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https://www.readbyqxmd.com/read/29348989/signs-and-symptoms-of-acoustic-neuroma-at-initial-presentation-an-exploratory-analysis
#1
Robert W Foley, Shahram Shirazi, Robert M Maweni, Kay Walsh, Rory McConn Walsh, Mohsen Javadpour, Daniel Rawluk
Introduction The objective of this study was to describe the most common clinical features associated with an acoustic neuroma diagnosis and to identify those features associated with larger tumour size at initial diagnosis. Methods The clinical information of 945 consecutive patients diagnosed with acoustic neuroma at a single centre between 1992 and 2015 was analysed. Clinical features were examined and the relationship between these features and tumour size (>2.5 cm) was analysed using descriptive statistics and logistic regression analysis...
November 15, 2017: Curēus
https://www.readbyqxmd.com/read/29347868/differential-white-matter-regional-alterations-in-motor-subtypes-of-early-drug-naive-parkinson-s-disease-patients
#2
Ming-Ching Wen, Hannah S E Heng, Zhonghao Lu, Zheyu Xu, Ling Ling Chan, Eng King Tan, Louis C S Tan
BACKGROUND: Parkinson's disease (PD) can be classified into tremor dominant (TD) and postural instability and gait difficulty (PIGD) subtypes with TD considered as the benign subtype. The neural alterations of the 2 subtypes in the early stages before administration of medications remain elusive. OBJECTIVE: This study assessed the subtype-related white matter (WM) microstructural features in newly diagnosed and drug-naive PD patients from the Parkinson's Progression Markers Initiative (PPMI)...
January 1, 2018: Neurorehabilitation and Neural Repair
https://www.readbyqxmd.com/read/29339984/functional-vs-traditional-analysis-in-biomechanical-gait-data-an-alternative-statistical-approach
#3
Jihong Park, Matthew K Seeley, Devin Francom, C Shane Reese, J Ty Hopkins
In human motion studies, discrete points such as peak or average kinematic values are commonly selected to test hypotheses. The purpose of this study was to describe a functional data analysis and describe the advantages of using functional data analyses when compared with a traditional analysis of variance (ANOVA) approach. Nineteen healthy participants (age: 22 ± 2 yrs, body height: 1.7 ± 0.1 m, body mass: 73 ± 16 kg) walked under two different conditions: control and pain+effusion. Pain+effusion was induced by injection of sterile saline into the joint capsule and hypertonic saline into the infrapatellar fat pad...
December 2017: Journal of Human Kinetics
https://www.readbyqxmd.com/read/29339773/postural-adaptations-to-unilateral-knee-joint-hypomobility-induced-by-orthosis-wear-during-gait-initiation
#4
A Delafontaine, P Fourcade, J L Honeine, S Ditcharles, E Yiou
Balance control and whole-body progression during gait initiation (GI) involve knee-joint mobility. Single knee-joint hypomobility often occurs with aging, orthopedics or neurological conditions. The goal of the present study was to investigate the capacity of the CNS to adapt GI organization to single knee-joint hypomobility induced by the wear of an orthosis. Twenty-seven healthy adults performed a GI series on a force-plate in the following conditions: without orthosis ("control"), with knee orthosis over the swing leg ("orth-swing") and with the orthosis over the contralateral stance leg ("orth-stance")...
January 16, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29332755/investigating-the-anticipatory-postural-adjustment-phase-of-gait-initiation-in-different-directions-in-chronic-ankle-instability-patients
#5
Zahra Ebrahimabadi, Sedigheh Sadat Naimi, Abbas Rahimi, Heydar Sadeghi, Seyed Majid Hosseini, Alireza Akbarzadeh Baghban, Syed Asadullah Arslan
OBJECTIVE: The main objective of the present study was to analyze how supra spinal motor control mechanisms are altered in different directions during anticipatory postural phase of gait initiation in chronic ankle instability patients. It seems that supra spinal pathways modulate anticipatory postural adjustment phase of gait initiation. Yet, there is a dearth of research on the effect of chronic ankle instability on the anticipatory postural adjustment phase of gait initiation in different directions...
