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Sanna L Lahtinen, Janne H Liisanantti, Meri M Poukkanen, Päivi A Laurila
BACKGROUND: Goal-directed fluid management using stroke volume variation (SVV) analysis is not well studied in free flap reconstruction surgery in patients with head and neck cancer. METHODS: Patients operated due to cancer of the head and neck with free flap reconstruction during 2008-2010 and 2012-2014 in Oulu University Hospital were retrospectively evaluated to determine the impact of SVV-guided fluid management on perioperative fluid balance, postoperative complications and hospital length of stay (LOS)...
October 19, 2016: Minerva Anestesiologica
Rachel Barr, Alecia Moser, Sylvia Rusnak, Laura Zimmermann, Kelly Dickerson, Herietta Lee, Peter Gerhardstein
Early childhood is characterized by memory capacity limitations and rapid perceptual and motor development [Rovee-Collier (1996). Infant Behavior & Development, 19, 385-400]. The present study examined 2-year olds' reproduction of a sliding action to complete an abstract fish puzzle under different levels of memory load and perceptual feature support. Experimental groups were compared to baseline controls to assess spontaneous rates of production of the target actions; baseline production was low across all experiments...
November 2016: Developmental Psychobiology
David J Anderson
Goal-directed social behaviours such as mating and fighting are associated with scalable and persistent internal states of emotion, motivation, arousal or drive. How those internal states are encoded and coupled to behavioural decision making and action selection is not clear. Recent studies in Drosophila melanogaster and mice have identified circuit nodes that have causal roles in the control of innate social behaviours. Remarkably, in both species, these relatively small groups of neurons can influence both aggression and mating, and also play a part in the encoding of internal states that promote these social behaviours...
October 18, 2016: Nature Reviews. Neuroscience
Cong Lu, Zhe Shi, Xiuping Sun, Ruile Pan, Shanguang Chen, Yinghui Li, Lina Qu, Lihua Sun, Haixia Dang, Lanlan Bu, Lingling Chen, Xinmin Liu
ETHNOPHARMACOLOGICAL RELEVANCE: Kai Xin San (KXS), a traditional formula of Chinese medicine, has been used to treat dementia. AIM OF THE STUDY: The present study aimed to investigate its ameliorating effects on Aβ1-40-induced cognitive impairment in rats using a series of novel reward-directed instrumental learning tasks, and to determine its possible mechanism of action. MATERIALS AND METHODS: Rats were pretreated with KXS aqueous extract (0...
October 14, 2016: Journal of Ethnopharmacology
Anthony J Weekes, Angela K Johnson, Daniel Troha, Gregory Thacker, Jordan Chanler-Berat, Michael Runyon
BACKGROUND: Right ventricular dysfunction (RVD) in pulmonary embolism (PE) has been associated with increased morbidity. Tools for RVD identification are not well defined. The prognostic value of RVD markers to predict serious adverse events (SAE) during hospitalization is unclear. OBJECTIVE: Prospectively compare the incidence of SAE in normotensive emergency department patients with PE based upon RVD by goal-directed echocardiography (GDE), cardiac biomarkers, and right-to-left ventricle ratio by computed tomography (CT)...
October 14, 2016: Journal of Emergency Medicine
Scott C Watkins, Andrew D Shaw
PURPOSE OF REVIEW: The past decade has seen more advances in our understanding of fluid therapy than the preceding decades combined. What was once thought to be a relatively benign panacea is increasingly being recognized as a potent pharmacological and physiological intervention that may pose as much harm as benefit. RECENT FINDINGS: Recent studies have clearly indicated that the amount, type, and timing of fluid administration have profound effects on patient morbidity and outcomes...
September 29, 2016: Current Opinion in Critical Care
Mark Cropley, Fred R H Zijlstra, Dawn Querstret, Sarah Beck
Work-related rumination, that is, perseverative thinking about work during leisure time, has been associated with a range of negative health and wellbeing issues. The present paper examined the association between work-related rumination and cognitive processes centerd around the theoretical construct of executive functioning. Executive functioning is an umbrella term for high level cognitive processes such as planning, working memory, inhibition, mental flexibility; and it underlies how people manage and regulate their goal directed behavior...
