-of-an-automated-tractography-method-for-the-optic-radiations-as-a-biomarker-of-visual-acuity-in-neurofibromatosis-associated-optic-pathway-glioma
#3
REVIEW
Peter de Blank, Michael J Fisher, Haley Gittleman, Jill S Barnholtz-Sloan, Chaitra Badve, Jeffrey I Berman
INTRODUCTION: Fractional anisotropy (FA) of the optic radiations has been associated with vision deficit in multiple intrinsic brain pathologies including NF1 associated optic pathway glioma, but hand-drawn regions of interest used in previous tractography methods limit consistency of this potential biomarker. We created an automated method to identify white matter tracts in the optic radiations and compared this method to previously reported hand-drawn tractography. METHOD: Automated tractography of the optic radiation using probabilistic streamline fiber tracking between the lateral geniculate nucleus of the thalamus and the occipital cortex was compared to the hand-drawn method between regions of interest posterior to Meyer's loop and anterior to tract branching near the calcarine cortex...
June 3, 2017: Experimental Neurology
https://www.readbyqxmd.com/read/28587636/recognizing-rna-structural-motifs-in-ht-selex-data-for-ribosomal-protein-s15
#4
Shermin Pei, Betty L Slinger, Michelle M Meyer
BACKGROUND: Proteins recognize many different aspects of RNA ranging from single stranded regions to discrete secondary or tertiary structures. High-throughput sequencing (HTS) of in vitro selected populations offers a large scale method to study RNA-proteins interactions. However, most existing analysis methods require that the binding motifs are enriched in the population relative to earlier rounds, and that motifs are found in a loop or single stranded region of the potential RNA secondary structure...
June 6, 2017: BMC Bioinformatics
https://www.readbyqxmd.com/read/28492588/-a-rare-case-of-intussusception-in-a-seventeen-year-old-boy-diagnosis-management-and-review-of-the-literature
#5
Enrica Rossi, Massimo Basile, Donatella Narese, Noemi Ognibene, Sara Poggesi, Marta Cangelosi, Claudio Defilippi
Intussusception is the most common cause of intestinal obstruction and acute abdomen in the first year of life. Approximately in the 80% of cases intussusception occurs when the last ileal loop is pulled into the cecum, passing through the ileocecal valve, and finally resulting in the displacement of cecum in the upper abdominal. It could be related with mesenteric adenitis because enlarged lymph nodes, together with peristalsis, can serve as "lead point". Other forms of intussusception are ileo-ileal and colo-colic...
April 2017: Recenti Progressi in Medicina
https://www.readbyqxmd.com/read/28470180/associations-of-the-intellectual-disability-gene-myt1l-with-helix-loop-helix-gene-expression-hippocampus-volume-and-hippocampus-activation-during-memory-retrieval
#6
Agnieszka Kepa, Lourdes Martinez Medina, Susanne Erk, Deepak P Srivastava, Alinda Fernandes, Roberto Toro, Sabine Lévi, Barbara Ruggeri, Cathy Fernandes, Franziska Degenhardt, Stephanie H Witt, Andreas Meyer-Lindenberg, Jean-Christophe Poncer, Jean-Luc Martinot, Marie-Laure Paillère Martinot, Christian P Müller, Andreas Heinz, Henrik Walter, Gunter Schumann, Sylvane Desrivières
The fundamental role of the brain-specific myelin transcription factor 1-like (MYT1L) gene in cases of intellectual disability and in the etiology of neurodevelopmental disorders is increasingly recognized. Yet, its function remains under-investigated. Here, we identify a network of helix-loop-helix (HLH) transcriptional regulators controlled by MYT1L, as indicated by our analyses in human neural stem cells and in the human brain. Using cell-based knockdown approaches and microarray analyses we found that (1) MYT1L is required for neuronal differentiation and identified ID1, a HLH inhibitor of premature neurogenesis, as a target...
May 4, 2017: Neuropsychopharmacology: Official Publication of the American College of Neuropsychopharmacology
https://www.readbyqxmd.com/read/28389333/the-thermodynamic-signature-of-ligand-binding-to-histone-deacetylase-like-amidohydrolases-is-most-sensitive-to-the-flexibility-in-the-l2-loop-lining-the-active-site-pocket
#7
Christian Meyners, Andreas Krämer, Özkan Yildiz, Franz-Josef Meyer-Almes
BACKGROUND: The analysis of the thermodynamic driving forces of ligand-protein binding has been suggested to be a key component for the selection and optimization of active compounds into drug candidates. The binding enthalpy as deduced from isothermal titration calorimetry (ITC) is usually interpreted assuming single-step binding of a ligand to one conformation of the target protein. Although successful in many cases, these assumptions are oversimplified approximations of the reality with flexible proteins and complicated binding mechanism in many if not most cases...
