keyword
MENU ▼
Read by QxMD icon Read
search

Tilt test

keyword
https://www.readbyqxmd.com/read/28821444/circumferential-fusion-a-comparative-analysis-between-anterior-lumbar-interbody-fusion-with-posterior-pedicle-screw-fixation-and-transforaminal-lumbar-interbody-fusion-for-l5-s1-isthmic-spondylolisthesis
#1
Erik Y Tye, Joseph E Tanenbaum, Andrea S Alonso, Roy Xiao, Michael P Steinmetz, Thomas E Mroz, Jason W Savage
BACKGROUND CONTEXT: Transforaminal lumbar interbody fusion (TLIF) or anterior lumbar interbody fusion with percutaneous pedicle screws (ALIFPS) offer significantly higher radiographic fusion rates than other fusion techniques for L5-S1 isthmic spondylolisthesis (IS). As it stands, there is a relative paucity of comparative data of the two techniques. PURPOSE: To define the clinical, radiographic, and financial differences between TLIF and ALIFPS for L5-S1 IS. STUDY DESIGN/SETTING: A retrospective cohort study conducted at a single-tertiary care center...
August 15, 2017: Spine Journal: Official Journal of the North American Spine Society
https://www.readbyqxmd.com/read/28818141/autonomic-cardiovascular-responses-to-orthostatic-stress-after-a-short-artificial-gravity-exposure
#2
Qingguang Zhang, Joyce M Evans, Michael B Stenger, Fritz B Moore, Charles F Knapp
BACKGROUND: Intermittent artificial gravity (AG) training over days and weeks has been shown to improve the human orthostatic tolerance limit (OTL) and improve cardiovascular regulation in response to orthostatic stress. Effects of a single AG exposure are currently unknown. METHODS: We tested cardiovascular responses to orthostatic stress in 16 hypovolemic subjects (9 men and 7 women), once following a single, short (∼90 min) bout of AG and once following a similar period of head-down bed rest (HDBR)...
September 1, 2017: Aerospace Medicine and Human Performance
https://www.readbyqxmd.com/read/28818140/dynamic-cerebral-autoregulation-during-the-combination-of-mild-hypercapnia-and-cephalad-fluid-shift
#3
Takuya Kurazumi, Yojiro Ogawa, Ryo Yanagida, Hiroshi Morisaki, Ken-Ichi Iwasaki
BACKGROUND: Mild hypercapnia combined with a cephalad fluid shift [e.g., that occurring during spaceflight or laparoscopic surgery with head-down tilt (HDT)] might affect cerebral autoregulation. However, no reports have described the effects of the combination on dynamic cerebral autoregulation. Therefore, we tested the hypothesis that the combination of mild hypercapnia and a cephalad fluid shift would attenuate dynamic cerebral autoregulation. METHODS: There were 15 healthy male volunteers who were exposed to 4 10-min protocols in which they received air in the supine position (Placebo/Supine), 3% carbon dioxide (CO2) in the supine position (CO2/Supine), air with -10° HDT (Placebo/HDT) and 3% CO2 with -10° HDT (CO2/HDT)...
September 1, 2017: Aerospace Medicine and Human Performance
https://www.readbyqxmd.com/read/28814635/perception-of-the-dynamic-visual-vertical-during-sinusoidal-linear-motion
#4
Antonella Pomante, Luc P J Selen, W Pieter Medendorp
The vestibular system provides information for spatial orientation. However, this information is ambiguous: because the otoliths sense the gravito-inertial force, they cannot distinguish gravitational and inertial components. As a consequence, prolonged linear acceleration of the head can be interpreted as tilt, referred to as the somatogravic effect. Previous modeling work suggests that the brain disambiguates the otolith signal according to the rules of Bayesian inference, combining noisy canal cues with the a priori assumption that prolonged linear accelerations are unlikely...
