keyword
MENU ▼
Read by QxMD icon Read
search

Computer

keyword
https://www.readbyqxmd.com/read/29783079/altered-neural-encoding-of-prediction-errors-in-assault-related-posttraumatic-stress-disorder
#1
Marisa C Ross, Jennifer K Lenow, Clinton D Kilts, Josh M Cisler
Posttraumatic stress disorder (PTSD) is widely associated with deficits in extinguishing learned fear responses, which relies on mechanisms of reinforcement learning (e.g., updating expectations based on prediction errors). However, the degree to which PTSD is associated with impairments in general reinforcement learning (i.e., outside of the context of fear stimuli) remains poorly understood. Here, we investigate brain and behavioral differences in general reinforcement learning between adult women with and without a current diagnosis of PTSD...
May 12, 2018: Journal of Psychiatric Research
https://www.readbyqxmd.com/read/29783043/developmental-changes-in-the-perception-of-visuotactile-simultaneity
#2
Yi-Chuan Chen, Terri L Lewis, David I Shore, Charles Spence, Daphne Maurer
A simultaneity judgment (SJ) task was used to measure the developmental trajectory of visuotactile simultaneity perception in children (aged 7, 9, 11, and 13 years) and adults. Participants were presented with a visual flash in the center of a computer monitor and a tap on their right index finger (located 20° below the flash) with 13 possible stimulus onset asynchronies (SOAs). Participants reported whether the flash and tap were presented at the same time. Compared with the adult group, children aged 7 and 9 years made more simultaneous responses when the tap led by more than 300 ms and when the flash led by more than 200 ms, whereas they made fewer simultaneous responses at the 0 ms SOA...
May 18, 2018: Journal of Experimental Child Psychology
https://www.readbyqxmd.com/read/29782927/modeling-the-odor-landscape-resulting-from-the-pumping-behavior-of-bivalve-clams-in-the-presence-of-predators
#3
A Alvarez
Motivated by experimental findings, a computational fluid dynamics (CFD) model was used to investigate whether the clam Mercenaria mercenaria may alter its cue downstream variability by an exhalant random pumping behavior. This behavior was hypothesized to occur in the presence of predator chemical signals in order to prevent successful tracking by the predator. Simulated downstream flow and mixing conditions derived from the random nature of the clam exhalant jet in a crossflow were analyzed by computing an intermittency factor, determining the field of finite-time Lyapunov exponents (FTLEs) and identifying the resulting Lagrangian coherent structures (LCSs)...
May 18, 2018: Journal of Theoretical Biology
https://www.readbyqxmd.com/read/29782884/semi-automated-quantification-and-neuroanatomical-mapping-of-heterogeneous-cell-populations
#4
Oscar A Mendez, Colin J Potter, Michael Valdez, Thomas Bello, Theodore P Trouard, Anita A Koshy
BACKGROUND: Our group studies the interactions between cells of the brain and the neurotropic parasite Toxoplasma gondii. Using an in vivo system that allows us to permanently mark and identify brain cells injected with Toxoplasma protein, we have identified that Toxoplasma-injected neurons (TINs) are heterogeneously distributed throughout the brain. Unfortunately, standard methods to quantify and map heterogeneous cell populations onto a reference brain atlas are time consuming and prone to user bias...
May 18, 2018: Journal of Neuroscience Methods
https://www.readbyqxmd.com/read/29782812/what-variables-are-associated-with-the-outcome-of-arthroscopic-lysis-and-lavage-surgery-for-internal-derangement-of-the-temporomandibular-joint
#5
Tyler H Haeffs, Lindsay N D'Amato, Shehryar N Khawaja, David A Keith, Steven J Scrivani
PURPOSE: Arthroscopic lysis and lavage surgery (AS) is an effective modality that can decrease pain and increase maximum interincisal opening (MIO) in patients with internal derangement (ID) of the temporomandibular joint (TMJ). However, some patients remain in pain or have limited mandibular range of motion despite AS. The purpose of this study was to determine the effectiveness, prevalence of adverse effects, and predictors of response to TMJ AS in patients with TMJ arthralgia and ID...
