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https://www.readbyqxmd.com/read/28105655/imperfect-de-convolution-may-introduce-spurious-psychophysiological-interactions-and-how-to-avoid-it
#1
Xin Di, Richard C Reynolds, Bharat B Biswal
Psychophysiological interaction (PPI) is a widely used regression-based method to study connectivity changes in different experimental conditions. A PPI effect is generated by point-by-point multiplication of a psychological variable (experimental design) and a physiological variable (time series of a seed region). If the psychological variable is non-centered with a constant component, the constant component will add a physiological variable to the PPI term. The physiological component would in theory be accounted for by the physiological main effect in the model...
January 20, 2017: Human Brain Mapping
https://www.readbyqxmd.com/read/28098494/constant-and-variable-time-delays-of-synchrony-of-facial-expressions-in-dyadic-conversations
#2
M Joseph Meyer
No abstract text is available yet for this article.
January 18, 2017: Multivariate Behavioral Research
https://www.readbyqxmd.com/read/28097673/schoolyard-shade-and-sun-exposure-assessment-of-personal-monitoring-during-children-s-physical-activity
#3
Jennifer K Vanos, Grant R McKercher, Kylie Naughton, Marc Lochbaum
Childhood exposure to ultraviolet radiation (UVR) is a major risk factor for the development of melanoma later in life. However, it is challenging to accurately determine personal outdoor exposure to UVR, specifically erythemally-weighted UVR (UVEry ), due to technological constraints, variable time-activity patterns, and the influence of outdoor environmental design. To address this challenge, the current study utilized mobile and stationary techniques to examine the UVEry exposures of 14 children in a schoolyard in Lubbock, TX in spring 2016...
January 18, 2017: Photochemistry and Photobiology
https://www.readbyqxmd.com/read/28096408/rhythm-judgments-reveal-a-frequency-asymmetry-in-the-perception-and-neural-coding-of-sound-synchrony
#4
Magdalena Wojtczak, Anahita H Mehta, Andrew J Oxenham
In modern Western music, melody is commonly conveyed by pitch changes in the highest-register voice, whereas meter or rhythm is often carried by instruments with lower pitches. An intriguing and recently suggested possibility is that the custom of assigning rhythmic functions to lower-pitch instruments may have emerged because of fundamental properties of the auditory system that result in superior time encoding for low pitches. Here we compare rhythm and synchrony perception between low- and high-frequency tones, using both behavioral and EEG techniques...
January 17, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28093579/progression-of-transsynaptic-retinal-degeneration-with-spectral-domain-optical-coherence-tomography
#5
Stephen G Schwartz, Armando Monroig, Harry W Flynn
PURPOSE: To illustrate the progression of retrograde transsynaptic retinal degeneration using spectral- domain optical coherence tomography (SD-OCT). OBSERVATIONS: A 60 year-old man with a stroke was followed over a 17-month period using SD-OCT of the macula, ganglion cell layer (GCC), and retinal nerve fiber layer. Transsynaptic retinal degeneration progressed over this time. CONCLUSIONS AND IMPORTANCE: Retrograde transsynaptic retinal degeneration may occur in patients with homonymous visual field loss caused by post-geniculate neurologic disease...
April 2017: American Journal of Ophthalmology Case Reports
https://www.readbyqxmd.com/read/28081533/eeg-monitoring-technique-influences-the-management-of-hypoxic-ischemic-seizures-in-neonates-undergoing-therapeutic-hypothermia
#6
Saber Jan, Frances J Northington, Charlamaine M Parkinson, Carl E Stafstrom
Electroencephalogram (EEG) monitoring techniques for neonatal hypoxia-ischemia (HI) are evolving over time, and the specific type of EEG utilized could influence seizure diagnosis and management. We examined whether the type of EEG performed affected seizure treatment decisions (e.g., the choice and number of antiseizure drugs [ASDs]) in therapeutic hypothermia-treated neonates with HI from 2007 to 2015 in the Johns Hopkins Hospital Neonatal Intensive Care Unit. During this period, 3 different EEG monitoring protocols were utilized: Period 1 (2007-2009), single, brief conventional EEG (1 h duration) at a variable time during therapeutic hypothermia treatment, i...
