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https://www.readbyqxmd.com/read/28231479/intermittent-bilateral-coherence-in-physiological-and-essential-hand-tremor
#1
Soma Chakraborty, Jana Kopecká, Otakar Šprdlík, Martina Hoskovcová, Olga Ulmanová, Evžen Růžička, Martin Zapotocky
OBJECTIVE: To investigate the prevalence and the temporal structure of bilateral coherence in physiological (PT) and essential (ET) hand tremor. METHODS: Triaxial accelerometric recordings from both hands in 30 healthy subjects and 34 ET patients were analyzed using spectral coherence and wavelet coherence methods. In 12 additional healthy subjects, the relation between the hand tremor and the chest wall acceleration was evaluated using partial coherence analysis...
January 14, 2017: Clinical Neurophysiology: Official Journal of the International Federation of Clinical Neurophysiology
https://www.readbyqxmd.com/read/28231402/ex-vivo-visualization-of-human-ciliated-epithelium-and-quantitative-analysis-of-induced-flow-dynamics-by-using-optical-coherence-tomography
#2
Yuye Ling, Xinwen Yao, Ute A Gamm, Emilio Arteaga-Solis, Charles W Emala, Michael A Choma, Christine P Hendon
BACKGROUND AND OBJECTIVE: Cilia-driven mucociliary clearance is an important self-defense mechanism of great clinical importance in pulmonary research. Conventional light microscopy possesses the capability to visualize individual cilia and its beating pattern but lacks the throughput to assess the global ciliary activities and flow dynamics. Optical coherence tomography (OCT), which provides depth-resolved cross-sectional images, was recently introduced to this area. MATERIALS AND METHODS: Fourteen de-identified human tracheobronchial tissues are directly imaged by two OCT systems: one system centered at 1,300 nm with 6...
February 23, 2017: Lasers in Surgery and Medicine
https://www.readbyqxmd.com/read/28231390/intraoperative-assessment-of-laryngeal-pathologies-with-optical-coherence-tomography-integrated-into-a-surgical-microscope
#3
Anna S Englhard, Tom Betz, Veronika Volgger, Eva Lankenau, Georg J Ledderose, Herbert Stepp, Christian Homann, Christian S Betz
OBJECTIVE: Endoscopic examination followed by tissue biopsy is the gold standard in the evaluation of lesions of the upper aerodigestive tract. However, it can be difficult to distinguish between healthy mucosa, dysplasia, and invasive carcinoma. Optical coherence tomography (OCT) is a non-invasive technique which acquires high-resolution, cross-sectional images of tissue in vivo. Integrated into a surgical microscope, it allows the intraoperative evaluation of lesions simultaneously with microscopic visualization...
February 23, 2017: Lasers in Surgery and Medicine
https://www.readbyqxmd.com/read/28231267/accuracy-of-optical-biometry-combined-with-placido-disc-corneal-topography-for-intraocular-lens-power-calculation
#4
Giacomo Savini, Kenneth J Hoffer, Piero Barboni, Nicole Balducci, Domenico Schiano-Lomoriello, Pietro Ducoli
PURPOSE: To investigate the accuracy of a new optical biometer for intraocular lens (IOL) power calculation in eyes undergoing cataract surgery. METHODS: Consecutive eyes of patients undergoing cataract surgery with the same IOL model were enrolled in a prospective cohort study. Axial length (AL) and corneal power were measured with an optical biometer based on optical low-coherence interferometry and Placido-disc corneal topography. IOL power was calculated with the Hoffer Q, Holladay 1 and SRK/T formulas...
2017: PloS One
https://www.readbyqxmd.com/read/28231135/changes-in-food-intake-in-australia-comparing-the-1995-and-2011-national-nutrition-survey-results-disaggregated-into-basic-foods
#5
Bradley Ridoutt, Danielle Baird, Kathryn Bastiaans, Gilly Hendrie, Malcolm Riley, Peerasak Sanguansri, Julie Syrette, Manny Noakes
As nations seek to address obesity and diet-related chronic disease, understanding shifts in food intake over time is an imperative. However, quantifying intake of basic foods is not straightforward because of the diversity of raw and cooked wholefoods, processed foods and mixed dishes actually consumed. In this study, data from the Australian national nutrition surveys of 1995 and 2011, each involving more than 12,000 individuals and covering more than 4500 separate foods, were coherently disaggregated into basic foods, with cooking and processing factors applied where necessary...
