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https://www.readbyqxmd.com/read/28931998/trunk-function-in-hemiplegic-wheelchair-users-when-using-wheelchair-cushions
#1
Kyohei Kawada
[Purpose] The purpose of this study was to investigate adapting wheelchair cushions to hemiplegic individuals based on trunk function and a single-leg driving motion. [Subjects and Methods] Subjects were 18 hemiplegic adults who were able to use and sit up in a wheelchair. Subjects were grouped into Able and Unable groups according to the Functional Assessment for Control of the Trunk (FACT). The posterior pelvic tilt angle and the driving speed and muscle activity at the long head of the biceps femoris at the start of wheelchair use were measured for three wheelchair cushion conditions, and FACT factors and cushion factors were then analyzed...
September 2017: Journal of Physical Therapy Science
https://www.readbyqxmd.com/read/28927455/eight-orthopedic-surgeons-achieved-moderate-to-excellent-reliability-measuring-the-preoperative-posterior-tilt-angle-in-50-garden-i-and-garden-ii-femoral-neck-fractures
#2
Filip C Dolatowski, Sigurd Erik Hoelsbrekken
BACKGROUND: Studies of elderly patients with Garden-I and Garden-II femoral neck fractures (FNFs) suggest that a preoperative posterior tilt of the femoral head of at least 20° increases the risk of fixation failure. A recently published treatment algorithm recommended hemiarthroplasty over internal fixation for elderly patients with Garden-I and Garden-II FNFs and a preoperative posterior tilt of at least 20°. However, the reliability of the method used to measure the posterior tilt has not been assessed according to recommended standards for reliability trials...
September 19, 2017: Journal of Orthopaedic Surgery and Research
https://www.readbyqxmd.com/read/28919878/postural-control-in-bilateral-vestibular-failure-its-relation-to-visual-proprioceptive-vestibular-and-cognitive-input
#3
Andreas Sprenger, Jann F Wojak, Nico M Jandl, Christoph Helmchen
Patients with bilateral vestibular failure (BVF) suffer from postural and gait unsteadiness with an increased risk of falls. The aim of this study was to elucidate the differential role of otolith, semicircular canal (SSC), visual, proprioceptive, and cognitive influences on the postural stability of BVF patients. Center-of-pressure displacements were recorded by posturography under six conditions: target visibility; tonic head positions in the pitch plane; horizontal head shaking; sensory deprivation; dual task; and tandem stance...
2017: Frontiers in Neurology
https://www.readbyqxmd.com/read/28917397/evaluation-of-postoperative-toric-intraocular-lens-alignment-with-anterior-segment-optical-coherence-tomography
#4
Andrea Lucisano, Marco Ferrise, Marco Balestrieri, Massimo Busin, Vincenzo Scorcia
We describe the use of a simple tool to evaluate the postoperative alignment of toric intraocular lenses (IOLs). The entire anterior segment is scanned using anterior segment optical coherence tomography and analyzed with an internal dedicated tool. A topographic map is displayed along with an anterior segment image, including a linear axis marker centered on the corneal apex. The marker can be rotated until it is aligned with the line connecting the IOL marking dots, precisely reproducing the IOL astigmatic axis, which is measured in angle degrees...
August 2017: Journal of Cataract and Refractive Surgery
https://www.readbyqxmd.com/read/28914956/ischemic-femoral-head-osteonecrosis-in-a-piglet-model-causes-three-dimensional-decrease-in-acetabular-coverage
#5
Vidyadhar V Upasani, Megan E Jeffords, Christine L Farnsworth, David Padilla, Nick Lopreiato, Olumide O Aruwajoye, Harry K W Kim
Legg-Calve-Perthes disease (LCPD) is a childhood form of ischemic osteonecrosis marked by development of severe femoral head deformity and premature osteoarthritis. The pathogenesis of femoral head deformity has been studied extensively using a piglet model of ischemic osteonecrosis, however accompanying acetabular changes have not been investigated. The purpose of this study was to determine if acetabular changes accompany femoral head deformity in a well-established piglet model of LCPD and to define the acetabular changes using 3 dimensional computed tomography (3-D CT) and modeling...