January 17, 2017: Developmental Neuroscience
https://www.readbyqxmd.com/read/28065378/difference-in-diaphragmatic-motion-during-tidal-breathing-in-a-standing-position-between-copd-patients-and-normal-subjects-time-resolved-quantitative-evaluation-using-dynamic-chest-radiography-with-flat-panel-detector-system-dynamic-x-ray-phrenicography
#7
Yoshitake Yamada, Masako Ueyama, Takehiko Abe, Tetsuro Araki, Takayuki Abe, Mizuki Nishino, Masahiro Jinzaki, Hiroto Hatabu, Shoji Kudoh
OBJECTIVES: To quantitatively compare diaphragmatic motion during tidal breathing in a standing position between chronic obstructive pulmonary disease (COPD) patients and normal subjects using dynamic chest radiography. MATERIALS AND METHODS: Thirty-nine COPD patients (35 males; age, 71.3±8.4years) and 47 normal subjects (non-smoker healthy volunteers) (20 males; age, 54.8±9.8years) underwent sequential chest radiographs during tidal breathing using dynamic chest radiography with a flat panel detector system...
February 2017: European Journal of Radiology
https://www.readbyqxmd.com/read/28050214/satisfaction-of-elderly-hearing-aid-users
#8
Lorena Kozlowski, Angela Ribas, Gleide Almeida, Idalina Luz
Introduction The impact of auditory sensory deprivation in the life of an individual is enormous because it not only affects one's ability to properly understand auditory information, but also the way people relate to their environment and their culture. The monitoring of adult and elderly subjects with hearing loss is intended to minimize the difficulties and handicaps that occur as a consequence of this pathology. Objective To evaluate the level of user satisfaction with hearing aids. Methods A clinical and experimental study involving 91 elderly hearing aid users...
January 2017: International Archives of Otorhinolaryngology
https://www.readbyqxmd.com/read/28046980/we-fg-206-05-new-arterial-spin-labeling-method-for-simultaneous-estimation-of-arterial-cerebral-blood-volume-cerebral-blood-flow-and-arterial-transit-time
#9
M Johnston, H Liu, C Whitlow, Y Jung
PURPOSE: To demonstrate the feasibility of a novel Arterial Spin Labeling (ASL) method for simultaneously measuring cerebral blood flow (CBF), arterial transit time (ATT), and arterial cerebral blood volume (aCBV) without the use of a contrast agent. METHODS: A series of multi-TI ASL images were acquired from one healthy subject on a 3T Siemens Skyra, with the following parameters: PCASL labeling with variable TI [300, 400, 500, 600, 700, 800, 900, 1000, 1500, 2000, 2500, 3000, 3500, 4000] ms, labeling bolus 1400 ms when TI allows, otherwise 100 ms less than TI, TR was minimized for each TI, two sinc shaped pre-saturation pulses were applied in the imaging plane immediately before 2D EPI acquisition...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28001270/speech-language-pathology-assessment-for-tracheal-decannulation-in-patients-suffering-from-traumatic-brain-injury
#10
Isabel de Lima Zanata, Rosane Sampaio Santos, Jair Mendes Marques, Gisela Carmona Hirata, Daiane Aparecida Dos Santos
Purpose: To describe the effect of Speech-Language Pathology (SLP) management on the tracheal decannulation process in patients with traumatic brain injury (TBI). Methods: Prospective controlled clinical study. Two groups of patients with TBI confirmed by computed axial tomography were included in the study group (G1) and control group (G2) composed of 30 individuals each, with 25 (83.3%) male and 5 (16.7%) female individuals in both groups. Patients' age ranged from 18 to 53 years old - mean age was 32 years...
