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https://www.readbyqxmd.com/read/28528459/on-the-contribution-of-overt-tactile-expectations-to-visuo-tactile-interactions-within-the-peripersonal-space
#1
Manasa Kandula, Nathan Van der Stoep, Dennis Hofman, H C Dijkerman
Since the discovery of neural regions in the monkey brain that respond preferentially to multisensory stimuli presented in proximal space, researchers have been studying this specialised spatial representation in humans. It has been demonstrated that approaching auditory or visual stimuli modulate tactile processing, while they are within the peripersonal space (PPS). The aim of the current study is to investigate the additional effects of tactile expectation on the PPS-related multisensory interactions. Based on the output of a computational simulation, we expected that as tactile expectation increases rapidly during the course of the motion of the visual stimulus, the outcome RT curves would mask the multisensory contribution of PPS...
May 20, 2017: Experimental Brain Research. Experimentelle Hirnforschung. Expérimentation Cérébrale
https://www.readbyqxmd.com/read/28528238/effects-of-grab-bar-on-utilized-friction-and-dynamic-stability-when-elderly-people-enter-the-bathtub
#2
Yusuke Sekiguchi, Tomohisa Kato, Keita Honda, Hiroyasu Kanetaka, Shin-Ichi Izumi
BACKGROUND: The effect of the grab bar on dynamic stability when elderly people enter the bathtub remains unclear. The purpose of the present study is to examine the age-related effect of the grab bar on dynamic stability during lateral stepping over an obstacle when entering bathtub. METHODS: Sixteen young, healthy adults and sixteen elderly adults participated. The subjects performed lateral stepping over an obstacle with and without vertical and horizontal bars...
May 10, 2017: Clinical Biomechanics
https://www.readbyqxmd.com/read/28528016/the-influence-of-humeral-neck-shaft-angle-and-glenoid-lateralization-on-range-of-motion-in-reverse-shoulder-arthroplasty
#3
Birgit S Werner, Jean Chaoui, Gilles Walch
BACKGROUND: Recent developments in reverse shoulder arthroplasty (RSA) have focused on changes in several design-related parameters, including humeral component design, to allow for easier convertibility. Alterations in humeral inclination and offset on shoulder kinematics may have a relevant influence on postoperative outcome. This study used a virtual computer simulation to evaluate the influence of humeral neck shaft angle and glenoid lateralization on range of motion in onlay design RSA...
May 17, 2017: Journal of Shoulder and Elbow Surgery
https://www.readbyqxmd.com/read/28527449/correlated-matrix-fluctuation-mediated-activated-transport-of-dilute-penetrants-in-glass-forming-liquids-and-suspensions
#4
Rui Zhang, Kenneth S Schweizer
We formulate a microscopic, force-level statistical mechanical theory for the activated diffusion of dilute penetrants in dense liquids, colloidal suspensions, and glasses. The approach explicitly and self-consistently accounts for coupling between penetrant hopping and matrix dynamic displacements that actively facilitate the hopping event. The key new ideas involve two mechanistically (at a stochastic trajectory level) coupled dynamic free energy functions for the matrix and spherical penetrant particles...
May 21, 2017: Journal of Chemical Physics
https://www.readbyqxmd.com/read/28525476/magnetic-resonance-classification-system-of-cervical-intervertebral-disk-degeneration-its-validity-and-meaning
#5
Akinobu Suzuki, Michael D Daubs, Tetsuo Hayashi, Monchai Ruangchainikom, Chenjie Xiong, Kevin Phan, Trevor P Scott, Jeffery C Wang
STUDY DESIGN: Retrospective analysis of kinetic magnetic resonance images (kMRIs). OBJECTIVE: (1) To analyze the changes seen on MRI related to disk degeneration and to develop a new grading system for cervical disk degeneration. (2) To evaluate the reliability and validity of the grading system. SUMMARY OF BACKGROUND DATA: Few have studied the relationship between changes seen on MRI with cervical disk degeneration and the chronological order of disk degeneration...
