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https://www.readbyqxmd.com/read/28427320/the-role-of-inelastic-deformations-in-the-mechanical-response-of-endovascular-shape-memory-alloy-devices
#1
Lorenza Petrini, Alessandro Bertini, Francesca Berti, Giancarlo Pennati, Francesco Migliavacca
Nickel-titanium alloys are commonly adopted for producing cardiovascular minimally invasive devices such as self-expandable stents, aortic valves and stent-grafts. These devices are subjected to cyclic loads (due to blood pulsatility, leg or heart movements), that can induce fatigue fracture, and may also be subjected to very large deformations (due to crimping procedure, a tortuous physiological path or overloads), that can induce material yield. Recently, the authors developed a new constitutive model that considers inelastic strains due to not-completed reverse phase transformation (not all the stress-induced martensite turns back to austenite) or/and plasticity and their accumulation during cyclic loads...
May 2017: Proceedings of the Institution of Mechanical Engineers. Part H, Journal of Engineering in Medicine
https://www.readbyqxmd.com/read/28427051/subjective-time-perceptions-and-aging-well-a-review-of-concepts-and-empirical-research-a-mini-review
#2
Martina Gabrian, Anne J Dutt, Hans-Werner Wahl
Human beings impose subjective, time-related interpretations on their existence, and the experience of time is a major aspect of lifespan development. In this mini-review, we understand subjective time as the way individuals subjectively perceive and evaluate the passing of their personal "objective" lifetime. A broad range of constructs and operationalizations has been developed in (gero-) psychology to capture subjective time, including future time perspective, personal goals, or autobiographical memories...
April 21, 2017: Gerontology
https://www.readbyqxmd.com/read/28424025/selective-reminding-of-prospective-memory-in-multiple-sclerosis
#3
Joshua D McKeever, Maria T Schultheis, Tiffanie Sim, Jessica Goykhman, Kristina Patrick, Dawn M Ehde, Steven Paul Woods
OBJECTIVE: Multiple sclerosis (MS) is associated with prospective memory (PM) deficits, which may increase the risk of poor functional/health outcomes such as medication non-adherence. This study examined the potential benefits of selective reminding to enhance PM functioning in persons with MS. METHOD: Twenty-one participants with MS and 22 healthy adults (HA) underwent a neuropsychological battery including a Selective Reminding PM (SRPM) experimental procedure...
April 19, 2017: Neuropsychological Rehabilitation
https://www.readbyqxmd.com/read/28422912/vascular-complications-from-resuscitative-endovascular-balloon-occlusion-of-the-aorta-reboa-life-over-limb
#4
John R Taylor, John A Harvin, Clay Martin, John B Holcomb, Laura J Moore
BACKGROUND: Vascular complications from resuscitative endovascular balloon occlusion of the aorta (REBOA) have been reported as high as 13% with some patients requiring lower extremity amputation. We sought to review our institutions series of REBOA and assess our vascular complications. METHODS: Retrospective review of all patients undergoing REBOA from October 2011 through July 2016. Data was gathered from the Memorial Hermann Trauma registry and the hospital electronic medical records...
April 18, 2017: Journal of Trauma and Acute Care Surgery
https://www.readbyqxmd.com/read/28421283/shunting-of-the-over-80s-in-normal-pressure-hydrocephalus
#5
Simon D Thompson, J D Shand Smith, A A Khan, A M V Luoma, A K Toma, L D Watkins
BACKGROUND: Idiopathic normal pressure hydrocephalus is predominantly a disease of the elderly. By its nature, many of those who present to clinic are in advanced old age with multiple comorbidities. Majority of patients treated are younger than 80 years old. We present the clinical outcomes and complication rates of patients over the age of 80 years at the time of operation, during the past 11 years at a single institution. METHODS: Retrospective analysis of clinical records of all patients over the age of 80 years, who presented to our institution between 2006 and 2016...