April 4, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/28324881/optic-radiation-tractography-and-visual-field-deficits-in-laser-interstitial-thermal-therapy-for-amygdalohippocampectomy-in-patients-with-mesial-temporal-lobe-epilepsy
#8
Dali Yin, John A Thompson, Cornelia Drees, Steven G Ojemann, Lidia Nagae, Victoria S Pelak, Aviva Abosch
BACKGROUND/AIMS: Laser interstitial thermal therapy (LITT) has become an alternative to open-resective surgery for refractory mesial temporal lobe epilepsy (MTLE). Occurrence of visual field defects (VFDs) following open surgery for MTLE is reported at 52-100%. We examined the rate of VFDs following LITT for amygdalohippocampectomy (AHE) and correlated the occurrence of VFDs with damage to the optic radiations, assessed by diffusion tensor tractography (DTI). METHODS: We performed a retrospective analysis of 5 patients who underwent LITT-AHE for medically refractory MTLE...
2017: Stereotactic and Functional Neurosurgery
https://www.readbyqxmd.com/read/27951649/crystal-structure-of-a-histone-deacetylase-homologue-from-pseudomonas-aeruginosa
#9
Andreas Krämer, Thomas Wagner, Özkan Yildiz, Franz-Josef Meyer-Almes
Despite the recently growing interest in the acetylation of lysine residues by prokaryotic enzymes, the underlying biological function is still not well understood. Deacetylation is accomplished by proteins that belong to the histone deacetylase (HDAC) superfamily. In this report, we present the first crystal structure of PA3774, a histone deacetylase homologue from the human pathogen Pseudomonas aeruginosa that shares a high degree of homology with class IIb HDACs. We determined the crystal structure of the ligand-free enzyme and protein-ligand complexes with a trifluoromethylketone inhibitor and the reaction product acetate...
December 13, 2016: Biochemistry
https://www.readbyqxmd.com/read/27913638/ms23-a-master-basic-helix-loop-helix-factor-regulates-the-specification-and-development-of-tapetum-in-maize
#10
Guo-Ling Nan, Jixian Zhai, Siwaret Arikit, Darren Morrow, John Fernandes, Lan Mai, Nhi Nguyen, Blake C Meyers, Virginia Walbot
Successful male gametogenesis involves orchestration of sequential gene regulation for somatic differentiation in pre-meiotic anthers. We report here the cloning of Male Sterile23 (Ms23), encoding an anther-specific predicted basic helix-loop-helix (bHLH) transcription factor required for tapetal differentiation; transcripts localize initially to the precursor secondary parietal cells then predominantly to daughter tapetal cells. In knockout ms23-ref mutant anthers, five instead of the normal four wall layers are observed...
December 2, 2016: Development
https://www.readbyqxmd.com/read/27895550/closed-loop-task-difficulty-adaptation-during-virtual-reality-reach-to-grasp-training-assisted-with-an-exoskeleton-for-stroke-rehabilitation
#11
Florian Grimm, Georgios Naros, Alireza Gharabaghi
Stroke patients with severe motor deficits of the upper extremity may practice rehabilitation exercises with the assistance of a multi-joint exoskeleton. Although this technology enables intensive task-oriented training, it may also lead to slacking when the assistance is too supportive. Preserving the engagement of the patients while providing "assistance-as-needed" during the exercises, therefore remains an ongoing challenge. We applied a commercially available seven degree-of-freedom arm exoskeleton to provide passive gravity compensation during task-oriented training in a virtual environment...
2016: Frontiers in Neuroscience
https://www.readbyqxmd.com/read/27871971/speed-bridge-arthroscopic-reinsertion-of-tibial-eminence-fracture-complementary-to-the-adjustable-button-fixation-technique
#12
A Hardy, L Casabianca, O Grimaud, A Meyer
In comminuted fractures of the intercondyloid eminence of the tibial spine, the quality of the reduction and the arthroscopic fixation, notably adjustable suture button fixation, is sometimes disappointing with reduction defects of the anterior bone block. In the Speed-Bridge technique, the two traction sutures of the adjustable button fixation are replaced with two braided sutures of different colors. After the button is placed above the eminence, reduction is obtained by tightening the loop of the button...
