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https://www.readbyqxmd.com/read/29148138/artificial-walking-technologies-to-improve-gait-in-cerebral-palsy-multichannel-neuromuscular-stimulation
#1
Jessica Rose, Katelyn Cahill-Rowley, Erin E Butler
Cerebral palsy (CP) is the most common childhood motor disability and often results in debilitating walking abnormalities, such as flexed-knee and stiff-knee gait. Current medical and surgical treatments are only partially effective in improving gait abnormalities and may cause significant muscle weakness. However, emerging artificial walking technologies, such as step-initiated, multichannel neuromuscular electrical stimulation (NMES), can substantially improve gait patterns and promote muscle strength in children with spastic CP...
November 2017: Artificial Organs
https://www.readbyqxmd.com/read/29134061/the-effect-of-leg-to-body-ratio-on-male-attractiveness-depends-on-the-ecological-validity-of-the-figures
#2
Thomas M M Versluys, William J Skylark
Leg-to-body ratio (LBR) predicts evolutionary fitness, and is therefore expected to influence bodily attractiveness. Previous investigations of LBR attractiveness have used a wide variety of stimuli, including line drawings, silhouettes, and computer-generated images based on anthropometric data. In two studies, community samples of heterosexual women from the USA rated the attractiveness of male figures presented as silhouettes and as detailed computer-generated images with three different skin tones (white, black, and an artificial grey)...
October 2017: Royal Society Open Science
https://www.readbyqxmd.com/read/29131276/the-expression-of-mmp-7-in-serum-and-aneurysm-tissues-of-patients-with-abdominal-aortic-aneurysm-associated-with-hypertension-and-the-clinical-efficacy-of-endovascular-exclusion
#3
W-H Zhang, C-H Qiao, X Zhang, H Luo, X-K Sun
OBJECTIVE: To investigate the expression of matrix metalloproteinase-7 (MMP-7) in abdominal aortic aneurysm (AAA) with hypertension, and the clinical efficacy of endovascular exclusion. PATIENTS AND METHODS: Seventy-two cases of AAA with hypertension were retrospectively analyzed. Patients were divided into the observation group (34 cases) and control group (38 cases). The control group was treated by AAA incision with artificial vascular replacement, while the observation group was treated by endovascular graft exclusion...
October 2017: European Review for Medical and Pharmacological Sciences
https://www.readbyqxmd.com/read/29115820/continuously-producible-ultrasensitive-wearable-strain-sensor-assembled-with-three-dimensional-interpenetrating-agnw-poe-nanofibrous-composite-yarn
#4
Weibing Zhong, Cui Liu, Chenxue Xiang, Yuxia Jin, Mufang Li, Ke Liu, Qiongzhen Liu, Yuedan Wang, Gang Sun, Dong Wang
Fiber shaped strain sensors with great flexibility and knittability have been tremendously concerned due to the wide applications in health manager devices, especially in human motion detection and physicalogical signal monitoring. Herein, a novel fiber shaped strain sensor has been designed and prepared by interpenetrating AgNWs into POE nanofibrous yarn. The easy-to-obtain structure and simple roll-to-roll process make the continuous large-scale production of nanofibrous composite yarn possible. The continuous and alternating stretching and releasing reversibly change the contact probability between AgNWs in this interpenetrating networks, leading to the variations of electrical resistance of the sensor...
November 8, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29103810/subjective-behavioral-and-physiological-responses-to-the-rubber-hand-illusion-do-not-vary-with-age-in-the-adult-phase
#5
Priscila Palomo, Adrián Borrego, Ausiàs Cebolla, Roberto Llorens, Marcelo Demarzo, Rosa M Baños
The Rubber Hand Illusion (RHI) is a perceptual illusion that enables integration of artificial limbs into the body representation through combined multisensory integration. Most previous studies investigating the RHI have involved young healthy adults within a very narrow age range (typically 20-30 years old). The purpose of this paper was to determine the influence of age on the RHI. The RHI was performed on 93 healthy adults classified into three groups of age (20-35 years old, N = 41; 36-60 years old, N = 28; and 61-80 years old, N = 24), and its effects were measured with subjective (Embodiment of Rubber Hand Questionnaire), behavioral (proprioceptive drift), and physiological (changes in skin temperature and conductance) measures...
