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https://www.readbyqxmd.com/read/28103496/toddlers-action-prediction-statistical-learning-of-continuous-action-sequences
#1
Claire D Monroy, Sarah A Gerson, Sabine Hunnius
The current eye-tracking study investigated whether toddlers use statistical information to make anticipatory eye movements while observing continuous action sequences. In two conditions, 19-month-old participants watched either a person performing an action sequence (Agent condition) or a self-propelled visual event sequence (Ghost condition). Both sequences featured a statistical structure in which certain action pairs occurred with deterministic transitional probabilities. Toddlers learned the transitional probabilities between the action steps of the deterministic action pairs and made predictive fixations to the location of the next action in the Agent condition but not in the Ghost condition...
January 16, 2017: Journal of Experimental Child Psychology
https://www.readbyqxmd.com/read/28102913/autumn-photosynthetic-decline-and-growth-cessation-in-seedlings-of-white-spruce-are-decoupled-under-warming-and-photoperiod-manipulations
#2
Joseph R Stinziano, Danielle A Way
Climate warming is expected to increase the seasonal duration of photosynthetic carbon fixation and tree growth in high latitude forests. However photoperiod, a crucial cue for seasonality, will remain constant, which may constrain tree responses to warming. We investigated the effects of temperature and photoperiod on weekly changes in photosynthetic capacity, leaf biochemistry and growth in seedlings of a boreal evergreen conifer, white spruce (Picea glauca (Moench) Voss). Warming delayed autumn declines in photosynthetic capacity, extending the period when seedlings had high carbon uptake...
January 19, 2017: Plant, Cell & Environment
https://www.readbyqxmd.com/read/28102349/development-of-patient-specific-phantoms-for-verification-of-stereotactic-body-radiation-therapy-planning-in-patients-with-metallic-screw-fixation
#3
Dongryul Oh, Chae-Seon Hong, Sang Gyu Ju, Minkyu Kim, Bum Yong Koo, SungBack Choi, Hee Chul Park, Doo Ho Choi, Hongryull Pyo
A new technique for manufacturing a patient-specific dosimetric phantom using three-dimensional printing (PSDP_3DP) was developed, and its geometrical and dosimetric accuracy was analyzed. External body contours and structures of the spine and metallic fixation screws (MFS) were delineated from CT images of a patient with MFS who underwent stereotactic body radiation therapy for spine metastasis. Contours were converted into a STereoLithography file format using in-house program. A hollow, four-section PSDP was designed and manufactured using three types of 3DP to allow filling with a muscle-equivalent liquid and insertion of dosimeters...
January 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28102174/modeling-dynamics-of-mutants-in-heterogeneous-stem-cell-niche
#4
Leili Shahriyari, Ali Mahdipour Shirayeh
Studying the stem cell (SC) niche architecture is a crucial step for investigating the process of oncogenesis and obtaining an effective stem cell therapy for various cancers. Recently, it has been observed that there are two groups of SCs in the SC niche collaborating with each other to maintain tissue homeostasis: border stem cells (BSCs), which are responsible in controlling the number of non-stem cells as well as stem cells, and central stem cells (CeSCs), which regulate the SC niche. Here, we develop a bi-compartmental stochastic model for the SC niche to study the spread of mutants within the niche...
January 19, 2017: Physical Biology
https://www.readbyqxmd.com/read/28102166/stress-fractures-of-tibia-treated-with-ilizarov-external-fixator
#5
Radosław Górski, Sławomir Żarek, Piotr Modzelewski, Ryszard Górski, Paweł Małdyk
BACKGROUND: Stress fractures are the result of cyclic loading of the bone, which gradually becomes damaged. Most often they are treated by rest or plaster cast and, in rare cases, by internal fixation. There is little published data on initial reposition followed by stabilization with the Ilizarov apparatus in such fractures. MATERIAL AND METHODS: Six patients were treated with an external fixator according to the Ilizarov method for a stress fracture of the tibia between 2007 and 2015...