September 15, 2017: Journal of Orthopaedic Research: Official Publication of the Orthopaedic Research Society
https://www.readbyqxmd.com/read/28913515/paradoxical-head-tilt-in-unilateral-traumatic-superior-oblique-palsy
#6
Mohammad Reza Akbari, Reza Bayat, Arash Mirmohammadsadeghi, Reza Mirshahi
PURPOSE: We report a patient with abnormal head posture following ocular blunt trauma. METHODS: This is report of a case that despite findings compatible with diagnosis of left superior oblique (SO) palsy, the patient acquired an ipsilateral (left) head tilt. The interesting observation in our patient was reduction of left hypertropia and consequent less diplopia with ipsilateral head tilt. RESULTS: After blunt trauma, our patient adopted paradoxical left head tilt and consequently less diplopia despite acquired left SO palsy...
September 2017: Journal of Current Ophthalmology
https://www.readbyqxmd.com/read/28906446/a-novel-low-power-consumption-all-fiber-optic-anemometer-with-simple-system-design
#7
Yang Zhang, Fang Wang, Zhihui Duan, Zexu Liu, Zigeng Liu, Zhenlin Wu, Yiying Gu, Changsen Sun, Wei Peng
A compact and low-power consuming fiber-optic anemometer based on single-walled carbon nanotubes (SWCNTs) coated tilted fiber Bragg grating (TFBG) is presented. TFBG as a near infrared in-fiber sensing element is able to excite a number of cladding modes and radiation modes in the fiber and effectively couple light in the core to interact with the fiber surrounding mediums. It is an ideal in-fiber device used in a fiber hot-wire anemometer (HWA) as both coupling and sensing elements to simplify the sensing head structure...
September 14, 2017: Sensors
https://www.readbyqxmd.com/read/28904457/delayed-orthostatic-hypotension-a-pilot-study-from-india
#8
Arun Grace Roy, Siby Gopinath, Suresh Kumar, Sudheeran Kannoth, Anand Kumar
INTRODUCTION: Orthostatic hypotension is defined as a sustained decrease in systolic blood pressure of 20 mm Hg or a decrease in diastolic blood pressure of 10 mm Hg within three minutes of standing compared with blood pressure from the sitting or supine position or by head-up tilt-table testing (1). When sustained blood pressure (BP) drop is after three minutes of upright posture it is called delayed orthostatic hypotension (delayed OH) (2). AIM OF THE STUDY: To detect the incidence of delayed orthostatic hypotension in patients referred to our autonomic lab...
July 2017: Annals of Indian Academy of Neurology
https://www.readbyqxmd.com/read/28894832/visual-effects-on-the-subjective-visual-vertical-and-subjective-postural-head-vertical-during-static-roll-tilt
#9
Atsushi Tamura, Yoshiro Wada, Akihiro Kurita, Takeshi Matsunobu, Takuo Inui, Akihiro Shiotani
OBJECTIVES: Tilt perception is part of the perception of spatial orientation. It is determined not only by the allocentric gravity axis, but also by a second allocentric axis induced by visual information as well as by the egocentric body (head) axis induced by somatosensory information. The aim of this study was to quantify roll-tilt perception using the subjective visual vertical (SVV) and the newly developed subjective postural head vertical (SPHV) and to investigate the visual effects on both during static roll-tilt...
June 2017: Laryngoscope Investigative Otolaryngology
https://www.readbyqxmd.com/read/28887501/voluntary-liquorice-ingestion-increases-blood-pressure-via-increased-volume-load-elevated-peripheral-arterial-resistance-and-decreased-aortic-compliance
#10
Elina J Hautaniemi, Anna M Tahvanainen, Jenni K Koskela, Antti J Tikkakoski, Mika Kähönen, Marko Uitto, Kalle Sipilä, Onni Niemelä, Jukka Mustonen, Ilkka H Pörsti
We investigated the haemodynamic effects of two-week liquorice exposure (glycyrrhizin dose 290-370 mg/day) in 22 healthy volunteers during orthostatic challenge. Haemodynamics were recorded during passive 10-minute head-up tilt using radial pulse wave analysis, whole-body impedance cardiography, and spectral analysis of heart rate variability. Thirty age-matched healthy subjects served as controls. Liquorice ingestion elevated radial systolic (p < 0.001) and diastolic (p = 0.018) blood pressure and systemic vascular resistance (p = 0...