April 26, 2018: Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/29782801/epr-evidence-of-liquid-water-in-ice-an-intrinsic-property-of-water-or-a-self-confinement-effect
#6
Muthulakshmi Thangswamy, Priya Maheshwari, Dhanadeep Dutta, Vinayak G Rane, Pradeep Kumar Pujari
Liquid water (LW) existence in pure ice below 273 K has been a controversial aspect primarily because of the lack of experimental evidences. Recently, electron paramagnetic resonance (EPR) has been used to study deeply supercooled water in a rapidly-frozen polycrystalline ice. The same technique can also be used to probe the presence of LW in polycrystalline ice that has formed through a more conventional, slow cooling one. In this context, the present study aims to emphasize that in case of an external probe involving techniques such as EPR, the results are influenced by the binary phase (BP) diagram of the probe-water system, which also predicts the existence of LW domains in ice, upto the eutectic point...
May 21, 2018: Journal of Physical Chemistry. A
https://www.readbyqxmd.com/read/29782657/phantom-clinical-and-texture-indices-evaluation-and-optimization-of-a-penalized-likelihood-image-reconstruction-method-q-clear-on-a-bgo-pet-ct-scanner
#7
Gabriel Reynés-Llompart, Cristina Gámez-Cenzano, José Luís Vercher-Conejero, Aida Sabaté-Llobera, Nahúm Calvo-Malvar, Josep M Martí-Climent
INTRODUCTION: The aim of this study was to evaluate the behavior of a penalized-likelihood image reconstruction method (Q.Clear) under different count statistics and lesion-to-background ratios (LBR) on a BGO scanner, in order to obtain an optimum penalization factor (β value) to study and optimize for different acquisition protocols and clinical goals. METHODS: Both phantom and patient images were evaluated. Data from an image quality phantom were acquired using different Lesion-to-Background ratios and acquisition times...
May 21, 2018: Medical Physics
https://www.readbyqxmd.com/read/29782609/low-cost-customized-cranioplasty-using-a-3d-digital-printing-model-a-case-report
#8
Abel De La Peña, Javier De La Peña-Brambila, Juan Pérez-De La Torre, Miguel Ochoa, Guillermo J Gallardo
Background: Cranial defects usually occur after trauma, neurosurgical procedures like decompressive craniotomy, tumour resections, infection and congenital defects. The purpose of cranial vault repair is to protect the underlying brain tissue, to reduce any localized pain and patient anxiety, and improve cranial aesthetics. Cranioplasty is a frequent neurosurgical procedure achieved with the aid of cranial prosthesis made from materials such as: titanium, autologous bone, ceramics and polymers...
2018: 3D Print Med
https://www.readbyqxmd.com/read/29782588/ground-glass-pulmonary-nodules-their-significance-in-oncology-patients-and-the-role-of-computer-tomography-and-18f-fluorodeoxyglucose-positron-emission-tomography
#9
Laura Evangelista, Annalori Panunzio, Elena Scagliori, Paolo Sartori
Objective: to determine the clinical significance of ground glass pulmonary nodules, either pure (GGNs) or mixed with the presence of solid component (MPNs), in patients with known pulmonary or extra-thoracic malignancies and to evaluate the role of computed tomography (CT) and positron emission tomography (PET)/CT in their diagnosis and follow-up. Methods: A total of 130 nodules in 68 patients were revealed: 119 GGNs and 11 MPNs. GGN lesions were found in 58 patients, MPNs in eight, and in two cases, both...
2018: Eur J Hybrid Imaging
https://www.readbyqxmd.com/read/29782582/surfaces-from-the-visual-past-recovering-high-resolution-terrain-data-from-historic-aerial-imagery-for-multitemporal-landscape-analysis
#10
Christopher Sevara, Geert Verhoeven, Michael Doneus, Erich Draganits
Historic aerial images are invaluable sources of aid to archaeological research. Often collected with large-format photogrammetric quality cameras, these images are potential archives of multidimensional data that can be used to recover information about historic landscapes that have been lost to modern development. However, a lack of camera information for many historic images coupled with physical degradation of their media has often made it difficult to compute geometrically rigorous 3D content from such imagery...
2018: Journal of archaeological method and theory
https://www.readbyqxmd.com/read/29782569/patient-selection-for-future-lung-cancer-computed-tomography-screening-programmes-lessons-learnt-post-national-lung-cancer-screening-trial
#11
EDITORIAL
John K Field, Stephen W Duffy, David R Baldwin
No abstract text is available yet for this article.