November 18, 2016: Orthopaedics & Traumatology, Surgery & Research: OTSR
https://www.readbyqxmd.com/read/27867131/neuronavigation-based-on-track-density-image-extracted-from-deterministic-high-definition-fiber-tractography
#13
Peng-Hu Wei, Fei Cong, Ge Chen, Ming-Chu Li, Xin-Guang Yu, Yu-Hai Bao
BACKGROUND: Diffusion tensor imaging-based navigation is unable to resolve crossing fibers or to determine with accuracy the fanning, origin, and termination of fibers. It is important to improve the accuracy of localizing white matter fibers for improved surgical approaches. We propose a solution to this problem using navigation based on track density imaging extracted from high-definition fiber tractography (HDFT). CASE DESCRIPTION: A 28-year-old asymptomatic female patient with a left-lateral ventricle meningioma was enrolled in the present study...
February 2017: World Neurosurgery
https://www.readbyqxmd.com/read/27822701/aglh-a-thermophilic-udp-n-acetylglucosamine-1-phosphate-dolichyl-phosphate-glcnac-1-phosphotransferase-initiating-protein-n-glycosylation-pathway-in-sulfolobus-acidocaldarius-is-capable-of-complementing-the-eukaryal-alg7
#14
Benjamin H Meyer, Hosam Shams-Eldin, Sonja-Verena Albers
AglH, a predicted UDP-GlcNAc-1-phosphate:dolichyl phosphate GlcNAc-1-phosphotransferase, is initiating the protein N-glycosylation pathway in the thermoacidophilic crenarchaeon Sulfolobus acidocaldarius. AglH successfully replaced the endogenous GlcNAc-1-phosphotransferase activity of Alg7 in a conditional lethal Saccharomyces cerevisiae strain, in which the first step of the eukaryal protein N-glycosylation process was repressed. This study is one of the few examples of cross-domain complementation demonstrating a conserved polyprenyl phosphate transferase reaction within the eukaryal and archaeal domain like it was demonstrated for Methanococcus voltae (Shams-Eldin et al...
January 2017: Extremophiles: Life Under Extreme Conditions
https://www.readbyqxmd.com/read/27707496/early-goal-directed-mobilisation-in-the-surgical-intensive-care-unit-a-randomised-controlled-trial
#15
RANDOMIZED CONTROLLED TRIAL
Stefan J Schaller, Matthew Anstey, Manfred Blobner, Thomas Edrich, Stephanie D Grabitz, Ilse Gradwohl-Matis, Markus Heim, Timothy Houle, Tobias Kurth, Nicola Latronico, Jarone Lee, Matthew J Meyer, Thomas Peponis, Daniel Talmor, George C Velmahos, Karen Waak, J Matthias Walz, Ross Zafonte, Matthias Eikermann
BACKGROUND: Immobilisation predicts adverse outcomes in patients in the surgical intensive care unit (SICU). Attempts to mobilise critically ill patients early after surgery are frequently restricted, but we tested whether early mobilisation leads to improved mobility, decreased SICU length of stay, and increased functional independence of patients at hospital discharge. METHODS: We did a multicentre, international, parallel-group, assessor-blinded, randomised controlled trial in SICUs of five university hospitals in Austria (n=1), Germany (n=1), and the USA (n=3)...
October 1, 2016: Lancet
https://www.readbyqxmd.com/read/27647682/active-delineation-of-meyer-s-loop-using-oriented-priors-through-magnetic-tractography-magnet
#16
Maxime Chamberland, Benoit Scherrer, Sanjay P Prabhu, Joseph Madsen, David Fortin, Kevin Whittingstall, Maxime Descoteaux, Simon K Warfield
Streamline tractography algorithms infer connectivity from diffusion MRI (dMRI) by following diffusion directions which are similarly aligned between neighboring voxels. However, not all white matter (WM) fascicles are organized in this manner. For example, Meyer's loop is a highly curved portion of the optic radiation (OR) that exhibits a narrow turn, kissing and crossing pathways, and changes in fascicle dispersion. From a neurosurgical perspective, damage to Meyer's loop carries a potential risk of inducing vision deficits to the patient, especially during temporal lobe resection surgery...
