Planning and navigation as active inference.

Planning and navigation as active inference. Biol Cybern. 2018 Mar 23;: Authors: Kaplan R, Friston KJ Abstract This paper introduces an active inference formulation of planning and navigation. It illustrates how the exploitation-exploration dilemma is dissolved by acting to minimise uncertainty (i.e. expected surprise or free energy). We use simulations of a maze problem to illustrate how agents can solve quite complicated problems using context sensitive prior preferences to form subgoals. Our focus is on how epistemic behaviour-driven by novelty and the imperative to reduce uncertainty about the world-contextualises pragmatic or goal-directed behaviour. Using simulations, we illustrate the underlying process theory with synthetic behavioural and electrophysiological responses during exploration of a maze and subsequent navigation to a target location. An interesting phenomenon that emerged from the simulations was a putative distinction between 'place cells'-that fire when a subgoal is reached-and 'path cells'-that fire until a subgoal is reached. PMID: 29572721 [PubMed - as supplied by publisher]
Source: Biological Cybernetics - Category: Science Authors: Tags: Biol Cybern Source Type: research

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Source: The Student Room - Category: Universities & Medical Training Authors: Tags: Medicine Source Type: forums
Publication date: Available online 17 August 2018Source: Journal of Visceral SurgeryAuthor(s): T. Sarcher, B. Dupont, A. Alves, B. MenahemSummaryMultidisciplinary management of infra-peritoneal rectal cancer has pushed back the frontiers of sphincter preservation, without impairment of carcinological outcome. However, functional intestinal sequelae, grouping together several symptoms known under the name of anterior resection syndrome (ARS), have emerged and become an increasingly frequent concern for both patients and physicians. The pathophysiology is complex: ARS is a combination in various degrees of stool frequency, i...
Source: Journal of Visceral Surgery - Category: Surgery Source Type: research
ConclusionsThe current series is one of the largest reported experiences using ISB to identify injured lymphatics responsible for LC or LF. Lymphatic complications after a vascular procedure usually occur within 3 weeks of the index vascular procedure, with LF being identified and treated earlier than LC. ISB injection rapidly identifies disrupted extremity lymphatics. Ligation of these lymphatics results in reliable resolution of the lymphatic complication.
Source: Journal of Vascular Surgery: Venous and Lymphatic Disorders - Category: Surgery Source Type: research
ConclusionsCDT through an anterior tibial vein approach is a feasible, effective, and safe method for acute extensive lower extremity DVT patients. In addition, the anterior tibial vein approach can be an alternative to the traditional CDT approach.
Source: Journal of Vascular Surgery: Venous and Lymphatic Disorders - Category: Surgery Source Type: research
Publication date: Available online 17 August 2018Source: Journal of Vascular Surgery: Venous and Lymphatic DisordersAuthor(s): Micheal T. Ayad, David L. GillespieAbstractAnticoagulation is the cornerstone for the treatment of deep venous thrombosis and pulmonary embolism. On occasion, this is not possible because of bleeding complications or, rarely, breakthrough pulmonary embolism associated with this treatment method. The development of vena cava interruption in the 1970s was a critical advance in the treatment of these patients. Placement of inferior vena cava (IVC) filters has been steadily increasing since their intro...
Source: Journal of Vascular Surgery: Venous and Lymphatic Disorders - Category: Surgery Source Type: research
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Source: Journal of Vascular Surgery: Venous and Lymphatic Disorders - Category: Surgery Source Type: research
ConclusionExploring perspectives in LARS patients resulted in the identification of potential improvements in current care pathways. Recommendations on ways to improve information provision, screening of LARS and methods to intervene in the gap of supportive care after discharge are presented. We recommend to implement these measures as QoL of patients undergoing colorectal cancer surgery may be improved.
Source: European Journal of Surgical Oncology (EJSO) - Category: Surgery Source Type: research
Publication date: September 2018Source: European Journal of Surgical Oncology, Volume 44, Issue 9Author(s):
Source: European Journal of Surgical Oncology (EJSO) - Category: Surgery Source Type: research
In this study, we compared perioperative and oncologic outcomes of patients treated with either open or robot-assisted radical cystectomy and intracorporeal neobladder at a tertiary care center.MethodsThe institutional prospective bladder cancer database was queried for “cystectomy with curative intent” and “neobladder”. All patients underwent robot-assisted radical cystectomy and intracorporeal neobladder or open radical cystectomy and orthotopic neobladder for high-grade non-muscle invasive bladder cancer or muscle invasive bladder cancer with a follow-up length ≥2 years were included. A 1:1 pr...
Source: European Journal of Surgical Oncology (EJSO) - Category: Surgery Source Type: research
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Source: European Journal of Surgical Oncology (EJSO) - Category: Surgery Source Type: research
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