April 2018: Translational Lung Cancer Research
https://www.readbyqxmd.com/read/29782568/true-technology-enabled-mental-health-care-when-will-we-trust-the-computers-and-robots
#12
EDITORIAL
Alishia Williams
No abstract text is available yet for this article.
2018: MHealth
https://www.readbyqxmd.com/read/29782518/objective-assessment-of-flap-volume-changes-and-aesthetic-results-after-adjuvant-radiation-therapy-in-patients-undergoing-immediate-autologous-breast-reconstruction
#13
Yujin Myung, Yousung Son, Tae-Hyun Nam, Eunyoung Kang, Eun-Kyu Kim, In Ah Kim, Keun-Yong Eom, Chan Yeong Heo, Jae Hoon Jeong
BACKGROUND: The use of immediate breast reconstruction and adjuvant radiation therapy is increasing in breast cancer patients. This study aimed to analyze the aesthetic outcome and changes in flap volume in patients with breast cancer undergoing radiation therapy of the surgical site after immediate autologous tissue reconstruction. METHODS: Immediate abdominal free flap breast reconstruction following unilateral mastectomy was performed in 42 patients; 21 patients received adjuvant radiation (study group) and 21 patients did not (control group)...
2018: PloS One
https://www.readbyqxmd.com/read/29782513/high-red-blood-cell-composition-in-clots-is-associated-with-successful-recanalization-during-intra-arterial-thrombectomy
#14
Jong Wook Shin, Hye Seon Jeong, Hyon-Jo Kwon, Kyu Sang Song, Jei Kim
We evaluated the composition of individual clots retrieved during intra-arterial thrombectomy in relation to recanalization success, stroke subtype, and the presence of clot signs on initial brain images. We analyzed clot and interventional data from 145 retrieval trials performed for 37 patients (69.5±14.0 years, 20 men, large artery atherosclerosis, n = 7; cardioembolism, n = 22; undetermined etiology, n = 8) who had undergone intra-arterial thrombectomy. Rates of clot retrieval and successful recanalization (Arterial Occlusive Lesion score of 2-3) for separate retrieval trials were evaluated...
2018: PloS One
https://www.readbyqxmd.com/read/29782491/community-based-benchmarking-improves-spike-rate-inference-from-two-photon-calcium-imaging-data
#15
Philipp Berens, Jeremy Freeman, Thomas Deneux, Nicolay Chenkov, Thomas McColgan, Artur Speiser, Jakob H Macke, Srinivas C Turaga, Patrick Mineault, Peter Rupprecht, Stephan Gerhard, Rainer W Friedrich, Johannes Friedrich, Liam Paninski, Marius Pachitariu, Kenneth D Harris, Ben Bolte, Timothy A Machado, Dario Ringach, Jasmine Stone, Luke E Rogerson, Nicolas J Sofroniew, Jacob Reimer, Emmanouil Froudarakis, Thomas Euler, Miroslav Román Rosón, Lucas Theis, Andreas S Tolias, Matthias Bethge
In recent years, two-photon calcium imaging has become a standard tool to probe the function of neural circuits and to study computations in neuronal populations. However, the acquired signal is only an indirect measurement of neural activity due to the comparatively slow dynamics of fluorescent calcium indicators. Different algorithms for estimating spike rates from noisy calcium measurements have been proposed in the past, but it is an open question how far performance can be improved. Here, we report the results of the spikefinder challenge, launched to catalyze the development of new spike rate inference algorithms through crowd-sourcing...
May 21, 2018: PLoS Computational Biology
https://www.readbyqxmd.com/read/29782395/pull-out-of-upper-thoracic-pedicle-screws-can-cause-spinal-canal-encroachment-in-growing-rod-treatment
#16
Senol Bekmez, Aykut Kocyigit, Zeynep Deniz Olgun, Mehmet Ayvaz, Halil Gokhan Demirkiran, Ergun Karaagaoglu, Muharrem Yazici
BACKGROUND: Proximal foundation failure is a common complication of growing rod (GR) treatment for early-onset scoliosis. Spinal canal encroachment due to pull-out of pedicle screw used as proximal foundation has been anecdotally reported in GR patients. The aim of this study is to report the prevalence of spinal canal encroachment of pedicle screws in GR treatment and determine risk factors using a single-center cohort. METHODS: Inclusion criteria were: (1) GR for early-onset scoliosis and (2) pull-out of at least 1 proximal anchor pedicle screw...