September 8, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28883717/assessing-balance-through-the-use-of-a-low-cost-head-mounted-display-in-older-adults-a-pilot-study
#11
Santiago J Saldana, Anthony P Marsh, W Jack Rejeski, Jack K Haberl, Peggy Wu, Scott Rosenthal, Edward H Ip
INTRODUCTION: As the population ages, the prevention of falls is an increasingly important public health problem. Balance assessment forms an important component of fall-prevention programs for older adults. The recent development of cost-effective and highly responsive virtual reality (VR) systems means new methods of balance assessment are feasible in a clinical setting. This proof-of-concept study made use of the submillimeter tracking built into modern VR head-mounted displays (VRHMDs) to assess balance through the use of visual-vestibular conflict...
2017: Clinical Interventions in Aging
https://www.readbyqxmd.com/read/28874974/evaluation-of-sagittal-spine-pelvis-lower-limb-alignment-in-elderly-women-with-pelvic-retroversion-while-standing-and-walking-using-a-three-dimensional-musculoskeletal-model
#12
Ken Sasaki, Michio Hongo, Naohisa Miyakoshi, Toshiki Matsunaga, Shin Yamada, Hiroaki Kijima, Yoichi Shimada
STUDY DESIGN: In vivo biomechanical study using a three-dimensional (3D) musculoskeletal model for elderly individuals with or without pelvic retroversion. PURPOSE: To evaluate the effect of pelvic retroversion on the sagittal alignment of the spine, pelvis, and lower limb in elderly females while standing and walking. OVERVIEW OF LITERATURE: Patients with hip-spine syndrome have concurrent hip-joint and spine diseases. However, the dynamic sagittal alignment between the hip joint and spine has rarely been investigated...
August 2017: Asian Spine Journal
https://www.readbyqxmd.com/read/28871556/lessons-from-a-tarantula-new-insights-into-muscle-thick-filament-and-myosin-interacting-heads-motif-structure-and-function
#13
REVIEW
Lorenzo Alamo, Natalia Koubassova, Antonio Pinto, Richard Gillilan, Andrey Tsaturyan, Raúl Padrón
The tarantula skeletal muscle X-ray diffraction pattern suggested that the myosin heads were helically arranged on the thick filaments. Electron microscopy (EM) of negatively stained relaxed tarantula thick filaments revealed four helices of heads allowing a helical 3D reconstruction. Due to its low resolution (5.0 nm), the unambiguous interpretation of densities of both heads was not possible. A resolution increase up to 2.5 nm, achieved by cryo-EM of frozen-hydrated relaxed thick filaments and an iterative helical real space reconstruction, allowed the resolving of both heads...
September 4, 2017: Biophysical Reviews
https://www.readbyqxmd.com/read/28862474/tympanic-membrane-temperature-decreases-during-head-up-tilt-relation-to-frontal-lobe-oxygenation-and-middle-cerebral-artery-mean-blood-flow-velocity
#14
David Lorr, Anton Lund, Mats Fredrikson, Niels H Secher
INTRODUCTION: Changes in blood flow influence temperature of surrounding tissues. Since the internal carotid artery (ICA) and internal jugular vein (IJV) neighbor the tympanic membrane, changes in their blood flow most likely determine changes in tympanic membrane temperature (TMT). We sought to evaluate the relationship between changes during a head-up tilt (HUT) induced reduction in cerebral blood flow (CBF) and TMT. METHODS: Ten male subjects (age 19-28 years) underwent 50° HUT until presyncope...
September 1, 2017: Scandinavian Journal of Clinical and Laboratory Investigation
https://www.readbyqxmd.com/read/28860415/t2-relaxation-time-increases-in-lumbar-intervertebral-discs-after-21d-head-down-tilt-bed-rest
#15
T Koy, B Ganse, J Zange, J Rittweger, R Pohle-Fröhlich, P Fings-Meuthen, B Johannes, D Felsenberg, P Eysel, P M Bansmann, D L Belavý
OBJECTIVES: Spaceflight back pain and intervertebral disc (IVD) herniations cause problems in astronauts. Purpose of this study was to assess changes in T2-relaxation-time through MRI measurements before and after head-down tilt bed-rest, a spaceflight analog. METHODS: 8 men participated in the bed-rest study. Subjects remained in 6° head down tilt bed-rest in two campaigns of 21 days, and received a nutritional intervention (potassium bicarbonate 90 mmol/d) in a cross-over design...