August 16, 2017: Journal of Neurophysiology
https://www.readbyqxmd.com/read/28801199/repositioning-the-scapula-with-taping-following-distal-radius-fracture-kinematic-analysis-using-3-dimensional-motion-system
#5
Elif Turgut, Cigdem Ayhan, Gul Baltaci
STUDY DESIGN: Cross-sectional and controlled laboratory study using pretest-posttest design. INTRODUCTION: Patients with distal radius fracture (DRfx) report proximal segment problems. Taping is commonly recommended because it provides improved posture and function. PURPOSE OF THE STUDY: This study aimed to investigate the 3-dimensional scapular kinematics and the effect of taping on the kinematics in participants with DRfx. METHODS: Twenty participants with a unilateral history of DRfx and 20 healthy controls participated...
August 8, 2017: Journal of Hand Therapy: Official Journal of the American Society of Hand Therapists
https://www.readbyqxmd.com/read/28796086/sensitivity-and-specificity-of-clinical-and-laboratory-otolith-function-tests
#6
Lokesh Kumar, Alok Thakar, Bhaskar Thakur, Kapil Sikka
OBJECTIVE: To evaluate clinic based and laboratory tests of otolith function for their sensitivity and specificity in demarcating unilateral compensated complete vestibular deficit from normal. STUDY DESIGN: Prospective cross-sectional study. SETTING: Tertiary care hospital vestibular physiology laboratory. SUBJECTS: Control group-30 healthy adults, 20-45 years age; Case group-15 subjects post vestibular shwannoma excision or post-labyrinthectomy with compensated unilateral complete audio-vestibular loss...
August 8, 2017: Otology & Neurotology
https://www.readbyqxmd.com/read/28795253/autonomic-responses-to-head-up-tilt-test-in-children-with-autism-spectrum-disorders
#7
Véronique-Aurélie Bricout, Marion Pace, Léa Dumortier, Anne Favre-Juvin, Michel Guinot
Autism Spectrum Disorders (ASD) is a group of neurodevelopmental disorders often manifested by social and behavioral deficiencies. Autonomic dysfunction is frequently reported in the autistic population but the mechanisms remain largely unknown. We aimed to characterize the cardiac autonomic profile of children with autism during a head-up tilt test. Thirty-nine male children were recruited: 19 controls (9.9 ± 1.6 years) and 20 children with ASD without intellectual disability (10.7 ± 1.2 years). Each child underwent a head-up tilt test on a motorized tilt table...
August 9, 2017: Journal of Abnormal Child Psychology
https://www.readbyqxmd.com/read/28790966/randomized-controlled-study-of-a-remote-flipped-classroom-neuro-otology-curriculum
#8
Frederick Robert Carrick, Mahera Abdulrahman, Ahmed Hankir, Maksim Zayaruzny, Kinda Najem, Palita Lungchukiet, Roger A Edwards
CONTEXT: Medical Education can be delivered in the traditional classroom or via novel technology including an online classroom. OBJECTIVE: To test the hypothesis that learning in an online classroom would result in similar outcomes as learning in the traditional classroom when using a flipped classroom pedagogy. DESIGN: Randomized controlled trial. A total of 274 subjects enrolled in a Neuro-otology training program for non-Neuro-otologists of 25 h held over a 3-day period...
2017: Frontiers in Neurology
https://www.readbyqxmd.com/read/28783558/rod-and-frame-test-and-posture-under-optokinetic-stimulation-used-to-explore-two-complementary-aspects-of-the-visual-influence-in-postural-control-after-stroke
#9
Sophie Tasseel-Ponche, Hélène Le Liepvre, Florence Colle, Cédric Andriantsifanetra, Pierre-Paul Vidal, Isabelle Véronique Bonan, Alain-Pierre Yelnik
BACKGROUND: Balance rehabilitation should consider individual comportments according to visual input (VI). Indeed, visual dependence (VD), defined as the predominance given to the VI whatever the circumstances, frequent after stroke it could disturb balance. Because the term VD is a bit restrictive and cannot be deduced from clinical tests, the term visual sensitivity (VS) is preferred here. HYPOTHESIS: VI could have different influence depending on the task for a given individual...
July 22, 2017: Gait & Posture
https://www.readbyqxmd.com/read/28777570/in-situ-scrutiny-of-the-relationship-between-polymorphic-phases-and-properties-of-self-assembled-monolayers-of-a-biphenyl-based-thiol
#10
Markos Paradinas, Carmen Munuera, Manfred Buck, Carmen Ocal
Two polymorphic phases of ω-(4'-methylbiphenyl-4-yl) butane-1-thiol (BP4) molecules formed on Au(111) were investigated by multi-dimensional atomic force microscopy, combining conductivity measurements, electrostatic characterization, friction force mapping and normal force spectroscopy. Based on the same molecular structure but differing in molecular order, packing density and molecular tilt, the two phases serve as a test bench to establish the structure-property relationships in self-assembled monolayers (SAMs)...