May 4, 2018: Journal of Pediatric Orthopedics
https://www.readbyqxmd.com/read/29782393/clinical-and-prognostic-value-of-18f-fdg-pet-ct-in-restaging-of-pancreatic-cancer
#17
Domenico Albano, Demetrio Familiari, Roberta Gentile, Salvatore Scalisi, Federico Midiri, Marco Messina, Massimiliano Spada, Maria C Fornito, Massimo Galia, Massimo Midiri, Pierpaolo Alongi
AIM: The aim of this retrospective multicentre study was to evaluate the clinical and prognostic effect of fluorine-18-fluorodeoxyglucose (F-FDG)-PET/computed tomography (CT) in the restaging process of pancreatic cancer (PC). MATERIALS AND METHODS: Data from patients treated for primary PC, who underwent F-FDG-PET/CT for suspicious of disease progression, were collected. Accuracy was assessed employing conventional diagnostic procedures, multidisciplinary team case notes, further F-FDG-PET/CT scans and/or follow-up...
May 18, 2018: Nuclear Medicine Communications
https://www.readbyqxmd.com/read/29782389/development-of-a-novel-self-administered-cognitive-assessment-tool-and-normative-data-for-older-adults
#18
Raphael J Monsch, Amélie C Burckhardt, Manfred Berres, Alessandra E Thomann, Michael M Ehrensperger, Luzius A Steiner, Nicolai Goettel
BACKGROUND: Preexisting cognitive impairment in surgical patients is one of the leading risk factors for adverse cognitive outcomes such as postoperative delirium and postoperative cognitive dysfunction. We developed a self-administered tablet computer application intended to assess the individual risk for adverse postoperative cognitive outcomes. This cross-sectional study aimed to establish normative data for the tool. MATERIALS AND METHODS: Healthy volunteers aged 65 years and above were administered the Mini-Mental State Examination, Geriatric Depression Scale, and Consortium to Establish a Registry for Alzheimer's Disease-Neuropsychological Assessment Battery to assess cognitive health...
May 18, 2018: Journal of Neurosurgical Anesthesiology
https://www.readbyqxmd.com/read/29782369/neuroimaging-in-epilepsy
#19
Meneka Kaur Sidhu, John S Duncan, Josemir W Sander
PURPOSE OF REVIEW: Epilepsy neuroimaging is important for detecting the seizure onset zone, predicting and preventing deficits from surgery and illuminating mechanisms of epileptogenesis. An aspiration is to integrate imaging and genetic biomarkers to enable personalized epilepsy treatments. RECENT FINDINGS: The ability to detect lesions, particularly focal cortical dysplasia and hippocampal sclerosis, is increased using ultra high-field imaging and postprocessing techniques such as automated volumetry, T2 relaxometry, voxel-based morphometry and surface-based techniques...
May 17, 2018: Current Opinion in Neurology
https://www.readbyqxmd.com/read/29782335/novel-placement-of-cortical-bone-trajectory-screws-in-the-lumbar-spine-a-radiographic-and-cadaveric-study
#20
Hai Gao, Renjie Zhang, Chongyu Jia, Tao Xing, Jianxiang Zhang, Fulong Dong, Peng Ge, Peiwen Song, Peng Xu, Huaqing Zhang, Huimin Li, Cailiang Shen
STUDY DESIGN: This is a radiographic and cadaveric study. OBJECTIVE: The aim of this study was to conduct a detailed comparison about the parameters between the ideal cortical bone trajectory (CBT) and practical CBT screw. SUMMARY OF BACKGROUND DATA: CBT screws have recently become popular in spinal surgery, mainly because of their improved fixation while minimizing soft tissue dissection. However, to our knowledge, no previous study has provided a detailed comparison on the parameters between the ideal CBT and practical CBT screws...
May 18, 2018: Clinical Spine Surgery
keyword
keyword
36862
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"