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https://www.readbyqxmd.com/read/28643157/effect-of-variance-ratio-on-anova-robustness-might-1-5-be-the-limit
#1
María J Blanca, Rafael Alarcón, Jaume Arnau, Roser Bono, Rebecca Bendayan
Inconsistencies in the research findings on F-test robustness to variance heterogeneity could be related to the lack of a standard criterion to assess robustness or to the different measures used to quantify heterogeneity. In the present paper we use Monte Carlo simulation to systematically examine the Type I error rate of F-test under heterogeneity. One-way, balanced, and unbalanced designs with monotonic patterns of variance were considered. Variance ratio (VR) was used as a measure of heterogeneity (1.5, 1...
June 22, 2017: Behavior Research Methods
https://www.readbyqxmd.com/read/28639474/custom-rapid-prototype-thumb-prosthesis-for-partial-hand-amputation-a-case-report
#2
Ashley Quinn Swartz, Kristi Turner, Laura Miller, Todd Kuiken
BACKGROUND: Due to advancements in three-dimensional printing, custom-made prostheses are becoming more viable options for persons with difficult cases of prosthetic management. The purpose of this article was to develop a custom voluntary-closing, body-powered thumb mechanism for a partial-hand amputee who had amputations of the index finger and thumb on the left, non-dominant hand. Case description and methods: The prosthesis model was manufactured using rapid prototype technology and was developed to provide greater force and functionality, and to decrease overall size compared to traditional hand prostheses...
June 1, 2017: Prosthetics and Orthotics International
https://www.readbyqxmd.com/read/28638996/smooth-at-one-end-and-rough-at-the-other-influence-of-object-texture-on-grasping-behaviour
#3
Catharina Glowania, L C J van Dam, E Brenner, M A Plaisier
When picking up objects using a pinch grip, there are usually numerous places at which one could place the thumb and index finger. Yet, people seem to consistently place them at or close to the centre of mass (COM), presumably to minimize torque and therefore the required grip force. People also prefer to grasp objects by parallel surfaces and ones with higher friction coefficients (rough surfaces), to prevent the object from slipping when they lift it. Here, we examine the trade-off between friction and COM...
June 21, 2017: Experimental Brain Research. Experimentelle Hirnforschung. Expérimentation Cérébrale
https://www.readbyqxmd.com/read/28636299/-sprain-of-the-thumb-metacarpal-phalangeal-with-lesion-of-the-ulnar-collateral-ligament
#4
Thibault Poujade, Grégoire Chick
The sprain of the thumb metacarpal-phalangeal joint must be treated in an adapted way in order to avoid chronic laxity. The comparative and bilateral clinical exam is the main element that will allow to detect laxity. In the case of non laxity, a conservative treatment with a splint makes sense. In the case of laxity with Stener effect, a surgical procedure is recommended in order to reintegrate the collateral ligament. In the case of laxity without Stener effect, the choice of treatment is contentious. A US or MRI would be useful if the Stener effect could be underlying...
May 17, 2017: Revue Médicale Suisse
https://www.readbyqxmd.com/read/28630840/suspension-arthroplasty-combined-with-ligament-reconstruction-of-the-thumb-carpometacarpal-joint-to-salvage-two-failed-arthroplasties-a-case-report
#5
Ryosuke Kakinoki, Kazuhiko Hashimoto, Hiroki Tanaka, Masao Akagi
INTRODUCTION: Thumb basal joint arthroplasty with removal of the entire trapezium is often followed by proximal subsidence and impingement of the thumb metacarpal to the scaphoid, which is a common cause of post-operative thumb pain. Treatment of this impingement is a challenge among surgeons. We performed suspension arthroplasty combined with intercarpal ligament reconstruction using a strip of the extensor carpi radialis longus (ECRL) tendon on a patient suffering from pain caused by this type of the impingement and obtained a successful outcome...