August 4, 2017: Journal of Physical Chemistry. B
https://www.readbyqxmd.com/read/28777285/3d-modeling-of-lower-extremities-with-biplanar-radiographs-reliability-of-measures-on-subsequent-examinations
#11
David E Westberry, Ashley M Carpenter
BACKGROUND: Biplanar radiography with 3-dimensional (3D) modeling (EOS) provides a comprehensive assessment of lower limb alignment in an upright weight-bearing position with less radiation than conventional radiography. A study was performed to assess the consistency and reliability of 2 lower extremity 3D biplanar radiograph models created at least 1 year apart in a pediatric population. METHODS: All patients who had 2 lower extremity radiographic evaluations with EOS performed at visits a minimum of 1 year apart were reviewed...
August 2, 2017: Journal of Pediatric Orthopedics
https://www.readbyqxmd.com/read/28770033/epicardial-fat-thickness-is-correlated-with-vagal-hyperactivity-in-patients-with-neurally-mediated-syncope
#12
Kyoung Im Cho, Young Soo Lee, Byong Kyu Kim, Bong Joon Kim, Kee Sik Kim
BACKGROUND: Epicardial fat tissue has unique endocrine and paracrine functions that affect the cardiac autonomic system. The head-up tilt test (HUTT) is a simple non-invasive measurement that assesses autonomic nervous system dysfunction. We investigated the association between epicardial fat thickness (EFT) and autonomic neural tone, such as vagal tone. METHODS: A total of 797 consecutive patients (mean age 46.5 years, male: 45.7%) who underwent HUTT and echocardiography between March 2006 and June 2015 were enrolled...
June 2017: Journal of Cardiovascular Ultrasound
https://www.readbyqxmd.com/read/28765629/subthalamic-nucleus-stimulation-and-levodopa-modulate-cardiovascular-autonomic-function-in-parkinson-s-disease
#13
Kai Li, Rocco Haase, Heinz Rüdiger, Manja Reimann, Heinz Reichmann, Martin Wolz, Tjalf Ziemssen
We aimed to explore the effects of bilateral subthalamic nucleus stimulation and levodopa on cardiovascular autonomic function in Parkinson's disease. Twenty-six Parkinson's disease patients with bilateral subthalamic nucleus stimulation in a stable state were tested under stimulation off and dopaminergic medication off (OFF-OFF), stimulation on and dopaminergic medication off (ON-OFF), and stimulation on and medication (levodopa) on (ON-ON) conditions by recording continuously blood pressure, ECG, and respiration at rest, during metronomic deep breathing, and head-up tilt test...
August 1, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28759983/validation-of-ct-image-based-software-for-three-dimensional-measurement-of-acetabular-coverage-profile
#14
Marcus P Wenzl, Markus Heller, Viktor Janz, Carsten Perka, Georgi I Wassilew
BACKGROUND: Plain radiography, 2-dimensional (2D) magnetic resonance imaging (MRI), and computed tomography (CT) do not precisely display morphology and acetabular coverage in developmental dysplasia of the hip or pincer-type femoroacetabular impingement. Pelvic position and pelvic tilt affect assessment of the acetabular parameters, leading to misinterpretation. OBJECTIVE: We tested a 3-dimensional (3D) CT evaluation script to calculate the crossover sign (COS), acetabular coverage and morphology...
July 21, 2017: Technology and Health Care: Official Journal of the European Society for Engineering and Medicine
https://www.readbyqxmd.com/read/28758823/physical-inactivity-and-platelet-function-in-humans-and-brown-bears-a-comparative-study
#15
K Arinell, S Blanc, K G Welinder, O-G Støen, A L Evans, O Fröbert
Physical inactivity increases the risk of thromboembolism. However, good standardized human models on inactivity are in short supply and experimental models are few. Our objective was to investigate how standardized bed rest affects platelet aggregation in humans and to investigate if aggregation is altered in a translational model system - the hibernating brown bear (Ursus arctos). We collected blood from (1) healthy male volunteers participating in a 21-day bed rest study in head-down tilt position (-6°) 24 h a day; (2) free-ranging brown bears captured during winter hibernation and again during active state in summer...