2016: Frontiers in Psychology
Christian Vassallo, Anne-Hélène Olivier, Philippe Souères, Armel Crétual, Olivier Stasse, Julien Pettré
Robots and Humans have to share the same environment more and more often. In the aim of steering robots in a safe and convenient manner among humans it is required to understand how humans interact with them. This work focuses on collision avoidance between a human and a robot during locomotion. Having in mind previous results on human obstacle avoidance, as well as the description of the main principles which guide collision avoidance strategies, we observe how humans adapt a goal-directed locomotion task when they have to interfere with a mobile robot...
September 26, 2016: Gait & Posture
Tamara Ius, Luca Turella, Giada Pauletto, Miriam Isola, Marta Maieron, Giovanni Sciacca, Riccardo Budai, Serena D'Agostini, Roberto Eleopra, Miran Skrap
BACKGROUND: Pre-operative diffusion tensor tractography (DTT) has recently been utilized to aid in the mapping of functional pathways in order to limit damage associated with resection of low-grade gliomas. OBJECTIVE: To assess the predictive capacity of DTT as a biomarker of post-operative motor outcomes in patients with low-grade gliomas (LGGs) involving the corticospinal tract (CST). CST parameters obtained using a quantitative fiber-tracking approach were used to investigate the reliability of the DTT biomarker by comparing their values in the tumoral (Tcst) and healthy (Hcst) hemispheres...
October 12, 2016: World Neurosurgery
Teemu Luostarinen, Ann-Christine Lindroos, T Niiya, M Silvasti-Lundell, Alexey Schramko, Juha Hernesniemi, Tarja Randell, Tomi Niemi
OBJECTIVE: Neurosurgery in general anesthesia exposes patient to hemodynamic alternations both in prone and sitting position. As the comparison of the sitting and prone position in neurosurgery is scarce, we aimed to evaluate hemodynamic profile during stroke volume-directed fluid administration in patients undergoing neurosurgery either in sitting or prone position. METHODS: Thirty patients in prone and 28 in sitting position in two separate prospective trials were randomized to receive either Ringer's Acetate (RAC) or hydroxyethyl starch (HES 130 kDa/0...
October 12, 2016: World Neurosurgery
Randolph F Helfrich, Robert T Knight
The prefrontal cortex (PFC) provides the structural basis for numerous higher cognitive functions. However, it is still largely unknown which mechanisms provide the functional basis for flexible cognitive control of goal-directed behavior. Here, we review recent findings that suggest that the functional architecture of cognition is profoundly rhythmic and propose that the PFC serves as a conductor to orchestrate task-relevant large-scale networks. We highlight several studies that demonstrated that oscillatory dynamics, such as phase resetting, cross-frequency coupling (CFC), and entrainment, support PFC-dependent recruitment of task-relevant regions into coherent functional networks...
October 12, 2016: Trends in Cognitive Sciences
Matthew S Mosca, George Justison, T Brett Reece
OBJECTIVE: The optimal strategy to deliver antegrade cerebral perfusion for cerebral protection during hypothermic circulatory arrest has not been established. The purpose of this review was to present our current clinical protocol utilizing selective antegrade cerebral perfusion during aortic arch surgery and to compare it to other published experience. CLINICAL PROTOCOL: Since 2013, our clinical protocol for aortic arch surgery has evolved to using selective antegrade cerebral perfusion via the innominate artery, moderate hypothermia, and ancillary strategies such as goal-directed perfusion (GDP)...
October 14, 2016: Seminars in Cardiothoracic and Vascular Anesthesia
R N Makroo, Soma Agrawal, Mohit Chowdhry, Brinda Kakkar, Uday K Thakur
BACKGROUND: Liver transplantation is one of the solid organs most commonly being transplanted across the world. The indications, affordability and accessibility have grown manifold. To increase the donor pool, inclusion of ABO incompatible liver donors is being considered. To enhance the graft functioning and survival, immunoadsorption apheresis to reduce the ABO hemagglutination titres are on the rise. CASE REPORT: We report three cases ABO incompatible liver transplantation with immunoadsorption protocol...
September 28, 2016: Transfusion and Apheresis Science
Anirban Som, Souvik Maitra, Sulagna Bhattacharjee, Dalim K Baidya
BACKGROUND AND AIMS: Optimum perioperative fluid administration may improve postoperative outcome after major surgery. This meta-analysis and systematic review has been aimed to determine the effect of dynamic goal directed fluid therapy (GDFT) on postoperative morbidity and mortality in non-cardiac surgical patients. MATERIAL AND METHODS: Meta-analysis of published prospective randomized controlled trials where GDFT based on non-invasive flow based hemodynamic measurement has been compared with a standard care...