January 2017: Journal of Orthopaedic Case Reports
https://www.readbyqxmd.com/read/28627199/hand-span-influences-optimal-grip-span-in-adolescents-with-down-syndrome
#6
José Antonio Casajús, Germán Vicente-Rodríguez, Alejandro González-Agüero, Ángel Matute-Llorente
INTRODUCTION: The hand grip strength test provides useful and reliable information about overall health. Different studies have investigated the optimal grip span for determining maximal hand grip strength in different populations such as adults, adolescents and children without disabilities. OBJECTIVE: To ascertain whether there is an optimal grip span for determining maximal hand grip strength in adolescents with Down syndrome (DS). METHODS: Twenty-seven right-handed youths with DS (seven females) aged 15...
June 5, 2017: Nutrición Hospitalaria: Organo Oficial de la Sociedad Española de Nutrición Parenteral y Enteral
https://www.readbyqxmd.com/read/28626591/a-case-of-trapezium-avascular-necrosis-treated-conservatively
#7
Evangelos Petsatodis, Konstantinos Ditsios, Panagiotis Konstantinou, Iosafat Pinto, Lazaros Kostretzis, Ioannis Theodoroudis, Mayia Pilavaki
INTRODUCTION: Avascular necrosis (AVN) of the bones of the wrist most commonly involves the lunate followed by the proximal pole of the scaphoid and the capitate. Trapezium avascular necrosis is extremely rare with only two cases reported in the literature, both of which were treated surgically. In this article, we report a unique case of trapezium avascular necrosis treated conservatively. CASE PRESENTATION: A 38-year-old man complaining of a 4-month history of mild pain on the base of his right thumb...
2017: Case Reports in Orthopedics
https://www.readbyqxmd.com/read/28625869/an-historical-perspective-on-the-pioneering-experiments-of-john-saunders
#8
REVIEW
Cheryll Tickle
John Saunders was a highly skilled embryologist who pioneered the study of limb development. His studies on chick embryos provided the fundamental framework for understanding how vertebrate limbs develop. This framework inspired generations of scientists and formed the bridge from experimental embryology to molecular mechanisms. Saunders investigated how feathers become organized into tracts in the skin of the chick wing and also identified regions of programmed cell death. He discovered that a region of thickened ectoderm that rims the chick wing bud - the apical ectodermal ridge - is required for outgrowth and the laying down of structures along the proximo-distal axis (long axis) of the wing, identified the zone of polarizing activity (ZPA; polarizing region) that controls development across the anteroposterior axis ("thumb to little finger "axis) and contributed to uncovering the importance of the ectoderm in development of structures along the dorso-ventral axis ( "back of hand to palm" axis)...
June 15, 2017: Developmental Biology
https://www.readbyqxmd.com/read/28621755/biophysical-mode-of-action-and-selectivity-analysis-of-allosteric-inhibitors-of-hepatitis-c-virus-hcv-polymerase
#9
Eldar Abdurakhmanov, Sara Øie Solbak, U Helena Danielson
Allosteric inhibitors of hepatitis C virus (HCV) non-structural protein 5B (NS5B) polymerase are effective for treatment of genotype 1, although their mode of action and potential to inhibit other isolates and genotypes are not well established. We have used biophysical techniques and a novel biosensor-based real-time polymerase assay to investigate the mode-of-action and selectivity of four inhibitors against enzyme from genotypes 1b (BK and Con1) and 3a. Two thumb inhibitors (lomibuvir and filibuvir) interacted with all three NS5B variants, although the affinities for the 3a enzyme were low...
June 16, 2017: Viruses
https://www.readbyqxmd.com/read/28619300/clinical-effect-of-traditional-chinese-spinal-orthopedic-manipulation-in-treatment-of-functional-abdominal-pain-syndrome
#10
Liyang Xing, Liuxin Qu, Hong Chen, Song Gao
OBJECTIVE: To evaluate the clinical effect of Traditional Chinese Spinal Orthopedic Manipulation (TCSOM) in treating Functional Abdominal Pain Syndrome (FAPS) in comparison with Pinaverium Bromide (Dicetel, PBD), and to assess a possible cause for FAPS. METHODS: 60 cases of FAPS patients were randomly assigned to the TCSOM group and PBD group according to the random number table method. The TCSOM group was treated with thumb pressing manipulation, every other day in the first week, and once every three days in the second week, for 5 times treatments...