July 31, 2017: Platelets
https://www.readbyqxmd.com/read/28757666/generating-an-image-that-affords-slant-perception-from-stereo-without-pictorial-cues
#16
J Galeotti, K Macdonald, J Wang, S Horvath, A Zhang, R Klatzky
This paper describes an algorithm for generating a planar image that when tilted provides stereo cues to slant, without contamination from pictorial gradients. As the stimuli derived from this image are ultimately intended for use in studies of slant perception under magnification, a further requirement is that the generated image be suitable for high-definition printing or display on a monitor. A first stage generates an image consisting of overlapping edges with sufficient density that when zoomed, edges that nearly span the original scale are replaced with newly emergent content that leaves the visible edge statistics unchanged...
January 2017: Displays
https://www.readbyqxmd.com/read/28750994/inter-rater-and-intra-rater-reliability-of-a-movement-control-test-in-shoulder
#17
S Rajasekar, Rakshith K Bangera, Padmanaban Sekaran
BACKGROUND: Movement faults are commonly observed in patients with musculoskeletal pain. The Kinetic Medial Rotation Test (KMRT) is a movement control test used to identify movement faults of the scapula and gleno-humeral joints during arm movement. Objective tests such as the KMRT need to be reliable and valid for the results to be applied across different clinical settings and patient populations. The primary objective of the present study was to determine the intra-rater and inter-rater reliability of KMRT in subjects with and without shoulder pain...
July 2017: Journal of Bodywork and Movement Therapies
https://www.readbyqxmd.com/read/28743638/efficient-3d-ctf-correction-for-cryo-electron-tomography-using-novactf-improves-subtomogram-averaging-resolution-to-3-4-%C3%A3
#18
Beata Turoňová, Florian K M Schur, William Wan, John A G Briggs
Cryo-electron tomography (cryo-ET) allows cellular ultrastructures and macromolecular complexes to be imaged in three-dimensions in their native environments. Cryo-electron tomograms are reconstructed from projection images taken at defined tilt-angles. In order to recover high-resolution information from cryo-electron tomograms, it is necessary to measure and correct for the contrast transfer function (CTF) of the microscope. Most commonly, this is performed using protocols that approximate the sample as a two-dimensional (2D) plane...
July 22, 2017: Journal of Structural Biology
https://www.readbyqxmd.com/read/28720881/patients-with-orthostatic-intolerance-relationship-to-autonomic-function-tests-results-and-reproducibility-of-symptoms-on-tilt
#19
Hyung Lee, Phillip A Low, Hyun Ah Kim
This study was designed to investigate the frequency and pattern of orthostatic symptoms during head-up tilt (HUT) in patients with orthostatic intolerance during daily life, and to identify the relationship between the orthostatic symptoms during HUT and autonomic parameters. We prospectively collected autonomic data from 464 patients with orthostatic symptoms. Adrenergic and cardiovagal function tests including HUT were performed. Based on HUT results, we divided patients into orthostatic hypotension (OH), postural tachycardia syndrome (POTS), or normal HUT groups...
July 18, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28717991/prolonged-bed-rest-impairs-rapid-cpi-17-phosphorylation-and-contraction-in-rat-mesenteric-resistance-arteries-to-cause-orthostatic-hypotension
#20
Toshio Kitazawa, Kazuyo Kitazawa
Prolonged bed rest (PBR) causes orthostatic hypotension (OH). Rapid constriction of splanchnic resistance arteries in response to a sudden increase in sympathetic tone contributes to the recovery of orthostatic arterial pressure upon standing. However, the molecular mechanism of PBR-induced dysfunction in arterial constriction is not fully understood. Previously, we showed that CPI-17, a regulatory protein for myosin phosphatase, mediates α1A-adrenergic receptor-induced rapid contraction of small mesenteric arteries...
July 17, 2017: Pflügers Archiv: European Journal of Physiology
keyword
keyword
18953
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"