October 13, 2016: Journal of Anesthesia
Joseph C Dort, D Gregory Farwell, Merran Findlay, Gerhard F Huber, Paul Kerr, Melissa A Shea-Budgell, Christian Simon, Jeffrey Uppington, David Zygun, Olle Ljungqvist, Jeffrey Harris
Importance: Head and neck cancers often require complex, labor-intensive surgeries, especially when free flap reconstruction is required. Enhanced recovery is important in this patient population but evidence-based protocols on perioperative care for this population are lacking. Objective: To provide a consensus-based protocol for optimal perioperative care of patients undergoing head and neck cancer surgery with free flap reconstruction. Evidence Review: Following endorsement by the Enhanced Recovery After Surgery (ERAS) Society to develop this protocol, a systematic review was conducted for each topic...
October 13, 2016: JAMA Otolaryngology—Head & Neck Surgery
Emmanuel Ducrocq, Mark Wilson, Sam Vine, Nazanin Derakshan
Attentional control is a necessary function for the regulation of goal-directed behavior. In three experiments we investigated whether training inhibitory control using a visual search task could improve task specific measures of attentional control and performance. In experiment 1 results revealed that training elicited a near-transfer effect; improving performance on a cognitive (antisaccade) task assessing inhibitory control. In Experiment 2 an initial far-transfer effect of training was observed on an index of attentional control validated for tennis...
October 13, 2016: Journal of Sport & Exercise Psychology
Carien S Lansink, Guido T Meijer, Jan V Lankelma, Martin A Vinck, Jadin C Jackson, Cyriel M A Pennartz
: The use of information from the hippocampal memory system in motivated behavior depends on its communication with the ventral striatum. When an animal encounters cues that signal subsequent reward, its reward expectancy is raised. It is unknown, however, how this process affects hippocampal dynamics and their influence on target structures, such as ventral striatum. We show that, in rats, reward-predictive cues result in enhanced hippocampal theta and beta band rhythmic activity during subsequent action, compared with uncued goal-directed navigation...
October 12, 2016: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
Fabian Grabenhorst, Istvan Hernadi, Wolfram Schultz
The amygdala is a prime valuation structure yet its functions in advanced behaviors are poorly understood. We tested whether individual amygdala neurons encode a critical requirement for goal-directed behavior: the evaluation of progress during sequential choices. As monkeys progressed through choice sequences toward rewards, amygdala neurons showed phasic, gradually increasing responses over successive choice steps. These responses occurred in the absence of external progress cues or motor preplanning. They were often specific to self-defined sequences, typically disappearing during instructed control sequences with similar reward expectation...
October 12, 2016: ELife
Ibhar Al Mheid, Heval Mohamed Kelli, Yi-An Ko, Muhammad Hammadah, Hina Ahmed, Salim Hayek, Viola Vaccarino, Thomas R Ziegler, Greg Gibson, Michelle Lampl, R Wayne Alexander, Ken Brigham, Greg S Martin, Arshed A Quyyumi
BACKGROUND: Lifestyle modifications are first-line measures for cardiovascular disease prevention. Whether lifestyle intervention also preserves cardiovascular health is less clear. Our study examined the role of a Health Partner-administered lifestyle intervention on metrics of ideal cardiovascular health. METHODS AND RESULTS: A total of 711 university employees (48±11 years; 66% women, 72% Caucasian/22.5% African Americans) enrolled in a program that promoted healthier lifestyles at Emory University (Atlanta, GA)...
October 11, 2016: Journal of the American Heart Association
Anna Vera Cuppone, Valentina Squeri, Marianna Semprini, Lorenzo Masia, Jürgen Konczak
This study examined the trainability of the proprioceptive sense and explored the relationship between proprioception and motor learning. With vision blocked, human learners had to perform goal-directed wrist movements relying solely on proprioceptive/haptic cues to reach several haptically specified targets. One group received additional somatosensory movement error feedback in form of vibro-tactile cues applied to the skin of the forearm. We used a haptic robotic device for the wrist and implemented a 3-day training regimen that required learners to make spatially precise goal-directed wrist reaching movements without vision...
2016: PloS One
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