April 18, 2017: Acta Neurochirurgica
https://www.readbyqxmd.com/read/28419281/expression-of-the-plasmodium-falciparum-clonally-variant-clag3-genes-in-human-infections
#6
Sofía Mira-Martínez, Evi van Schuppen, Alfred Amambua-Ngwa, Emmanuel Bottieau, Muna Affara, Marjan Van Esbroeck, Erika Vlieghe, Pieter Guetens, Núria Rovira-Graells, Gloria P Gómez-Pérez, Pedro L Alonso, Umberto D'Alessandro, Anna Rosanas-Urgell, Alfred Cortés
Background.: Many genes of the malaria parasite Plasmodium falciparum show clonally variant expression regulated at the epigenetic level. These genes participate in fundamental host-parasite interactions and contribute to adaptive processes. However, little is known about their expression patterns during human infections. A peculiar case of clonally variant genes are the 2 nearly identical clag3 genes, clag3.1 and clag3.2, which mediate nutrient uptake and are linked to resistance to some toxic compounds...
February 7, 2017: Journal of Infectious Diseases
https://www.readbyqxmd.com/read/28416633/intrusions-in-episodic-memory-reconsolidation-or-interference
#7
Angela Klingmüller, Jeremy B Caplan, Tobias Sommer
It would be profoundly important if reconsolidation research in animals and other memory domains generalized to human episodic memory. A 3-d-list-discrimination procedure, based on free recall of objects, with a contextual reminder cue (the testing room), has been thought to demonstrate reconsolidation of human episodic memory (as noted in a previous study). Our goal was to replicate the central result, a high intrusion rate during recall of the target list, and evaluate the reconsolidation account relative to an alternative account, based on state-dependent learning and interference...
May 2017: Learning & Memory
https://www.readbyqxmd.com/read/28416314/the-use-of-a-novel-approach-for-the-instrumentation-of-a-cone-beam-computed-tomography-discernible-lateral-canal-in-an-unusual-maxillary-incisor-case-report
#8
Antonis Chaniotis, Christos G Filippatos
Lateral and apical ramifications of the main root canal create potential pathways through which bacteria can spread and remain unaffected by treatment procedures. It is a challenge for the specialty to find techniques that can predictably reach, disinfect, and obturate these ramifications. Here, we report the use of a novel instrumentation approach to aid in the negotiation and management of a lateral canal discernible on cone-beam computed tomography (CBCT) in an unusual maxillary central incisor. A 23-year-old female patient was referred for evaluation and possible treatment of tooth 9...
April 14, 2017: Journal of Endodontics
https://www.readbyqxmd.com/read/28416021/effects-of-gabab-receptors-in-the-insula-on-recognition-memory-observed-with-intellicage
#9
Nan Wu, Feng Wang, Zhe Jin, Zhen Zhang, Lian-Kun Wang, Chun Zhang, Tao Sun
BACKGROUND: Insular function has gradually become a topic of intense study in cognitive research. Recognition memory is a commonly studied type of memory in memory research. GABABR has been shown to be closely related to memory formation. In the present study, we used intellicage, which is a new intelligent behavioural test system, and a bilateral drug microinjection technique to inject into the bilateral insula, to examine the relationship between GABABR and recognition memory. METHODS: Male Sprague-Dawley rats were randomly divided into control, Sham, Nacl, baclofen and CGP35348 groups...
April 17, 2017: Behavioral and Brain Functions: BBF
https://www.readbyqxmd.com/read/28415910/transfer-of-training-in-simple-addition
#10
Yalin Chen, Jamie I D Campbell
In recent years several researchers have proposed that skilled adults may solve single-digit addition problems (e.g. 3 + 1 = 4, 4 + 3 = 7) using a fast counting procedure. Practicing a procedure, often leads to transfer of learning and faster performance of unpracticed items. Such transfer has been demonstrated using a counting-based alphabet arithmetic task (e.g., B + 4 = C D E F) that indicated robust generalization of practice (i.e., RT gains) when untrained transfer problems at test had been implicitly practiced (e...
April 18, 2017: Quarterly Journal of Experimental Psychology: QJEP
https://www.readbyqxmd.com/read/28413654/hepatic-perivascular-epithelioid-cell-neoplasm-a-clinical-and-pathological-experience-in-diagnosis-and-treatment
#11
Wenying Chen, Yeqing Liu, Yanyan Zhuang, Juanfei Peng, Fengting Huang, Shineng Zhang
Hepatic perivascular epithelioid cell neoplasm (PEComa) is a rare type of neoplasm derived from mesenchymal tumors that is often misdiagnosed as hepatocellular carcinoma (HCC), hepatic hemangioma or other liver malignancies. The clinical and histological characteristics of PEComa have yet to be fully documented. To optimize the diagnosis and treatment of the disease, a retrospective analysis was performed to investigate the clinicopathological characteristics of 7 patients diagnosed with hepatic PEComa in the Sun Yat-Sen Memorial Hospital between January 2004 and December 2015...