November 2016: CoDAS
https://www.readbyqxmd.com/read/27956440/acute-coronary-syndromes
#11
Tushar Kotecha, Roby D Rakhit
In the UK, there are over 80,000 admissions annually with acute coronary syndromes (ACS). Management of ST-elevation myocardial infarction (STEMI) involves primary percutaneous coronary intervention (PCI), which is delivered via dedicated heart attack centres. Non-ST elevation-ACS (NSTE-ACS) accounts for two-thirds of ACS presentations, affecting an older cohort of patients - often with more complex comorbidities. Initial management is with anti-thrombotic therapy with a view to PCI within 24 hours for the most acute cases and within 72 hours for all others...
December 2016: Clinical Medicine: Journal of the Royal College of Physicians of London
https://www.readbyqxmd.com/read/27942774/mapping-and-expression-of-genes-associated-with-raspberry-fruit-ripening-and-softening
#12
Craig G Simpson, Danny W Cullen, Christine A Hackett, Kay Smith, Paul D Hallett, Jim McNicol, Mary Woodhead, Julie Graham
QTL mapping identifies a range of underlying and unrelated genes with apparent roles in raspberry fruit ripening and softening that show characteristic developing fruit expression profiles. Fruit softening is an important agronomical trait that involves a complex interaction of plant cell processes. We have used both qualitative and quantitative scoring of fruit firmness, length, mass, and resistance to applied force to identify QTL in a raspberry mapping population. QTLs were located primarily on linkage group (LG) 3 with other significant loci on LG 1 and LG 5 and showed mostly additive effects between the two parents...
December 9, 2016: TAG. Theoretical and Applied Genetics. Theoretische und Angewandte Genetik
https://www.readbyqxmd.com/read/27940870/midbrain-dopamine-neurons-control-judgment-of-time
#13
Sofia Soares, Bassam V Atallah, Joseph J Paton
Our sense of time is far from constant. For instance, time flies when we are having fun, and it slows to a trickle when we are bored. Midbrain dopamine neurons have been implicated in variable time estimation. However, a direct link between signals carried by dopamine neurons and temporal judgments is lacking. We measured and manipulated the activity of dopamine neurons as mice judged the duration of time intervals. We found that pharmacogenetic suppression of dopamine neurons decreased behavioral sensitivity to time and that dopamine neurons encoded information about trial-to-trial variability in time estimates...
December 9, 2016: Science
https://www.readbyqxmd.com/read/27930592/self-reported-psychological-development-in-cosmetic-breast-surgery-patients
#14
María Ángeles Pérez-San-Gregorio, Agustín Martín-Rodríguez, María Jesús Arias-Moreno, María Esther Rincón-Fernández, José Ignacio Ortega-Martínez
Cosmetic breast surgery is the only therapeutic alternative for psychological and physical complications associated with micromasty, breast ptosis, and macromasty. We analyzed the effects of 2 variables, time, and type of cosmetic breast surgery, on anxiety symptomatology and quality of life.Following a mixed 3 × 4 design, 3 groups of women with breast augmentation (n = 63), mastopexy (n = 42), and breast reduction (n = 30) were selected and evaluated using the State-Trait Anxiety Inventory and the 12-Item Short-Form Health Survey at 4 different times, the preoperative stage, and at 1, 6, and 12 months postoperative...
December 2016: Medicine (Baltimore)
https://www.readbyqxmd.com/read/27902891/computerized-agility-training-improves-change-of-direction-and-balance-performance-independently-of-footwear-in-young-adults
#15
Max R Paquette, Brian K Schilling, Joshua D Bravo, Shelby A Peel, Yuhua Li, Robert J Townsend
: Understanding the effects of training in different footwear on sporting performance would be useful to coaches and athletes. PURPOSE: This study compared the effects of computerized agility training using 3 types of footwear on change-of-direction and balance performance in young adults. METHOD: Thirty recreationally active young adults (Mage = 22.8 ± 3.1 years; Mheight = 1.71 ± 0.7 m; Mbodymass = 73.4 ± 10.3 kg) were randomly assigned to a 6-week computerized agility training intervention in 1 of 3 footwear groups (n = 10/group): barefoot, minimal footwear, or traditional shoes...