January 2018: Journal of Bodywork and Movement Therapies
https://www.readbyqxmd.com/read/29327655/accuracy-between-optical-and-inertial-motion-capture-systems-for-assessing-trunk-speed-during-preferred-gait-and-transition-periods
#6
Martin Kokholm Fleron, Niels Christian Hauerbach Ubbesen, Francesco Battistella, David Leandro Dejtiar, Anderson Souza Oliveira
Motion capture through inertial sensors is becoming popular, but its accuracy to describe kinematics during changes in walking speed is unknown. The aim of this study was to determine the accuracy of trunk speed extracted using an inertial motion system compared to a gold standard optical motion system, during steady walking and stationary periods. Eleven participants walked on pre-established paths marked on the floor. Between each lap, a 1-second stationary transition period at the initial position was included prior to the next lap...
January 12, 2018: Sports Biomechanics
https://www.readbyqxmd.com/read/29324700/predicting-lameness-in-sheep-activity-using-tri-axial-acceleration-signals
#7
Jamie Barwick, David Lamb, Robin Dobos, Derek Schneider, Mitchell Welch, Mark Trotter
Lameness is a clinical symptom associated with a number of sheep diseases around the world, having adverse effects on weight gain, fertility, and lamb birth weight, and increasing the risk of secondary diseases. Current methods to identify lame animals rely on labour intensive visual inspection. The aim of this current study was to determine the ability of a collar, leg, and ear attached tri-axial accelerometer to discriminate between sound and lame gait movement in sheep. Data were separated into 10 s mutually exclusive behaviour epochs and subjected to Quadratic Discriminant Analysis (QDA)...
January 11, 2018: Animals: An Open Access Journal From MDPI
https://www.readbyqxmd.com/read/29324457/successful-first-gait-of-a-child-with-hip-disarticulation-prosthesis-a-case-report
#8
Hitomi Hara, Teruya Kawamoto, Naomasa Fukase, Etsuko Katayama, Toshiyuki Takemori, Shuichi Fujiwara, Yoshitada Sakai, Kotaro Nishida, Ryosuke Kuroda, Toshihiro Akisue
An infant boy underwent hip disarticulation for infantile fibrosarcoma immediately after birth. His rehabilitation began when he was 4 months old and involved training with his left (residual) leg. He could stand with support at 12 months. His initial prosthesis fitting was performed at the age of 13 months. He could stand and walk with support at 15 months of age and could walk with no additional support and go up and down stairs at 2 years. A single-axis prosthetic knee joint was introduced at the age of 2 years 3 months...
January 11, 2018: American Journal of Physical Medicine & Rehabilitation
https://www.readbyqxmd.com/read/29322877/topographical-variation-of-human-femoral-articular-cartilage-thickness-t1rho-and-t2-relaxation-times-is-related-to-local-loading-during-walking
#9
Sam Van Rossom, Mariska Wesseling, Dieter Van Assche, Ilse Jonkers
Objective Early detection of degenerative changes in the cartilage matrix composition is essential for evaluating early interventions that slow down osteoarthritis (OA) initiation. T1rho and T2 relaxation times were found to be effective for detecting early changes in proteoglycan and collagen content. To use these magnetic resonance imaging (MRI) methods, it is important to document the topographical variation in cartilage thickness, T1rho and T2 relaxation times in a healthy population. As OA is partially mechanically driven, the relation between these MRI-based parameters and localized mechanical loading during walking was investigated...
January 1, 2018: Cartilage
https://www.readbyqxmd.com/read/29311681/creating-flexible-motor-memories-in-human-walking
#10
Kristan A Leech, Ryan T Roemmich, Amy J Bastian
The human nervous system has the ability to save newly learned movements (i.e. re-learn faster after initial learning) and generalize learning to new conditions. In the context of walking, we rely on savings and generalization of newly learned walking patterns to navigate changing environments and make progressive improvements with gait rehabilitation. Here, we used a split-belt treadmill to study how different perturbation parameters can influence savings and generalization of learning during walking. In Experiment 1, we investigated the effect of split perturbation size on savings of a newly learned walking pattern...