May 25, 2016: Foods (Basel, Switzerland)
https://www.readbyqxmd.com/read/28231017/boosting-hole-mobility-in-coherently-strained-110-oriented-ge-si-core-shell-nanowires
#6
Sonia Conesa-Boj, Ang Li, Sebastian Koelling, Matthias Brauns, Joost Ridderbos, Ton T Nguyen, Marcel A Verheijen, Paul M Koenraad, Floris Arnoud Zwanenburg, Erik P A M Bakkers
The ability of core-shell nanowires to overcome existing limitations of heterostructures is one of the key ingredients for the design of next generation devices. This requires a detailed understanding of the mechanism for strain relaxation in these systems, in order to eliminate strain-induced defect formation and thus to boost important electronic properties such as carrier mobility. Here we demonstrate how the hole mobility of [110]-oriented Ge-Si core-shell nanowires can be substantially enhanced thanks to the realization of large band offset and coherent strain in the system, reaching values as high as 4200 cm(2)/(Vs) at 4K and 1600 cm(2)/(Vs) at room temperature for high hole densities of 1019 cm(-3)...
February 23, 2017: Nano Letters
https://www.readbyqxmd.com/read/28230836/corrigendum-automated-internal-classification-of-beadless-chinese-zhuji-freshwater-pearls-based-on-optical-coherence-tomography-images
#7
Yang Zhou, Tiebing Liu, Yang Shi, Zhengwei Chen, Jianwei Mao, Wujie Zhou
No abstract text is available yet for this article.
February 23, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28230441/exploring-salutogenesis-as-a-concept-of-health-and-wellbeing-in-nurses-who-thrive-professionally
#8
Eleanor Stock
AIM: To determine whether salutogenesis, a concept of health and wellbeing, can be identified in nurses who self-describe as thriving professionally. BACKGROUND: Nurse burnout can potentially impact clinical performance, patient safety, and increase the turnover of nurses, which all contribute to additional healthcare costs. The ability to not only avoid burnout, but to thrive in stressful environments is an important factor worth exploring. The salutogenic concept is related to this...
February 23, 2017: British Journal of Nursing: BJN
https://www.readbyqxmd.com/read/28230188/3d-time-lapse-imaging-and-quantification-of-mitochondrial-dynamics
#9
Miguel Sison, Sabyasachi Chakrabortty, Jérôme Extermann, Amir Nahas, Paul James Marchand, Antonio Lopez, Tanja Weil, Theo Lasser
We present a 3D time-lapse imaging method for monitoring mitochondrial dynamics in living HeLa cells based on photothermal optical coherence microscopy and using novel surface functionalization of gold nanoparticles. The biocompatible protein-based biopolymer coating contains multiple functional groups which impart better cellular uptake and mitochondria targeting efficiency. The high stability of the gold nanoparticles allows continuous imaging over an extended time up to 3000 seconds without significant cell damage...
February 23, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28230070/an-fmri-compatible-force-measurement-system-for-the-evaluation-of-the-neural-correlates-of-step-initiation
#10
Andrea Cristina de Lima-Pardini, Raymundo Machado de Azevedo Neto, Daniel Boari Coelho, Catarina Costa Boffino, Sukhwinder S Shergill, Carolina de Oliveira Souza, Rachael Brant, Egberto Reis Barbosa, Ellison Fernando Cardoso, Luis Augusto Teixeira, Rajal G Cohen, Fay Bahling Horak, Edson Amaro
Knowledge of brain correlates of postural control is limited by the technical difficulties in performing controlled experiments with currently available neuroimaging methods. Here we present a system that allows the measurement of anticipatory postural adjustment of human legs to be synchronized with the acquisition of functional magnetic resonance imaging data. The device is composed of Magnetic Resonance Imaging (MRI) compatible force sensors able to measure the level of force applied by both feet. We tested the device in a group of healthy young subjects and a group of elderly subjects with Parkinson's disease using an event-related functional MRI (fMRI) experiment design...