June 2017: Clinical Spine Surgery
https://www.readbyqxmd.com/read/28525473/is-total-disk-replacement-a-cost-effective-treatment-for-cervical-degenerative-disk-disease
#6
Bernd Wiedenhöfer, Joachim Nacke, Mike Stephan, Wiltrud Richter, Claus Carstens, Markus Eichler
STUDY DESIGN: A retrospective study. OBJECTIVE: The objective of this study was to assess the cost-effectiveness and clinical outcome of motion-preserving versus fusion procedures in cervical spine surgery. SUMMARY OF BACKGROUND DATA: During the last decade there has been a huge growth in spine surgery with a concurrent increase in the economic burden. Currently, there appear to be no differences in clinical outcome between cervical total disk replacement (TDR) and spinal fusion (SF)...
June 2017: Clinical Spine Surgery
https://www.readbyqxmd.com/read/28524620/clinical-performance-and-survivorship-of-navigated-floating-platform-mobile-bearing-total-knee-arthroplasty-a-minimum-10-year-follow-up
#7
Sang-Min Kim, Jai-Gon Seo, Seung-Jae Lim, Hyung-Tae Lim, Chang-Ho Cho, Young-Wan Moon
BACKGROUND: The purpose of this study is to report the outcome of navigation-assisted cruciate-retaining total knee arthroplasty (TKA) using one type of cemented, second-generation, floating-platform (FP), mobile-bearing system. METHODS: Forty-two patients who underwent cruciate retaining TKAs using e.motion-FP prostheses under navigational guidance were retrospectively reviewed. The preoperative diagnosis was osteoarthritis in all knees except one rheumatoid arthritis...
May 19, 2017: International Journal of Medical Robotics + Computer Assisted Surgery: MRCAS
https://www.readbyqxmd.com/read/28524264/maternal-occupational-physical-activity-and-risk-for-orofacial-clefts
#8
A J Agopian, Jihye Kim, Peter H Langlois, Laura Lee, Lawrence W Whitehead, Elaine Symanski, Michele L Herdt, George L Delclos
OBJECTIVES: To perform a case-control study of maternal occupational physical activity and risk for orofacial clefts in Texas during 1999-2009. METHODS: We used logistic regression to assess 14 measures of physical activity estimated from a job exposure matrix, using the maternal occupation reported on the birth certificate, among 887 children with cleft lip with or without cleft palate (CLP), 436 children with cleft palate only (CP), and 1932 controls. RESULTS: After adjusting for several potential confounders, seven measures of physical activity (as a categorical and/or continuous variable) were significantly associated with CLP, CP, or both...
May 19, 2017: American Journal of Industrial Medicine
https://www.readbyqxmd.com/read/28523427/-total-ankle-arthroplasty-with-simultaneous-subtalar-fusion
#9
J Mainzer, P Rippstein
OBJECTIVE: Pain free weight bearing ability with orthograde hindfoot position and preserved tibiotalar motion. INDICATIONS: Symptomatic arthritis of the ankle and subtalar joint, additional subtalar hindfoot malalignment. CONTRAINDICATIONS: Absolute: acute infection, noncorrectable ligamentous instability or bony defects, restricted perfusion, diabetic foot syndrome. Relative: inability to comply with postoperative partial weight bearing, only moderate symptoms of subtalar arthritis, smoking, intricate soft tissue situation...
May 18, 2017: Operative Orthopädie und Traumatologie
https://www.readbyqxmd.com/read/28523314/health-related-quality-of-life-in-patients-with-hallux-valgus
#10
Lavinia Maria Hogea, Bogdan Gheorghe Hogea, Laura Alexandra Nussbaum, Mirela Loredana Grigoraş, Bogdan Corneliu Andor, Codrina Mihaela Levai, Ana Cristina Bredicean
BACKGROUND AND AIMS: No deformity of the forefoot occurs more frequently than hallux valgus (HV), which is considered to be medial deviation of the first metatarsal and lateral deviation and rotation of the hallux, either with or without medial soft tissue enlargement of the metatarsal head. The HV deformity can lead to painful motion of the joint or difficulty in daily joint activity that often requires surgical correction. The aims of this study were to investigate the levels of foot pain and quality of life of patients with HV before and after surgery...