January 8, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29310988/an-updated-diagnostic-approach-to-subtype-definition-of-vascular-parkinsonism-recommendations-from-an-expert-working-group
#11
REVIEW
Ivan Rektor, Nicolaas I Bohnen, Amos D Korczyn, Viktoria Gryb, Hrishikesh Kumar, Milica G Kramberger, Frank-Erik de Leeuw, Zvezdan Pirtošek, Irena Rektorová, Ilana Schlesinger, Jaroslaw Slawek, Peter Valkovič, Branislav Veselý
This expert working group report proposes an updated approach to subtype definition of vascular parkinsonism (VaP) based on a review of the existing literature. The persistent lack of consensus on clear terminology and inconsistent conceptual definition of VaP formed the impetus for the current expert recommendation report. The updated diagnostic approach intends to provide a comprehensive tool for clinical practice. The preamble for this initiative is that VaP can be diagnosed in individual patients with possible prognostic and therapeutic consequences and therefore should be recognized as a clinical entity...
December 29, 2017: Parkinsonism & related Disorders
https://www.readbyqxmd.com/read/29300697/robust-neuro-optimal-control-of-underactuated-snake-robots-with-experience-replay
#12
Zhengcai Cao, Qing Xiao, Ran Huang, Mengchu Zhou
In this paper, the problem of path following for underactuated snake robots is investigated by using approximate dynamic programming and neural networks (NNs). The lateral undulatory gait of a snake robot is stabilized in a virtual holonomic constraint manifold through a partial feedback linearizing control law. Based on a dynamic compensator and Line-of-Sight guidance law, the path-following problem is transformed to a regulation problem of a nonlinear system with uncertainties. Subsequently, it is solved by an infinite horizon optimal control scheme using a single critic NN...
January 2018: IEEE Transactions on Neural Networks and Learning Systems
https://www.readbyqxmd.com/read/29299643/body-foot-geometries-as-revealed-by-perturbed-obstacle-position-with-different-time-constraints
#13
Louis-Philippe Dugas, Laurent J Bouyer, Bradford J McFadyen
This study examined the geometrical relationships between the feet, pelvis and an environmental obstruction when crossing an obstacle with unexpected changes to its position. Nine healthy young adults stepped over an obstacle 19 cm high with their right leg leading. The obstacle could be static or advanced at either lead (early detection) or trail (late detection) foot contact prior to clearance to force an adaptive reorganization of body-foot geometry and foot proximity to the obstacle. Stride length, minimum foot clearance over the obstacle, and foot-obstacle horizontal proximity before and after clearance were measured along with the relative position of the pelvis to each foot at eight points (four for each foot) during approach and clearance: heel contacts before and after crossing the obstacle, maximum foot heights and foot clearances...
January 4, 2018: Experimental Brain Research. Experimentelle Hirnforschung. Expérimentation Cérébrale
https://www.readbyqxmd.com/read/29298691/volition-adaptive-control-for-gait-training-using-wearable-exoskeleton-preliminary-tests-with-incomplete-spinal-cord-injury-individuals
#14
Vijaykumar Rajasekaran, Eduardo López-Larraz, Fernando Trincado-Alonso, Joan Aranda, Luis Montesano, Antonio J Del-Ama, Jose L Pons
BACKGROUND: Gait training for individuals with neurological disorders is challenging in providing the suitable assistance and more adaptive behaviour towards user needs. The user specific adaptation can be defined based on the user interaction with the orthosis and by monitoring the user intentions. In this paper, an adaptive control model, commanded by the user intention, is evaluated using a lower limb exoskeleton with incomplete spinal cord injury individuals (SCI). METHODS: A user intention based adaptive control model has been developed and evaluated with 4 incomplete SCI individuals across 3 sessions of training per individual...
January 3, 2018: Journal of Neuroengineering and Rehabilitation
https://www.readbyqxmd.com/read/29276623/feline-vertebral-angiomatosis-two-cases
#15
Massimo Frizzi, Nicola Ottolini, Claudia Spigolon, Giovanna Bertolini
Case series summary: Two cats aged between 1 and 2 years were presented for paraparesis, general discomfort, back pain and urinary retention. Extradural spinal cord compression at the level of T4 and T8 was evident on CT examination and on MRI. Hemilaminectomy and partial corpectomy were performed to achieve spinal cord decompression. Histopathology of the abnormal bone tissue was suggestive of vertebral angiomatosis. After initially worsening, both cats recovered their normal gait and functional urination...