November 3, 2017: Consciousness and Cognition
https://www.readbyqxmd.com/read/29068628/upper-limb-rehabilitation-robot-powered-by-pams-cooperates-with-fes-arrays-to-realize-reach-to-grasp-trainings
#6
Xikai Tu, Hualin Han, Jian Huang, Jian Li, Chen Su, Xiaobo Jiang, Jiping He
The reach-to-grasp activities play an important role in our daily lives. The developed RUPERT for stroke patients with high stiffness in arm flexor muscles is a low-cost lightweight portable exoskeleton rehabilitation robot whose joints are unidirectionally actuated by pneumatic artificial muscles (PAMs). In order to expand the useful range of RUPERT especially for patients with flaccid paralysis, functional electrical stimulation (FES) is taken to activate paralyzed arm muscles. As both the exoskeleton robot driven by PAMs and the neuromuscular skeletal system under FES possess the highly nonlinear and time-varying characteristics, iterative learning control (ILC) is studied and is taken to control this newly designed hybrid rehabilitation system for reaching trainings...
2017: Journal of Healthcare Engineering
https://www.readbyqxmd.com/read/29065566/upper-limb-rehabilitation-robot-powered-by-pams-cooperates-with-fes-arrays-to-realize-reach-to-grasp-trainings
#7
Xikai Tu, Hualin Han, Jian Huang, Jian Li, Chen Su, Xiaobo Jiang, Jiping He
The reach-to-grasp activities play an important role in our daily lives. The developed RUPERT for stroke patients with high stiffness in arm flexor muscles is a low-cost lightweight portable exoskeleton rehabilitation robot whose joints are unidirectionally actuated by pneumatic artificial muscles (PAMs). In order to expand the useful range of RUPERT especially for patients with flaccid paralysis, functional electrical stimulation (FES) is taken to activate paralyzed arm muscles. As both the exoskeleton robot driven by PAMs and the neuromuscular skeletal system under FES possess the highly nonlinear and time-varying characteristics, iterative learning control (ILC) is studied and is taken to control this newly designed hybrid rehabilitation system for reaching trainings...
2017: Journal of Healthcare Engineering
https://www.readbyqxmd.com/read/29062251/a-congenital-cranial-dysinnervation-disorder-m%C3%A3-bius-syndrome
#8
Hatice Mutlu Albayrak, Nuriye Tarakçı, Hüseyin Altunhan, Rahmi Örs, Hüseyin Çaksen
Möbius' syndrome, also known as Möbius' sequence, is a nonprogressive cranial dysinnervation disorder characterized by congenital facial and abducens nerve paralysis. Here, we report a 5-day-old girl who was conceived after in vitro fertilization with poor suck and facial paralysis. She had bilaterally ptosis and lateral gaze limitation, left-sided deviation of the tongue, dysmorphic face, hypoplastic fingers and finger nails on the left hand, and was diagnosed as having Möbius' syndrome. Involvement of other cranial nerves such as three, four, five, nine, 9 and 12, and limb malformations may accompany this syndrome...
September 2017: Türk Pediatri Arşivi
https://www.readbyqxmd.com/read/29028131/a-motion-analysis-protocol-for-kinematic-assessment-of-poly-articulated-prosthetic-hands-with-cosmetic-gloves
#9
Andrea Giovanni Cutti, Francesca Cordella, Giulia D'Amico, Rinaldo Sacchetti, Angelo Davalli, Eugenio Guglielmelli, Loredana Zollo
To provide upper-limb amputees with devices that best fit their needs and to test innovative solutions, it is necessary to quantitatively appraise a device performance with rigorous measurement methods. The aim of this work was to define an optimal motion analysis protocol, suitable for optoelectronic systems, to measure the kinematics of poly-articulated hands even when covered by a cosmetic glove. This is a fundamental aspect, because gloves can decrease device speed and range of motion and, ultimately, patients' acceptance of the artificial limb...
October 13, 2017: Artificial Organs
https://www.readbyqxmd.com/read/29025427/adaptive-hybrid-robotic-system-for-rehabilitation-of-reaching-movement-after-a-brain-injury-a-usability-study
#10
F Resquín, J Gonzalez-Vargas, J Ibáñez, F Brunetti, I Dimbwadyo, L Carrasco, S Alves, C Gonzalez-Alted, A Gomez-Blanco, J L Pons
BACKGROUND: Brain injury survivors often present upper-limb motor impairment affecting the execution of functional activities such as reaching. A currently active research line seeking to maximize upper-limb motor recovery after a brain injury, deals with the combined use of functional electrical stimulation (FES) and mechanical supporting devices, in what has been previously termed hybrid robotic systems. This study evaluates from the technical and clinical perspectives the usability of an integrated hybrid robotic system for the rehabilitation of upper-limb reaching movements after a brain lesion affecting the motor function...