August 30, 2016: Ortopedia, Traumatologia, Rehabilitacja
https://www.readbyqxmd.com/read/28102162/biomechanical-causes-of-fracture-non-union-after-diaphyseal-forearm-fracture-fixation-an-in-silico-analysis-case-study
#6
Jacek Lorkowski, Tomasz Kuczek, Ireneusz Kotela
: Non-union of forearm bone shaft fractures remains, in some cases, a major clinical problem. The aim of this study was to assess the biomechanical causes of non-union in a patient with diaphyseal forearm fractures fixated with LCP plates. The paper describes the case of a 35-year-old male who developed a non-union as a result of destabilisation of the fixation. The case was analysed with an in silico analysis of the removed fixation device. CONCLUSION: To sum up, we believe that the case described in this paper confirms the limitations to the use of LCP reconstruction plates in patients with well-developed musculature, even in the case of repeat fixation, when good adjustment of the plate well to the axis of the bone appears necessary...
October 28, 2016: Ortopedia, Traumatologia, Rehabilitacja
https://www.readbyqxmd.com/read/28102155/surgical-treatment-of-radial-head-fractures-outcomes-and-complications
#7
Bartosz Chwedczuk, Piotr Piekarczyk, Krzysztof Kwiatkowski, Krzysztof Piątkowski
BACKGROUND: Appropriate treatment of radial head fractures remains an area of disputes and controversy. The present paper aims to assess the outcomes of surgical fixation of these injuries and identify the most common complications. MATERIAL AND METHODS: The medical records of 63 patients (25 women and 38 men) treated in 2011 -2014 were analysed retrospectively. The treatment outcomes were assessed according to the Broberg and Morrey rating system and the QuickDASH score...
October 28, 2016: Ortopedia, Traumatologia, Rehabilitacja
https://www.readbyqxmd.com/read/28102012/visual-perception-of-faces-with-unilateral-and-bilateral-cleft-lip-and-palate-an-eye-tracking-study
#8
Furkan Dindaroğlu, Servet Doğan, Sonia Amado, Ege Doğan
OBJECTIVES: To test the hypotheses that there are differences between orthodontists, individuals with cleft lip and palate (CLP) and laypersons in the visual perception of faces with unilateral (UCLP) and bilateral cleft lip and palate (BCLP), the faces with UCLP and BCLP are visually perceived differently and the hierarchy of visual attention changes when viewing individuals with CLP. SETTING AND SAMPLE POPULATION: Department of Orthodontics and Experimental Psychology at Ege University, İzmir...
February 2017: Orthodontics & Craniofacial Research
https://www.readbyqxmd.com/read/28101830/getting-ahead-of-yourself-parafoveal-word-expectancy-modulates-the-n400-during-sentence-reading
#9
Mallory C Stites, Brennan R Payne, Kara D Federmeier
An important question in the reading literature regards the nature of the semantic information readers can extract from the parafovea (i.e., the next word in a sentence). Recent eye-tracking findings have found a semantic parafoveal preview benefit under many circumstances, and findings from event-related brain potentials (ERPs) also suggest that readers can at least detect semantic anomalies parafoveally (Barber, Van der Meij, & Kutas, Psychophysiology, 50(1), 48-59, 2013). We use ERPs to ask whether fine-grained aspects of semantic expectancy can affect the N400 elicited by a word appearing in the parafovea...
January 18, 2017: Cognitive, Affective & Behavioral Neuroscience
https://www.readbyqxmd.com/read/28101590/-minimally-invasive-treatment-of-intra-articular-calcaneal-fractures-with-the-2%C3%A2-point-distractor
#10
G Mattiassich, W Litzlbauer, M Ponschab, R Ortmaier, C Rodemund
OBJECTIVE: Open treatment of calcaneus fractures often has an increased risk of wound healing. Minimally invasive treatment with small incisions reduces complications. INDICATIONS: Calcaneal fractures with malalignment/comminution >1-2 mm; broadening, varus alignment of the calcaneal length axis or shortening; emergency surgery for open fractures or compartment syndrome. CONTRAINDICATIONS: Local or general contraindications. SURGICAL TECHNIQUE: Standardised positioning; restoration of length/axis with 2‑point distractor under fluoroscopic control...