July 2017: JFMS Open Reports
https://www.readbyqxmd.com/read/29250758/refractory-facial-paralysis-a-case-report
#16
Yu-Wei Hsu, Jiunn-Tay Lee, Yi-Shu Liao, Shin Nieh, Chun-An Cheng, Chia-Kuang Tsai
PURPOSE: To present a case of salivary gland malignancy initially mimicking Bell's palsy. CASE REPORT: A 75-year-old woman with hypertension visited our neurological outpatient department,complaining of persistent right facial paralysis for more than a year after oral glucocorticoid therapy with recent development of vertigo and unsteady gait. She was previously diagnosed as having Bell's palsy and was prescribed oral glucocorticoid. However, her right facial muscles were still completely paralyzed, with no signs of improvement...
June 15, 2017: Acta Neurologica Taiwanica
https://www.readbyqxmd.com/read/29250496/primary-total-hip-arthroplasty-using-summit%C3%A2-stems-in-korean-minimum-four-year-follow-up
#17
Jae Sik Yoon, Joon Sun Kang, Kyoung Ho Moon
Purpose: The aim of this study was to assess the mid-term results of primary cementless total hip arthroplasty (THA) using Summit® stems. Materials and Methods: One hundred twenty-eight arthroplasties in 121 patients who were performed THA from December 2004 to March 2013, were reviewed retrospectively a minimum of 4 years follow-up (mean age, 60.3 years; mean postoperative follow up period, 86.3 months). For a clinical evaluation, the Harris hip score (HHS) was used to assess outcome...
December 2017: Hip & Pelvis
https://www.readbyqxmd.com/read/29249765/acute-cerebellar-ataxia-induced-by-nivolumab
#18
Reina Kawamura, Eiichiro Nagata, Masako Mukai, Yoichi Ohnuki, Tomohiko Matsuzaki, Kana Ohiwa, Tomoki Nakagawa, Mitsutomo Kohno, Ryota Masuda, Masayuki Iwazaki, Shunya Takizawa
A 54-year-old woman with adenocarcinoma of the lung and lymph node metastasis experienced nystagmus and cerebellar ataxia 2 weeks after initiating nivolumab therapy. An evaluation for several autoimmune-related antibodies and paraneoplastic syndrome yielded negative results. We eventually diagnosed the patient with nivolumab-induced acute cerebellar ataxia, after excluding other potential conditions. Her ataxic gait and nystagmus resolved shortly after intravenous steroid pulse therapy followed by the administration of decreasing doses of oral steroids...
2017: Internal Medicine
https://www.readbyqxmd.com/read/29248191/manipulating-post-stroke-gait-exploiting-aberrant-kinematics
#19
Megan E Reissman, Keith E Gordon, Yasin Y Dhaher
Post-stroke individuals often exhibit abnormal kinematics, including increased pelvic obliquity and hip abduction coupled with reduced knee flexion. Prior examinations suggest these behaviors are expressions of abnormal cross-planar coupling of muscle activity. However, few studies have detailed the impact of gait-retraining paradigms on three-dimensional joint kinematics. In this study, a cross-tilt walking surface was examined as a novel gait-retraining construct. We hypothesized that relative to baseline walking kinematics, exposure to cross-tilt would generate significant changes in subsequent flat-walking joint kinematics during affected limb swing...
December 6, 2017: Journal of Biomechanics
https://www.readbyqxmd.com/read/29242800/subtotal-calcanectomy-for-the-treatment-of-chronic-ulcer-associated-with-osteomyelitis-a-case-report
#20
Thiago Batista Faleiro, Alexandre Vasconcelos de Meirelles, Roberto Guimarães Rezende, Herberth Rodrigues Ferreira, Gildásio de Cerqueira Daltro, Renata da Silva Schulz
Introduction: Subtotal calcanectomy is a therapeutic option for the treatment of chronic ulcer associated with calcaneal osteomyelitis. Closure of the surgical wound can be difficult due to the lack of local cutaneous coverage. We present the first case of subtotal calcanectomy in which the ankle was positioned in plantar flexion allowing the primary closure of the surgical wound without the need for flap. Case Report: We present a case of 62-year-old female patient with a foot ulcer associated with osteomyelitis...
September 2017: Journal of Orthopaedic Case Reports
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