June 2017: Complementary Therapies in Medicine
https://www.readbyqxmd.com/read/28616779/-arthrodesis-of-the-distal-interphalangeal-joint-using-the-headless-compression-screw
#11
REVIEW
C K Spies, B Hohendorff, S Löw, L P Müller, J Oppermann, P Hahn, F Unglaub
OBJECTIVE: Arthrodesis of the distal interphalangeal joint of the fingers and interphalangeal joint of the thumb in order to gain reliable stability and function. INDICATIONS: Primary and secondary osteoarthritis, rheumatoid arthritis, defect lesions, septic joint destruction, posttraumatic joint deviation, fatal joint instability, fatal tendon lesions. CONTRAINDICATIONS: Persistent infections (empyema, osteomyelitis, phlegmon), deficient soft tissue mantle, bone/screw mismatch...
June 14, 2017: Operative Orthopädie und Traumatologie
https://www.readbyqxmd.com/read/28616034/acupuncture-with-reinforcing-and-reducing-twirling-manipulation-inhibits-hippocampal-neuronal-apoptosis-in-spontaneously-hypertensive-rats
#12
Juan Lu, Yan Guo, Chang-Qing Guo, Xue-Min Shi, Ning-Yu Du, Rui-Li Zhao, Wen-Ping Du, Jing-Rong Liang, Shi-Peng Zhu, Huan Chen
To observe the effects of different acupuncture manipulations on blood pressure and target organ damage in spontaneously hypertensive rats (SHRs), this study used the reinforcing twirling method (1.5-2-mm depth; rotating needle clockwise for 360° and then counter clockwise for 360°, with the thumb moving heavily forward and gently backward, 60 times per minute for 1 minute, and retaining needle for 9 minutes), the reducing twirling method (1.5-2-mm depth; rotating needle counter clockwise for 360° and then clockwise for 360°, with the thumb moving heavily backward and gently forward, 60 times per minute for 1 minute, and retaining needle for 9 minutes), and the needle retaining method (1...
May 2017: Neural Regeneration Research
https://www.readbyqxmd.com/read/28609554/digit-preserving-surgery-of-subungual-melanoma-a-case-series-using-vacuum-assisted-closure-and-full-thickness-skin-grafting
#13
D Crisan, J Gülke, C Janetzko, S Kastler, N Treiber, K Scharffetter-Kochanek, L A Schneider
Acrolentiginous melanoma (ALM) is the second most common nail organ tumour and frequently, affects the thumb or the great toe.(1,2) Digit amputation is still the gold standard for many surgeons;(3) it does, however, not protect against local recurrence. An alternative represents complete tumour resection with distal phalanx preservation, which has proven valuable, especially for well demarcated thinner tumours.(4,5) This article is protected by copyright. All rights reserved.
June 13, 2017: Journal of the European Academy of Dermatology and Venereology: JEADV
https://www.readbyqxmd.com/read/28609222/thoracic-and-respirable-aerosol-fractions-of-spray-products-containing-non-volatile-compounds
#14
Katharina Schwarz, Wolfgang Koch
A versatile and simple mass balance method for the measurement of the release fraction of thoracic and respirable particles of non-volatile compounds of spray products is presented. The release fractions are defined as the ratio between the mass of suspended non-volatile particulate matter in the thoracic, respectively, respirable particle size range and the total mass of non-volatile material released with the spray action. For its determination, a spray bolus of short duration and of defined mass is sprayed into a well stirred control chamber...
June 13, 2017: Journal of Occupational and Environmental Hygiene
https://www.readbyqxmd.com/read/28607641/lessons-learned-from-the-study-of-masturbation-and-its-comorbidity-with-psychiatric-disorders-in-children-the-first-analytic-study
#15
Ashraf Tashakori, Atefeh Safavi, Sorour Neamatpour
BACKGROUND: The main source of information about children's masturbation is more on the basis of case reports. Due to the lack of consistent and accurate information. OBJECTIVE: This study aimed to determine prevalence and underlying factors of masturbation and its comorbidity with psychiatric disorders in children. METHODS: In this descriptive-analytical study, among the children referred to the Pediatrics Clinic of Psychiatric Ward, Golestan Hospital, Ahvaz, Southwest Iran, 98 children were selected by convenience sampling in 2014...