2017: Romanian Journal of Morphology and Embryology, Revue Roumaine de Morphologie et Embryologie
https://www.readbyqxmd.com/read/28521803/physical-interface-dynamics-alter-how-robotic-exosuits-augment-human-movement-implications-for-optimizing-wearable-assistive-devices
#11
Matthew B Yandell, Brendan T Quinlivan, Dmitry Popov, Conor Walsh, Karl E Zelik
BACKGROUND: Wearable assistive devices have demonstrated the potential to improve mobility outcomes for individuals with disabilities, and to augment healthy human performance; however, these benefits depend on how effectively power is transmitted from the device to the human user. Quantifying and understanding this power transmission is challenging due to complex human-device interface dynamics that occur as biological tissues and physical interface materials deform and displace under load, absorbing and returning power...
May 18, 2017: Journal of Neuroengineering and Rehabilitation
https://www.readbyqxmd.com/read/28521092/spontaneous-rotation-of-non-linear-pattern-formed-by-aqueous-colloidal-suspension-between-ito-electrodes-during-electrolysis-perpendicular-to-gravity
#12
Kazuya Sasaki, Shuichi Sato, Takahiro Shindo, Takeo Sakawa, Hiromu Sasaki, Masahito Sano
A colloidal fluid is found to rotate spontaneously during electrolysis when gravity acts perpendicular to the direction of an applied electric field. An aqueous dispersion containing charged colloidal particles is placed inside an O-ring sandwiched between two parallel ITO electrodes. A clip is used to hold the assembly together to prevent the liquid from leaking out. The assembly is positioned such that the electrodes stand vertically, i.e., the electric field during electrolysis points perpendicular to gravity...
May 18, 2017: Journal of Physical Chemistry. B
https://www.readbyqxmd.com/read/28520558/data-driven-event-by-event-respiratory-motion-correction-using-tof-pet-list-mode-centroid-of-distribution
#13
Silin Ren, Xiao Jin, Chung Chan, Yiqiang Jian, Tim Mulnix, Chi Liu, Richard E Carson
Data-driven respiratory gating techniques were developed to correct for respiratory motion in PET studies, without the help of external motion tracking systems. Due to the greatly increased image noise in gated reconstructions, it is desirable to develop a data-driven event-by-event respiratory motion correction method. In this study, using the Centroid-of-distribution (COD) algorithm, we established a data-driven event-by-event respiratory motion correction technique using TOF PET list-mode data, and investigated its performance by comparing with an external system-based correction method...
May 18, 2017: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/28520461/clinical-outcome-after-arthroscopic-debridement-and-microfracture-for-osteochondritis-dissecans-of-the-capitellum
#14
Rens Bexkens, Kim I M van den Ende, Paul T Ogink, Christiaan J A van Bergen, Michel P J van den Bekerom, Denise Eygendaal
BACKGROUND: Various surgical treatment techniques have been developed to treat capitellar osteochondritis dissecans; however, the optimal technique remains the subject of ongoing debate. PURPOSE: To evaluate clinical outcomes after arthroscopic debridement and microfracture for advanced capitellar osteochondritis dissecans. STUDY DESIGN: Case series; Level of evidence, 4. METHODS: Between 2008 and 2015, the authors followed 77 consecutive patients (81 elbows) who underwent arthroscopic debridement and microfracture, and loose body removal if needed, for advanced capitellar osteochondritis dissecans...
May 1, 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/28516050/towards-mri-temperature-mapping-in-real-time-the-proton-resonance-frequency-method-with-undersampled-radial-mri-and-nonlinear-inverse-reconstruction
#15
Zhongshuai Zhang, Thomas Michaelis, Jens Frahm
BACKGROUND: Optimal control of minimally invasive interventions by hyperthermia requires dynamic temperature mapping at high temporal resolution. METHODS: Based on the temperature-dependent shift of the proton resonance frequency (PRF), this work developed a method for real-time MRI thermometry which relies on highly undersampled radial FLASH MRI sequences with iterative image reconstruction by regularized nonlinear inversion (NLINV). As a first step, the method was validated with use of a temperature phantom and ex vivo organs (swine kidney) subjected to heating by warm water or a pulsed laser source...