October 12, 2017: Journal of Neuroengineering and Rehabilitation
https://www.readbyqxmd.com/read/29017490/germline-mutation-within-col2a1-associated-with-lethal-chondrodysplasia-in-a-polled-holstein-family
#11
Sina Reinartz, Hartmut Mohwinkel, Christian Sürie, Maren Hellige, Karsten Feige, Deborah Eikelberg, Andreas Beineke, Julia Metzger, Ottmar Distl
BACKGROUND: The bulldog calf syndrome is a lethal form of the inherited congenital chondrodysplasias. Among the progeny of the polled Holstein bull Energy P cases of lethal chondrodysplasia were observed. Pedigrees of the cases and the frequency of 3/8 cases among the offspring of Energy P at our teaching and experimental farm Ruthe (LuFG Ruthe) supported the assumption of a germline mutation with a mosaic of normal and defective sperm. RESULTS: All three malformed calves were examined using necropsy, histopathology and computed tomography scanning...
October 10, 2017: BMC Genomics
https://www.readbyqxmd.com/read/28993523/giuliano-vanghetti-and-the-innovation-of-cineplastic-operations
#12
REVIEW
Peppino Tropea, Alberto Mazzoni, Silvestro Micera, Massimo Corbo
OBJECTIVE: Developing functional artificial limbs for amputees has been a centuries-old challenge in medicine. We review the mechanical and neurologic principles of "cineplastic operations" and "plastic motors" used to restore movements in prostheses, with special attention to the work of Giuliano Vanghetti. METHODS: We evaluated original publications describing cineplastic operations, biographic information, writings, drawings, and unpublished letters from the Vanghetti library, preserved in Empoli, Italy, and performed a bibliographic search and comparison for similar procedures in the literature...
October 10, 2017: Neurology
https://www.readbyqxmd.com/read/28980174/a-24-month-evaluation-of-a-percutaneous-osseointegrated-limb-skin-interface-in-an-ovine-amputation-model
#13
Sujee Jeyapalina, James Peter Beck, Jayant Agarwal, Kent N Bachus
Percutaneous osseointegrated (OI) prostheses directly connect an artificial limb to the residual appendicular skeleton via a permanently implanted endoprosthesis with a bridging connector that protrudes through the skin. The resulting stoma produces unique medical and biological challenges. Previously, a study using a large animal amputation model indicated that infection could be largely prevented, for at least a 12-month period, but the terminal epithelium continued to downgrow. The current study was undertaken to test the longer-term efficacy of this implant construct to maintain a stable skin-implant interface for 24 months...
October 4, 2017: Journal of Materials Science. Materials in Medicine
https://www.readbyqxmd.com/read/28956202/in-vivo-biocompatibility-of-porous-and-non-porous-polypyrrole-based-trilayered-actuators
#14
Bill G X Zhang, Geoffrey M Spinks, Robert Gorkin, Danial Sangian, Claudia Di Bella, Anita F Quigley, Robert M I Kapsa, Gordon G Wallace, Peter F M Choong
Trilayered polypyrrole (PPy) actuators have high stress density, low modulus and have wide potential biological applications including use in artificial muscles and in limb prosthesis after limb amputation. This article examines the in vivo biocompatibility of actuators in muscle using rabbit models. The actuators were specially designed with pores to encourage tissue in growth; this study also assessed the effect of such pores on the stability of the actuators in vivo. Trilayered PPy actuators were either laser cut with 150 µm pores or left pore-less and implanted into rabbit muscle for 3 days, 2 weeks, 4 weeks and 8 weeks and retrieved subsequently for histological analysis...
September 27, 2017: Journal of Materials Science. Materials in Medicine
https://www.readbyqxmd.com/read/28883491/lateral-movements-of-a-massive-tail-influence-gecko-locomotion-an-integrative-study-comparing-tail-restriction-and-autotomy
#15
Kevin Jagnandan, Timothy E Higham
Tails are an intricate component of the locomotor system for many vertebrates. Leopard geckos (Eublepharis macularius) possess a large tail that is laterally undulated during steady locomotion. However, the tail is readily shed via autotomy, resulting in the loss of tail function, loss in body mass, and a cranial shift in the center of mass. To elucidate the function of tail undulations, we investigated changes in limb kinematics after manipulating the tail artificially by restricting tail undulations and naturally by removing the tail via autotomy...