February 23, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28230055/corrigendum-optical-coherence-tomography-angiography-microvascular-findings-in-macular-edema-due-to-central-and-branch-retinal-vein-occlusions
#11
Rodolfo Mastropasqua, Lisa Toto, Luca Di Antonio, Enrico Borrelli, Alfonso Senatore, Marta Di Nicola, Giuseppe Di Martino, Marco Ciancaglini, Paolo Carpineto
No abstract text is available yet for this article.
February 23, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28230047/electrically-tunable-artificial-gauge-potential-for-polaritons
#12
Hyang-Tag Lim, Emre Togan, Martin Kroner, Javier Miguel-Sanchez, Atac Imamoğlu
Neutral particles subject to artificial gauge potentials can behave as charged particles in magnetic fields. This fascinating premise has led to demonstrations of one-way waveguides, topologically protected edge states and Landau levels for photons. In ultracold neutral atoms, effective gauge fields have allowed the emulation of matter under strong magnetic fields leading to realization of Harper-Hofstadter and Haldane models. Here we show that application of perpendicular electric and magnetic fields effects a tunable artificial gauge potential for two-dimensional microcavity exciton polaritons...
February 23, 2017: Nature Communications
https://www.readbyqxmd.com/read/28229955/three-dimensional-colloidal-lithography
#13
Hironori Nagai, Austen Poteet, Xu A Zhang, Chih-Hao Chang
Light interactions with colloidal particles can generate a variety of complex three-dimensional (3D) intensity patterns, which can be utilized for nanolithography. The study of particle-light interactions can add more types of intensity patterns by manipulating key factors. Here we investigate a novel 3D nanolithography technique using colloidal particles under two-beam coherent illuminations. The fabricated 3D nanostructures are hollow, nested within periodic structures, and possess multiple chamber geometry...
February 23, 2017: Nanotechnology
https://www.readbyqxmd.com/read/28229400/trans-synaptic-retrograde-degeneration-in-the-human-visual-system-slow-silent-and-real
#14
REVIEW
Marc Dinkin
Degeneration of neuron and axons following injury to cells with which they synapse is termed trans-synaptic degeneration. This phenomenon may be seen in postsynaptic neurons (anterograde) or in presynaptic neurons (retrograde). Retrograde trans-synaptic degeneration (RTSD) of the retinal ganglion cells and retinal nerve fiber layer following injury to the occipital lobe has been well documented histologically in animal studies, but its occurrence in the human retina was, for many years, felt to be limited to cases of neonatal injury during a critical period of neuronal development...
February 2017: Current Neurology and Neuroscience Reports
https://www.readbyqxmd.com/read/28229056/experimental-visualization-of-labyrinthine-structure-with-optical-coherence-tomography
#15
Saleh Mohebbi, Marjan Mirsalehi, Lüder-Alexander Kahrs, Tobias Ortmaier, Thomas Lenarz, Omid Majdani
INTRODUCTION: Visualization of inner ear structures is a valuable strategy for researchers and clinicians working on hearing pathologies. Optical coherence tomography (OCT) is a high-resolution imaging technology which may be used for the visualization of tissues. In this experimental study we aimed to evaluate inner ear anatomy in well-prepared human labyrinthine bones. MATERIALS AND METHODS: Three fresh human explanted temporal bones were trimmed, chemically decalcified with ethylenediaminetetraacetic acid (EDTA), and mechanically drilled under visual control using OCT in order to reveal the remaining bone shell...