April 2017: Quantitative Imaging in Medicine and Surgery
https://www.readbyqxmd.com/read/28515287/context-effects-on-smooth-pursuit-and-manual-interception-of-a-disappearing-target
#16
Philipp Kreyenmeier, Jolande Fooken, Miriam Spering
In our natural environment, we interact with moving objects that are surrounded by richly textured, dynamic visual contexts. Yet, most laboratory studies on vision and movement show visual objects in front of uniform grey backgrounds. Context effects on eye movements have been widely studied, but it is less well known how visual contexts affect hand movements. Here we ask whether eye and hand movements integrate motion signals from target and context similarly or differently, and whether context effects on eye and hand change over time...
May 17, 2017: Journal of Neurophysiology
https://www.readbyqxmd.com/read/28515238/labrid-cleaner-fishes-show-kinematic-convergence-as-juveniles-despite-variation-in-morphology
#17
Vikram B Baliga, Ze'ev J Bernstein, Shivani Sundaram, Rita S Mehta
Cleaning, a dietary strategy in which ectoparasites or mucous are removed and consumed off other taxa, is performed facultatively or obligately in a variety of species. We explored whether species in the Labridae (wrasses, parrotfishes) of varying ecological specialization employ similar mechanisms of prey capture. In investigating feeding on attached prey among juveniles of 19 species of wrasses, we found that patterns of biting in wrasses are influenced by the interaction between the maxilla and a feature of the premaxilla which we term the maxillary crest...
May 17, 2017: Journal of Experimental Biology
https://www.readbyqxmd.com/read/28514733/role-of-intravoxel-incoherent-motion-mr-imaging-in-preoperative-assessing-her2-status-of-gastric-cancers
#18
Changfeng Ji, Qinglei Zhang, Wenxian Guan, Tingting Guo, Ling Chen, Song Liu, Jian He, Zhengyang Zhou
PURPOSE: To explore the role of intravoxel incoherent motion (IVIM) magnetic resonance (MR) imaging in evaluating human epidermal growth factor receptor 2 (HER2) status of gastric cancers preoperatively. RESULTS: The apparent diffusion coefficient (ADC) and pure diffusion coefficient (D) values correlated positively with HER2 scores of gastric cancers significantly (r = 0.276, P = 0.048; r = 0.481, P < 0.001, respectively). The ADC and D values of HER2 positive gastric cancers were significantly higher than those of HER2 negative tumors (P = 0...
May 2, 2017: Oncotarget
https://www.readbyqxmd.com/read/28514292/isolated-olecranon-fractures-in-children-affected-by-osteogenesis-imperfecta-type-i-treated-with-single-screw-or-tension-band-wiring-system-outcomes-and-pitfalls-in-relation-to-bone-mineral-density
#19
Pietro Persiani, Filippo M Ranaldi, Jole Graci, Claudia De Cristo, Anna Zambrano, Patrizia D'Eufemia, Lorena Martini, Ciro Villani
The purpose of this study is to compare the results of 2 techniques, tension band wiring (TBW) and fixation with screws, in olecranon fractures in children affected with osteogenesis imperfecta (OI) type I. Between 2010 and 2014, 21 olecranon fractures in 18 children with OI (average age: 12 years old) were treated surgically. Ten patients were treated with the screw fixation and 11 with TBW. A total of 65% of olecranon fractures occurred as a result of a spontaneous avulsion of the olecranon during the contraction of the triceps muscle...
May 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28514063/where-are-you-heading-flexible-integration-of-retinal-and-extra-retinal-cues-during-self-motion-perception
#20
Shenbing Kuang, Jinfu Shi, Yang Wang, Tao Zhang
As we move forward in the environment, we experience a radial expansion of the retinal image, wherein the center corresponds to the instantaneous direction of self-motion. Humans can precisely perceive their heading direction even when the retinal motion is distorted by gaze shifts due to eye/body rotations. Previous studies have suggested that both retinal and extra-retinal strategies can compensate for the retinal image distortion. However, the relative contributions of each strategy remain unclear. To address this issue, we devised a two-alternative-headings discrimination task, in which participants had either real or simulated pursuit eye movements...
May 17, 2017: PsyCh Journal
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