September 7, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28880183/gaussian-process-autoregression-for-simultaneous-proportional-multi-modal-prosthetic-control-with-natural-hand-kinematics
#16
Michele Xiloyannis, Constantinos Gavriel, Andreas A C Thomik, A Aldo Faisal
Matching the dexterity, versatility and robustness of the human hand is still an unachieved goal in bionics, robotics and neural engineering. A major limitation for hand prosthetics lies in the challenges of reliably decoding user intention from muscle signals when controlling complex robotic hands. Most of the commercially available prosthetic hands use musclerelated signals to decode a finite number of predefined motions and some offer proportional control of open/close movements of the whole hand. Here, in contrast, we aim to offer users flexible control of individual joints of their artificial hand...
August 31, 2017: IEEE Transactions on Neural Systems and Rehabilitation Engineering
https://www.readbyqxmd.com/read/28874773/cortical-and-trabecular-morphology-is-altered-in-the-limb-bones-of-mice-artificially-selected-for-faster-skeletal-growth
#17
Saira Farooq, Shannon Leussink, Leah M Sparrow, Marta Marchini, Hayley M Britz, Sarah L Manske, Campbell Rolian
Bone strength is influenced by mineral density and macro- and microstructure. Research into factors that contribute to bone morphology and strength has focused on genetic, environmental and morphological factors (e.g., body mass index), but little is known regarding the impact of rates of skeletal elongation on adult skeletal morphology and strength. Using micro-CT, we examined the impact of rates of skeletal elongation on bone cortical and trabecular morphology, and on rates of estrogen-dependent bone loss in the tibia in CD-1 mice, and in mice with accelerated skeletal growth (Longshanks)...
September 5, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28872119/intravital-microscopy-of-monocyte-homing-and-tumor-related-angiogenesis-in-a-murine-model-of-peripheral-arterial-disease
#18
Martin Wagner, Claudia Baer, Werner Zuschratter, Monika Riek-Burchardt, Christian Deffge, Soenke Weinert, Jerry C Lee, Ruediger C Braun-Dullaeus, Joerg Herold
The therapeutic goal for peripheral arterial disease and ischemic heart disease is to increase blood flow to ischemic areas caused by hemodynamic stenosis. Vascular surgery is a viable option in selected cases, but for patients without indications for surgery such as progression to rest pain, critical limb ischemia, or major disruptions to life or work, there are few possibilities for mitigating their disease. Cell therapy via monocyte-enhanced perfusion through the stimulation of collateral formation is one of a few non-invasive options...
August 26, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/28854522/an-investigation-on-effects-of-amputee-s-physiological-parameters-on-maximum-pressure-developed-at-the-prosthetic-socket-interface-using-artificial-neural-network
#19
Chitresh Nayak, Amit Singh, Himanshu Chaudhary, Deepak Rajendra Unune
Technological advances in prosthetics have attracted the curiosity of researchers in monitoring design and developments of the sockets to sustain maximum pressure without any soft tissue damage, skin breakdown, and painful sores. Numerous studies have been reported in the area of pressure measurement at the limb/socket interface, though, the relation between amputee's physiological parameters and the pressure developed at the limb/socket interface is still not studied. Therefore, the purpose of this work is to investigate the effects of patient-specific physiological parameters viz...
October 23, 2017: Technology and Health Care: Official Journal of the European Society for Engineering and Medicine
https://www.readbyqxmd.com/read/28814023/representing-high-dimensional-data-to-intelligent-prostheses-and-other-wearable-assistive-robots-a-first-comparison-of-tile-coding-and-selective-kanerva-coding
#20
Jaden B Travnik, Patrick M Pilarski
Prosthetic devices have advanced in their capabilities and in the number and type of sensors included in their design. As the space of sensorimotor data available to a conventional or machine learning prosthetic control system increases in dimensionality and complexity, it becomes increasingly important that this data be represented in a useful and computationally efficient way. Well structured sensory data allows prosthetic control systems to make informed, appropriate control decisions. In this study, we explore the impact that increased sensorimotor information has on current machine learning prosthetic control approaches...
July 2017: IEEE ... International Conference on Rehabilitation Robotics: [proceedings]
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