April 2017: Molecular and Clinical Oncology
https://www.readbyqxmd.com/read/28407524/age-at-surgery-as-a-predictor-of-cognitive-improvements-in-patients-with-drug-resistant-temporal-epilepsy
#12
Irene Cano-López, Juan Francisco Vázquez, Anabel Campos, Antonio Gutiérrez, Mercedes Garcés, Asier Gómez-Ibáñez, Rebeca Conde, Esperanza González-Bono, Vicente Villanueva
Temporal lobe epilepsy (TLE) surgery is an effective procedure that can produce cognitive changes. However, the prognostic factors related with cognitive outcomes need to be better understood. The aim of the present study is to know if age at surgery is a reliable predictor of verbal memory competence and considering factors such as: hemisphere; type of surgery; pre-surgical seizure frequency; and epilepsy duration. Sixty-one typically dominant patients with drug-resistant TLE (34 with left TLE [L-TLE] and 27 with right TLE [R-TLE]) underwent a neuropsychological assessment before and a year after surgery...
April 10, 2017: Epilepsy & Behavior: E&B
https://www.readbyqxmd.com/read/28399933/intranasal-sedation-using-ketamine-and-midazolam-for-pediatric-dental-treatment-naso-study-protocol-for-a-randomized-controlled-trial
#13
Heloisa Sousa Gomes, Analya Rodrigues Miranda, Karolline Alves Viana, Aline Carvalho Batista, Paulo Sucasas Costa, Anelise Daher, Geovanna de Castro Morais Machado, Joji Sado-Filho, Liliani Aires Candido Vieira, Patrícia Corrêa-Faria, Marie Therese Hosey, Luciane Rezende Costa
BACKGROUND: Uncooperative children may need to receive dental treatment under sedation, which is indicated when nonpharmacological behavior guidance is unsuccessful. There are randomized controlled trials (RCTs) comparing different sedative protocols for dental procedures; however, the evidence for superiority of one form over another is weak. The primary aim of this study is to investigate the efficacy of intranasally administered ketamine plus midazolam for the dental treatment of children...
April 11, 2017: Trials
https://www.readbyqxmd.com/read/28395650/the-relationship-between-eyewitness-confidence-and-identification-accuracy-a-new-synthesis
#14
REVIEW
John T Wixted, Gary L Wells
The U.S. legal system increasingly accepts the idea that the confidence expressed by an eyewitness who identified a suspect from a lineup provides little information as to the accuracy of that identification. There was a time when this pessimistic assessment was entirely reasonable because of the questionable eyewitness-identification procedures that police commonly employed. However, after more than 30 years of eyewitness-identification research, our understanding of how to properly conduct a lineup has evolved considerably, and the time seems ripe to ask how eyewitness confidence informs accuracy under more pristine testing conditions (e...
May 2017: Psychological Science in the Public Interest: a Journal of the American Psychological Society
https://www.readbyqxmd.com/read/28395002/monitored-anesthesia-care-vs-intubation-for-vertebrobasilar-stroke-endovascular-therapy
#15
Ashutosh P Jadhav, Mehdi Bouslama, Amin Aghaebrahim, Leticia C Rebello, Matthew T Starr, Diogo C Haussen, Manasa Ranginani, Matthew K Whalin, Tudor G Jovin, Raul G Nogueira
Importance: No consensus regarding the ideal sedation treatment for stroke endovascular therapy has been reached, and practices remain largely based on local protocols and clinician preferences. Most studies have focused on anterior circulation strokes; therefore, little is known regarding the optimal anesthesia type for vertebrobasilar occlusion strokes. Objective: To compare clinical and angiographic outcomes between monitored anesthesia care (MAC) and general anesthesia (GA) in patients presenting with vertebrobasilar occlusion strokes...