January 2017: Iranian Journal of Otorhinolaryngology
https://www.readbyqxmd.com/read/28228833/disruption-of-the-photoreceptor-inner-segment-outer-segment-junction-in-a-6-year-old-girl-with-joubert-syndrome
#16
Shimpei Baba, Eri Takeshita, Hiroko Yamazaki, Mikako Tarashima, Masayuki Sasaki
Joubert syndrome (JS) is a spectrum of genetic disorders characterised by cerebellar and brainstem malformation called "molar tooth sign", resulting in hypotonia, developmental delay, and intellectual disability. Here we describe a young female JS patient with "salt-and-pepper" fundus and inner segment-outer segment junction (IS/OS line) discontinuity, with a lack of external limiting membrane. Ocular coherence tomography (OCT) detected blurred external retinal layers in the macula centre. Although JS patients often have retinal degeneration with varying severity, few investigators have utilised OCT in their investigations...
February 2017: Neuro-ophthalmology
https://www.readbyqxmd.com/read/28228831/retinal-nerve-fibre-layer-thickness-of-migraine-patients-with-or-without-white-matter-lesions
#17
Ilke Bahceci Simsek
The aim of this study was to determine whether retinal nerve fibre layer (RNFL) thickness is correlated with cerebral white matter lesions (WML) in migraine patients. Forty migraine and 40 healthy subjects were included in this study. The difference in RNFL thickness between the control and a migraine group with WML and a migraine group without WML were investigated using analysis of variance (ANOVA). A Tukey post hoc test was conducted to determine from which group the difference originated. Lower RNFL thicknesses were observed in the migraine patient group where WML was detected using magnetic resonance imaging (MRI), compared with the control group and with the migraine group with no WML...
February 2017: Neuro-ophthalmology
https://www.readbyqxmd.com/read/28228830/optic-disc-and-macular-imaging-in-blind-eyes-from-non-glaucomatous-optic-neuropathy-a-study-with-spectral-domain-optical-coherence-tomography
#18
Linda Hansapinyo, Andy C O Cheng, Noel C Y Chan, Carmen K M Chan
The purpose of this study was to determine and compare the optic disc and macular thickness measurements using two spectral-domain optical coherence tomography (SD-OCT) instruments in long-standing blind eyes diagnosed with non-glaucomatous optic neuropathies (NGON). A prospective observational case-series design was used. Twelve eyes from 12 NGON patients with no light perception for at least 6 months underwent optic disc and macular imaging with Cirrus HD-OCT and Spectralis OCT. The correlation between the peripapillary retinal nerve fibre layer (PRNFL) and macular ganglion cell layer and inner plexiform layer (GCL+IPL) thicknesses, and between the duration of no light perception (NLP) and PRNFL/GCL+IPL thicknesses were determined using Spearman's correlation analysis...
February 2017: Neuro-ophthalmology
https://www.readbyqxmd.com/read/28228436/triamcinolone-emboli-leading-to-central-retinal-artery-occlusion-a-multimodal-imaging-study
#19
Nripen Gaur, Pallavi Singh, Rohan Chawla, Brijesh Takkar
A 19-year-old man presented with unilateral sudden onset vision loss following an intra-articular triamcinolone injection in the right temporomandibular joint. At fundus examination emboli of triamcinolone were visible in multiple retinal arteries. Choroidal ischaemia and occlusion of the central retinal artery and its branches were documented at fluorescein angiography. Optical coherence tomography revealed significant thickening of the inner retinal layers. Optical coherence tomography angiography clearly demonstrated an abrupt cut-off of flow in a vessel below the optic disc...
February 22, 2017: BMJ Case Reports
https://www.readbyqxmd.com/read/28228408/a-method-for-quantifying-limbal-stem-cell-niches-using-oct-imaging
#20
Michel Haagdorens, Joséphine Behaegel, Jos Rozema, Veerle Van Gerwen, Sofie Michiels, Sorcha Ní Dhubhghaill, Marie-José Tassignon, Nadia Zakaria
AIMS: To evaluate the efficacy of Fourier domain-optical coherence tomography (FD-OCT) in imaging and quantifying the limbal palisades of Vogt and to correlate these images with histological findings. METHODS: The superior and inferior limbal region of both eyes of 50 healthy volunteers were imaged by FD-OCT. Images were processed and analysed using Matlab software. In vitro immunofluorescent staining of a cadaveric donor limbus was analysed to correlate the presence of stem cells in the visualised structures...
February 22, 2017: British Journal of Ophthalmology
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