January 2017: Human Brain Mapping
https://www.readbyqxmd.com/read/27633147/closed-loop-gastric-electrical-stimulation-versus-laparoscopic-adjustable-gastric-band-for-the-treatment-of-obesity-a-randomized-12-month-multicenter-study
#17
T Horbach, G Meyer, S Morales-Conde, I Alarcón, F Favretti, M Anselmino, G M Rovera, J Dargent, C Stroh, M Susewind, A J Torres
OBJECTIVE: To compare the weight loss, change in quality of life (QOL) and safety of closed-loop gastric electrical stimulation (CLGES) versus adjustable gastric band (LAGB) in the treatment of obesity. METHODS: This multicenter, randomized, non-inferiority trial randomly assigned the patients in a 2:1 ratio to laparoscopic CLGES versus LAGB and followed them for 1 year. We enrolled 210 patients, of whom 50 were withdrawn preoperatively. Among 160 remaining patients (mean age=39±11 years; 75% women; mean body mass index=43±6 kg m(-)(2)) 106 received CLGES and 54 received LAGB...
December 2016: International Journal of Obesity: Journal of the International Association for the Study of Obesity
https://www.readbyqxmd.com/read/27589505/a-new-therapeutic-application-of%C3%A2-brain-machine-interface-bmi-training-followed-by-hybrid-assistive-neuromuscular-dynamic-stimulation-hands-therapy-for%C3%A2-patients-with-severe-hemiparetic-stroke-a-proof-of-concept-study
#18
Michiyuki Kawakami, Toshiyuki Fujiwara, Junichi Ushiba, Atsuko Nishimoto, Kaoru Abe, Kaoru Honaga, Atsuko Nishimura, Katsuhiro Mizuno, Mitsuhiko Kodama, Yoshihisa Masakado, Meigen Liu
BACKGROUND: Hybrid assistive neuromuscular dynamic stimulation (HANDS) therapy improved paretic upper extremity motor function in patients with severe to moderate hemiparesis. We hypothesized that brain machine interface (BMI) training would be able to increase paretic finger muscle activity enough to apply HANDS therapy in patients with severe hemiparesis, whose finger extensor was absent. OBJECTIVE: The aim of this study was to assess the efficacy of BMI training followed by HANDS therapy in patients with severe hemiparesis...
September 21, 2016: Restorative Neurology and Neuroscience
https://www.readbyqxmd.com/read/27566714/the-evolving-utility-of-diffusion-tensor-tractography-in-the-surgical-management-of-temporal-lobe-epilepsy-a-review
#19
REVIEW
Sananthan Sivakanthan, Elliot Neal, Ryan Murtagh, Fernando L Vale
BACKGROUND: Diffusion tensor imaging (DTI) is a relatively new imaging modality that has found many peri-operative applications in neurosurgery. METHODS: A comprehensive survey of the applications of diffusion tensor imaging (DTI) in planning for temporal lobe epilepsy surgery was conducted. The presentation of this literature is supplemented by a case illustration. RESULTS: The authors have found that DTI is well utilized in epilepsy surgery, primarily in the tractography of Meyer's loop...
November 2016: Acta Neurochirurgica
https://www.readbyqxmd.com/read/27555588/plekhg3-enhances-polarized-cell-migration-by-activating-actin-filaments-at-the-cell-front
#20
Trang Thi Thu Nguyen, Wei Sun Park, Byung Ouk Park, Cha Yeon Kim, Yohan Oh, Jin Man Kim, Hana Choi, Taeyoon Kyung, Cheol-Hee Kim, Gabsang Lee, Klaus M Hahn, Tobias Meyer, Won Do Heo
Cells migrate by directing Ras-related C3 botulinum toxin substrate 1 (Rac1) and cell division control protein 42 (Cdc42) activities and by polymerizing actin toward the leading edge of the cell. Previous studies have proposed that this polarization process requires a local positive feedback in the leading edge involving Rac small GTPase and actin polymerization with PI3K likely playing a coordinating role. Here, we show that the pleckstrin homology and RhoGEF domain containing G3 (PLEKHG3) is a PI3K-regulated Rho guanine nucleotide exchange factor (RhoGEF) for Rac1 and Cdc42 that selectively binds to newly polymerized actin at the leading edge of migrating fibroblasts...
September 6, 2016: Proceedings of the National Academy of Sciences of the United States of America
keyword
keyword
52384
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"