November 30, 2016: Research Quarterly for Exercise and Sport
https://www.readbyqxmd.com/read/27891774/does-chemical-preconditioning-contribute-to-the-effectiveness-of-scaling-and-root-planing-an-in-vitro-pilot-investigation
#16
M Becker, J Ciupka, T Pierchalla, K R Fischer, A Friedmann
OBJECTIVES: A solution based on hypochlorite and amino acids was introduced to improve cleaning efficacy on the root surfaces. The purpose of this in vitro pilot study was to evaluate the time reduction and number of strokes required to clean untreated root surfaces in vitro. METHODS: Sixty extracted human teeth displaying areas with subgingival calculus were assigned equally to one of three treatment groups (n = 20) according to the size of occupied areas, estimated by the number of pixels...
November 28, 2016: International Journal of Dental Hygiene
https://www.readbyqxmd.com/read/27885777/variable-time-normalization-analysis-general-graphical-elucidation-of-reaction-orders-from-concentration-profiles
#17
Jordi Burés
The recent technological evolution of reaction monitoring techniques has not been paralleled by the development of modern kinetic analyses. The analyses currently used disregard part of the data acquired, thus requiring an increased number of experiments to obtain sufficient kinetic information for a given chemical reaction. Herein, we present a simple graphical analysis method that takes advantage of the data-rich results provided by modern reaction monitoring tools. This analysis uses a variable normalization of the time scale to enable the visual comparison of entire concentration reaction profiles...
December 23, 2016: Angewandte Chemie
https://www.readbyqxmd.com/read/27870105/evaluating-the-effects-of-discriminability-on-behavioral-persistence-during-and-following-time-based-reinforcement
#18
Valdeep Saini, Wayne W Fisher
With four children with autism we evaluated a refinement to time-based reinforcement designed to reduce response persistence when we simultaneously introduced time-based reinforcement and extinction. We further evaluated whether this refinement mitigated response recurrence when all reinforcer deliveries ceased during an extinction-only disruptor phase. The refinement involved increasing the saliency of the contingency change from contingent reinforcement (during baseline) to time-based reinforcement by delivering different colored reinforcers during time-based reinforcement...
November 2016: Journal of the Experimental Analysis of Behavior
https://www.readbyqxmd.com/read/27869491/penile-self-injection-with-foreign-materials
#19
U Ahmed, A Freeman, A Kirkham, D J Ralph, S Minhas, A Muneer
Injection of the subcutaneous tissues of the penis for enlargement of penile girth has been practised for many years by laypeople and medical practitioners alike. However, with recognition of the complications, the practice has died out. We report a series of five patients who presented having injected foreign materials into the subcutaneous tissues of their penises, including paraffin and mineral oils. Our patients had a variable time course of presentation ranging from 1 day following injection to over 26 years...
November 21, 2016: Annals of the Royal College of Surgeons of England
https://www.readbyqxmd.com/read/27859618/in-vivo-measurement-of-a-new-source-of-contrast-the-dipolar-relaxation-time-t1d-using-a-modified-inhomogeneous-magnetization-transfer-ihmt-sequence
#20
Gopal Varma, Olivier M Girard, Valentin H Prevost, Aaron K Grant, Guillaume Duhamel, David C Alsop
PURPOSE: This paper describes a technique that can be used in vivo to measure the dipolar relaxation time, T1D , of macromolecular protons contributing to magnetization transfer (MT) in tissues and to produce quantitative T1D maps. THEORY AND METHODS: The technique builds upon the inhomogeneous MT (ihMT) technique that is particularly sensitive to tissue components with long T1D . A standard ihMT experiment was altered to introduce a variable time for switching between positive and negative offset frequencies for RF saturation...
November 17, 2016: Magnetic Resonance in Medicine: Official Journal of the Society of Magnetic Resonance in Medicine
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