September 1, 2017: Journal of Musculoskeletal & Neuronal Interactions
https://www.readbyqxmd.com/read/28859846/the-influence-of-the-hips-position-on-measurements-of-posterior-tilt-in-a-valgus-impacted-femoral-neck-fracture
#16
Sigurd Erik Hoelsbrekken, Filip C Dolatowski
INTRODUCTION: Lateral radiographs are important for the evaluation of Garden I and II femoral neck fractures. These fractures appear undisplaced in the anteroposterior view, but posterior tilt of the femoral head may still be present in the lateral view. The influence of posterior tilt is, however, debated, which could be caused by the use of non-standardized cross-table radiographs in the conflicting reports. The aim of this bone-model study was therefore to evaluate the influence of the hips position on measurements of posterior tilt...
August 26, 2017: Injury
https://www.readbyqxmd.com/read/28845325/ocular-causes-of-abnormal-head-position-strabismus-clinic-data
#17
Kadriye Erkan Turan, Hande Taylan Şekeroğlu, İrem Koç, Esra Vural, Jale Karakaya, Emin Cumhur Şener, Ali Şefik Sanaç
OBJECTIVES: To determine the most common ocular causes and types of abnormal head position (AHP) and describe their clinical features. MATERIALS AND METHODS: Patients with AHP who had been followed in the strabismus unit were retrospectively reviewed. Demographic features and orthoptic characteristics were recorded. RESULTS: A total of 163 patients including 61 women (37.4%) and 102 men (62.6%), with a mean age of 19.9±18.3 were recruited...
August 2017: Turkish Journal of Ophthalmology
https://www.readbyqxmd.com/read/28844105/the-floccular-syndrome-dynamic-changes-in-eye-movements-and-vestibulo-ocular-reflex-in-isolated-infarction-of-the-cerebellar-flocculus
#18
Dario Andres Yacovino, Manuel Perez Akly, Leonel Luis, David S Zee
The cerebellar flocculus is a critical structure involved in the control of eye movements. Both static and dynamic abnormalities of the vestibulo-ocular reflex (VOR) have been described in animals with experimental lesions of the flocculus/paraflocculus complex. In humans, lesions restricted to the flocculus are rare so they can become an exceptional model to contrast with the clinical features in experimental animals or in patients with more generalized cerebellar diseases. Here, we examined a 67-year-old patient with an acute vestibular syndrome due to an isolated infarct of the right flocculus...
August 26, 2017: Cerebellum
https://www.readbyqxmd.com/read/28841851/combined-brown-syndrome-and-superior-oblique-palsy-without-a-trochlear-nerve-case-report
#19
Hee Kyung Yang, Jae Hyoung Kim, Ji-Soo Kim, Jeong-Min Hwang
BACKGROUND: Congenital Brown syndrome is characterized by limited elevation particularly during adduction. The pathogenesis of congenital Brown syndrome is still controversial. CASE PRESENTATION: A 6-year-old boy had been tilting his head to the left since infancy. He showed right hypertropia (RHT) of 2 prism diopters (Δ) in the primary position. He showed RHT 6Δ in right gaze, RHT 2Δ in left gaze, RHT 12Δ in right head tilt, and orthotropia in left head tilt...
August 25, 2017: BMC Ophthalmology
https://www.readbyqxmd.com/read/28839482/comparison-of-mesiodistal-root-angulation-measured-from-conventional-and-cbct-derived-panoramic-radiographs-in-orthodontic-patients
#20
Ibrahim Nasseh, Douglas Jensen, Marcel Noujeim
INTRODUCTION: Use of cone beam computed tomography (CBCT) in orthodontics is increasing; however, some patients started treatment with conventional images. The objective of this study is to manipulate CBCT panoramic reconstruction to make it comparable to conventional panoramic image and to compare mesiodistal root angulations on both images. MATERIALS AND METHODS: Concurrent conventional panoramics and CBCT volumes were obtained from 40 subjects. CBCT volumes were manipulated to generate pan-like images that mimic the occlusal plane angle of the corresponding panoramic, allowing comparison of mesiodistal root angulations and determination of the head-tilt required to produce the reconstruction...
2017: Open Dentistry Journal
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