April 2017: Electronic Physician
https://www.readbyqxmd.com/read/28606622/reconstruction-of-combined-thumb-amputation-at-the-metacarpal-base-level-and-index-amputation-at-the-metacarpal-level-with-pollicization-and-bilateral-double-toe-composite-transfer
#16
Zhenglin Chi, Da Jiang Song, Lin Tian, Fu Hua Hu, Xiao Fang Shen, Harvey Chim
BACKGROUND: This study aimed to describe the technique and report our experience with the reconstruction of combined proximal thumb amputations at the metacarpal base level and index finger amputation at the metacarpal level with pollicization and bilateral double toe composite transfer. METHODS: The technique consists of pollicization of the remnant index ray. Then a contralateral composite medial great toe pulp and vascularized second toe proximal interphalangeal joint flap are harvested to reconstruct the metacarpophalangeal joint of the thumb...
May 20, 2017: Journal of Plastic, Reconstructive & Aesthetic Surgery: JPRAS
https://www.readbyqxmd.com/read/28603568/current-concepts-in-radial-club-hand
#17
Takehiko Takagi, Atsuhito Seki, Shinichiro Takayama, Masahiko Watanabe
Radial club hand is a complex congenital abnormality of the radial or pre-axial border of the upper extremity. It has a wide range of phenotypes from hypoplasia of the thumb to complete absence of the radius and the first ray. Centralization with tendon transfer is a popular method for maintaining the correct position of radial club hand. On the other hand, various corrections were devised, e.g. radialization after distraction to emphasize the fact that the head of the ulna is positioned under the radial carpal bones and is no longer placed in a slot in the center of the carpus, microvascular epiphysis transfer, gradual correction using Ilizarov method, for Bayne Type III or Type IV...
2017: Open Orthopaedics Journal
https://www.readbyqxmd.com/read/28602132/treatment-of-congenital-clasped-thumb-in-arthrogryposis
#18
H Abdel-Ghani, M Mahmoud, A Shaheen, M Abdel-Wahed
We report the result of treatment of 69 complex clasped thumbs in 39 patients with distal arthrogryposis. The mean age at surgery was 30 months. Surgical reconstruction included skin augmentation of the first web using modified dorsal rotation advancement flap (Abdel-Ghani flap), a la Carte release of tight structures of the first web, and chondrodesis of the thumb metacarpophalangeal joint. The mean follow-up was 4 years. We prefer chondrodesis because of the presence of global instability, abnormal joint structure, abnormal articular surfaces, and inefficient muscles for transfer...
June 1, 2017: Journal of Hand Surgery, European Volume
https://www.readbyqxmd.com/read/28600064/pfeiffer-syndrome-with-fgfr2-c342r-mutation-presenting-extreme-proptosis-craniosynostosis-hearing-loss-ventriculomegaly-broad-great-toes-and-thumbs-maxillary-hypoplasia-and-laryngomalacia
#19
Chih-Ping Chen, Shuan-Pei Lin, Yu-Peng Liu, Schu-Rern Chern, Shin-Wen Chen, Shih-Ting Lai, Wayseen Wang
No abstract text is available yet for this article.
June 2017: Taiwanese Journal of Obstetrics & Gynecology
https://www.readbyqxmd.com/read/28599013/thumb-rest-position-and-its-role-in-neuromuscular-control-of-the-clarinet-task
#20
Kathryn E Young, Sara A Winges
Musicians spend long hours of practice and performance to master their instrument. Clarinet players support their roughly 2-lb instrument on the right-hand thumb, which results in cumulative static loading of the arm. This posture in turn can cause discomfort and, in some cases, evolve into debilitating overuse injuries and pain throughout the right upper limb. Altering the thumb-rest position has been proposed as a way to alleviate this discomfort, although no quantitative research has been conducted on this issue...
June 2017: Medical Problems of Performing Artists
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