January 18, 2017: Operative Orthopädie und Traumatologie
https://www.readbyqxmd.com/read/28100943/comparison-of-the-clinical-outcome-and-complications-in-laparoscopic-hernia-repair-of-inguinal-hernia-with-mesh-fixation-using-fibrin-glue-vs-tacker
#11
Prasant Chandra, Deepak Phalgune, Shashank Shah
Although laparoscopic repair offers a quick and less morbid way of treating hernias, complications like hematoma, seroma, neuralgia, recurrence, mesh infection, hydrocele, etc. are known. The present study was undertaken to compare various clinical outcomes between mesh fixation using fibrin glue and mesh fixation with tacker in a 3-months follow-up. One hundred patients aged 18 to 60 years having inguinal hernia admitted in Poona Hospital and Research Centre, Pune, between October 2012 and November 2014 for laparoscopic hernia surgery and ready to participate in this study were included...
December 2016: Indian Journal of Surgery
https://www.readbyqxmd.com/read/28100942/potential-benefits-of-rib-fracture-fixation-in-patients-with-flail-chest-and-multiple-non-flail-rib-fractures
#12
Meiguang Qiu, Zhanjun Shi, Jun Xiao, Xuming Zhang, Shishui Ling, Hao Ling
The purpose of this study is to evaluate the potential benefits of rib fracture fixation in patients with flail chest and multiple non-flail rib fractures versus conventional treatment modalities. A retrospective reviewed study compared 86 cases which received surgical treatment between June 2009 and May 2013 to 76 cases which received conservative treatment between January 2006 and May 2009. The patients were divided into the flail chest (n = 38) and multiple non-flail rib fracture groups (n = 124)...
December 2016: Indian Journal of Surgery
https://www.readbyqxmd.com/read/28100751/decision-related-activity-in-macaque-v2-for-fine-disparity-discrimination-is-not-compatible-with-optimal-linear-readout
#13
Stephane Clery, Bruce G Cumming, Hendrikje Nienborg
: Fine judgments of stereoscopic depth rely mainly on relative judgments of depth (relative binocular disparity) between objects, rather than judgments of the distance to where the eyes are fixating (absolute disparity). In macaques, visual area V2 is the earliest site in the visual processing hierarchy for which neurons selective for relative disparity have been observed (Thomas et al., 2002). Here, we found that, in macaques trained to perform a fine disparity discrimination task, disparity-selective neurons in V2 were highly selective for the task, and their activity correlated with the animals' perceptual decisions (unexplained by the stimulus)...
January 18, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28100746/end-stopping-predicts-curvature-tuning-along-the-ventral-stream
#14
Carlos R Ponce, Till S Hartmann, Margaret S Livingstone
: Neurons in primate inferotemporal cortex (IT) are clustered into patches of shared image preferences. Functional imaging has shown that these patches are activated by natural categories (e.g., faces, body parts, and places), artificial categories (numerals, words) and geometric features (curvature and real-world size). These domains develop in the same cortical locations across monkeys and humans, which raises the possibility of common innate mechanisms. Although these commonalities could be high-level template-based categories, it is alternatively possible that the domain locations are constrained by low-level properties such as end-stopping, eccentricity, and the shape of the preferred images...
January 18, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28100742/visual-sampling-predicts-hippocampal-activity
#15
Zhong-Xu Liu, Kelly Shen, Rosanna K Olsen, Jennifer D Ryan
: Eye movements serve to accumulate information from the visual world, contributing to the formation of coherent memory representations that support cognition and behavior. The hippocampus and the oculomotor network are well connected anatomically through an extensive set of polysynaptic pathways. However, the extent to which visual sampling behavior is related to functional responses in the hippocampus during encoding has not been studied directly in human neuroimaging. In the current study, participants engaged in a face processing task while brain responses were recorded with fMRI and eye movements were monitored simultaneously...