April 10, 2017: JAMA Neurology
https://www.readbyqxmd.com/read/28393090/gender-specific-hippocampal-whole-genome-transcriptome-data-from-mice-lacking-the-cav2-3-r-type-or-cav3-2-t-type-voltage-gated-calcium-channel
#16
Anna Papazoglou, Christina Henseler, Andreas Lundt, Carola Wormuth, Julien Soos, Karl Broich, Dan Ehninger, Marco Weiergräber
Voltage-gated Ca(2+) channels are of central relevance in mediating numerous intracellular and transcellular processes including excitation-contraction coupling, excitation secretion-coupling, hormone and neurotransmitter release and gene expression. The Cav2.3 R-type Ca(2+) channel is a high-voltage activated channel which plays a crucial role in neurotransmitter release, long-term potentiation and hormone release. Furthermore, Cav2.3 R-type channels were reported to be involved in ictogenesis, epileptogenesis, fear behavior, sleep, pre-and postsynaptic integration and rhythmicity within the hippocampus...
June 2017: Data in Brief
https://www.readbyqxmd.com/read/28390877/effects-of-chronic-prenatal-mk-801-treatment-on-object-recognition-cognitive-flexibility-and-drug-induced-locomotor-activity-in-juvenile-and-adult-rat-offspring
#17
S Gallant, L Welch, P Martone, U Shalev
BACKGROUND: Patients with schizophrenia display impaired cognitive functioning and increased sensitivity to psychomimetic drugs. The neurodevelopmental hypothesis of schizophrenia posits that disruption of the developing brain predisposes neural networks to lasting structural and functional abnormalities resulting in the emergence of such symptoms in adulthood. Given the critical role of the glutamatergic system in early brain development, we investigated whether chronic prenatal exposure to the glutamate NMDA receptor antagonist, MK-801, induces schizophrenia-like behavioural and neurochemical changes in juvenile and adult rats...
April 6, 2017: Behavioural Brain Research
https://www.readbyqxmd.com/read/28390774/surgeon-leadership-in-the-coding-billing-and-contractual-negotiations-for-fenestrated-endovascular-aortic-aneurysm-repair-increases-medical-center-contribution-margin-and-physician-reimbursement
#18
Francesco Aiello, Jonathan Durgin, Vijaya Daniel, Louis Messina, Danielle Doucet, Jessica Simons, James Jenkins, Andres Schanzer
BACKGROUND: Fenestrated endovascular aneurysm repair (FEVAR) allows endovascular treatment of thoracoabdominal and juxtarenal aneurysms previously outside the indications of use for standard devices. However, because of considerable device costs and increased procedure time, FEVAR is thought to result in financial losses for medical centers and physicians. We hypothesized that surgeon leadership in the coding, billing, and contractual negotiations for FEVAR procedures will increase medical center contribution margin (CM) and physician reimbursement...
April 5, 2017: Journal of Vascular Surgery
https://www.readbyqxmd.com/read/28390295/examining-procedural-working-memory-processing-in-obsessive-compulsive-disorder
#19
Nitzan Shahar, Andrei R Teodorescu, Gideon E Anholt, Anat Karmon-Presser, Nachshon Meiran
Previous research has suggested that a deficit in working memory might underlie the difficulty of obsessive-compulsive disorder (OCD) patients to control their thoughts and actions. However, a recent meta-analyses found only small effect sizes for working memory deficits in OCD. Recently, a distinction has been made between declarative and procedural working memory. Working memory in OCD was tested mostly using declarative measurements. However, OCD symptoms typically concerns actions, making procedural working-memory more relevant...
March 27, 2017: Psychiatry Research
https://www.readbyqxmd.com/read/28389852/the-reliability-and-stability-of-visual-working-memory-capacity
#20
Z Xu, K C S Adam, X Fang, E K Vogel
Because of the central role of working memory capacity in cognition, many studies have used short measures of working memory capacity to examine its relationship to other domains. Here, we measured the reliability and stability of visual working memory capacity, measured using a single-probe change detection task. In Experiment 1, the participants (N = 135) completed a large number of trials of a change detection task (540 in total, 180 each of set sizes 4, 6, and 8). With large numbers of both trials and participants, reliability estimates were high (α > ...
April 7, 2017: Behavior Research Methods
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