January 18, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28100591/dynamics-and-fate-of-beneficial-mutations-under-lineage-contamination-by-linked-deleterious-mutations
#16
Sophie Pénisson, Tanya Singh, Paul Sniegowski, Philip Gerrish
Beneficial mutations drive adaptive evolution, yet their selective advantage does not ensure their fixation. Haldane's application of single-type branching process theory showed that genetic drift alone could cause the extinction of newly-arising beneficial mutations with high probability. With linkage, deleterious mutations will affect the dynamics of beneficial mutations and might further increase their extinction probability. Here, we model the lineage dynamics of a newly-arising beneficial mutation as a multitype branching process...
January 18, 2017: Genetics
https://www.readbyqxmd.com/read/28100253/minimally-invasive-percutaneous-osteosynthesis-versus-orif-for-sanders-type-ii-and-iii-calcaneal-fractures-a-prospective-randomized-intervention-trial
#17
Cong Jin, Dong Weng, Wanlei Yang, Wei He, Wengqing Liang, Yu Qian
BACKGROUND: This randomized controlled trial compared the clinical outcomes and complications of a novel minimally invasive percutaneous osteosynthesis (MIPO) with those of conventional treatment via an extended L-shaped lateral approach for calcaneal fractures. METHODS: Sixty-four patients with displaced intraarticular calcaneal fractures were enrolled. The patients were randomly allocated to receive either MIPO (29 patients) or open reduction and internal fixation via an extended L-shaped lateral approach (35 patients)...
January 18, 2017: Journal of Orthopaedic Surgery and Research
https://www.readbyqxmd.com/read/28100234/arthroscopic-reduction-and-fixation-of-coronoid-fractures-with-an-exchange-rod-a-new-technique
#18
Kan Ouyang, Daping Wang, Wei Lu, Jianyi Xiong, Jian Xu, Liangquan Peng, Haifeng Liu, Hao Li, Wenzhe Feng
BACKGROUND: The ulnar coronoid process plays a central role in maintaining elbow stability. Some of its fractures were often combined with injury of bone and ligament. Arthroscopy enables perfect visualization to allow anatomical repair. METHODS: From January 2012 to December 2013, six patients (four males, two females) with a mean age of 26.6 years were treated. The left and right ulnas were involved in two and four patients, respectively. All patients suffered from ipsilateral subluxation of the elbow without associated radial fracture...
January 18, 2017: Journal of Orthopaedic Surgery and Research
https://www.readbyqxmd.com/read/28099751/postoperative-anatomic-and-quality-of-life-outcomes-after-vaginal-sacrocolporectopexy-for-vaginal-vault-prolapse
#19
Rüdiger Klapdor, Jolanda Grosse, Bettina Hertel, Peter Hillemanns, Hermann Hertel
OBJECTIVE: To assess anatomic outcome and quality of life (QOL) after vaginal sacrocolporectopexy among patients with pelvic organ prolapse. METHODS: A noncomparative observational study was conducted at Hanover Medical School, Germany, among patients who underwent vaginal sacrocolporectopexy for uterine or vaginal vault prolapse between May 1, 2006, and October 31, 2012. A validated German version of the Prolapse QOL (P-QOL) questionnaire was sent to eligible patients; respondents were invited for follow-up examination...
January 6, 2017: International Journal of Gynaecology and Obstetrics
https://www.readbyqxmd.com/read/28099748/medium-term-outcomes-of-laparoscopic-sacrocolpopexy-or-sacrohysteropexy-versus-vaginal-sacrospinous-ligament-fixation-for-middle-compartment-prolapse
#20
Chen Yisong, Hua Keqin
OBJECTIVE: To compare laparoscopic sacrocolpopexy (LSC) or sacrohysteropexy (LSH) with vaginal sacrospinous ligament fixation (VSSLF) for middle compartment pelvic organ prolapse (POP). METHODS: Data were retrospectively reviewed from patients with POP (stage 3 or worse) who underwent LSC, LSH, or VSSLF at a center in Shanghai between January 2009 and March 2014. POP quantification (POP-Q) and Pelvic Floor Distress Inventory scores were compared at the 2-year follow-up...
January 6, 2017: International Journal of Gynaecology and Obstetrics
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