keyword
MENU ▼
Read by QxMD icon Read
search

Artificial limbs

keyword
https://www.readbyqxmd.com/read/28040606/steinert-syndrome-and-repercussions-in-dental-medicine
#1
REVIEW
Helena Baptista, Inês Lopes Cardoso
Steinert syndrome, also called myotonic dystrophy type 1, is a genetic disorder with autosomal dominant transmission characterized by myotonia and a multisystemic clinical picture that affects several tissues of the human body. The most common systemic phenotypes are: muscular, cardiac, respiratory, CNS, ocular, gynecological, digestive, orthopedical, as well as cognitive and psychological symptoms (cognitive decline). Muscles involved in voluntary movement are highly affected by myotonia especially distal muscles of upper limbs...
December 23, 2016: Archives of Oral Biology
https://www.readbyqxmd.com/read/27994147/ownership-of-an-artificial-limb-induced-by-electrical-brain-stimulation
#2
Kelly L Collins, Arvid Guterstam, Jeneva Cronin, Jared D Olson, H Henrik Ehrsson, Jeffrey G Ojemann
Replacing the function of a missing or paralyzed limb with a prosthetic device that acts and feels like one's own limb is a major goal in applied neuroscience. Recent studies in nonhuman primates have shown that motor control and sensory feedback can be achieved by connecting sensors in a robotic arm to electrodes implanted in the brain. However, it remains unknown whether electrical brain stimulation can be used to create a sense of ownership of an artificial limb. In this study on two human subjects, we show that ownership of an artificial hand can be induced via the electrical stimulation of the hand section of the somatosensory (SI) cortex in synchrony with touches applied to a rubber hand...
January 3, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/27992345/continuous-estimation-of-human-multi-joint-angles-from-semg-using-a-state-space-model
#3
Qichuan Ding, Jianda Han, Xingang Zhao
Due to the couplings among joint-relative muscles, it is a challenge to accurately estimate continuous multi-joint movements from multi-channel sEMG signals. Traditional approaches always build a nonlinear regression model, such as artificial neural network, to predict the multi-joint movement variables using sEMG as inputs. However, the redundant sEMGdata are always not distinguished; the prediction errors cannot be evaluated and corrected online as well. In this work, a correlation-based redundancy-segmentation method is proposed to segment the sEMG-vector including redundancy into irredundant and redundant subvectors...
December 14, 2016: IEEE Transactions on Neural Systems and Rehabilitation Engineering
https://www.readbyqxmd.com/read/27983626/design-and-optimization-of-a-hybrid-driven-waist-rehabilitation-robot
#4
Bin Zi, Guangcai Yin, Dan Zhang
In this paper a waist rehabilitation robot driven by cables and pneumatic artificial muscles (PAMs) has been conceptualized and designed. In the process of mechanism design, the human body structure, the waist movement characteristics, and the actuators' driving characteristics are the main considerable factors to make the hybrid-driven waist rehabilitation robot (HWRR) cost-effective, safe, flexible, and well-adapted. A variety of sensors are chosen to measure the position and orientation of the recovery patient to ensure patient safety at the same time as the structure design...
December 14, 2016: Sensors
https://www.readbyqxmd.com/read/27977642/quickstats-use-of-equipment-or-assistance-for-getting-around-among-persons-aged-%C3%A2-50-years-national-health-interview-survey-2014-2015%C3%A2
#5
(no author information available yet)
In 2014-2015, 13.9% of persons aged ≥50 years used equipment or received assistance for getting around. Specifically, 9.6% of persons aged ≥50 years used a cane or walking stick, 5.8% used a walker or Zimmer frame, and 5.3% had assistance from another person. Wheelchairs or scooters were used by 3.5%, crutches by 0.7%, and artificial limbs by 0.6%.
December 16, 2016: MMWR. Morbidity and Mortality Weekly Report
https://www.readbyqxmd.com/read/27849464/a-review-of-unique-considerations-for-female-veterans-with-amputation
#6
Billie J Randolph, Leif M Nelson, M Jason Highsmith
This article explores unique considerations that face both women living with limb loss and their health care providers. This demographic of patient has a higher rate of artificial limb rejection, thus challenging providers to address needs for cosmesis and function that varies from those of male counterparts. Health care providers for women with amputations, such as the Veterans Affairs, must evolve health care delivery, research practices, and work jointly with industry in order to meet the needs of this population...
November 2016: Military Medicine
https://www.readbyqxmd.com/read/27847323/pigeonetics-takes-flight-evolution-development-and-genetics-of-intraspecific-variation
#7
REVIEW
Eric T Domyan, Michael D Shapiro
Intensive artificial selection over thousands of years has produced hundreds of varieties of domestic pigeon. As Charles Darwin observed, the morphological differences among breeds can rise to the magnitude of variation typically observed among different species. Nevertheless, different pigeon varieties are interfertile, thereby enabling forward genetic and genomic approaches to identify genes that underlie derived traits. Building on classical genetic studies of pigeon variation, recent molecular investigations find a spectrum of coding and regulatory alleles controlling derived traits, including plumage color, feather growth polarity, and limb identity...
November 12, 2016: Developmental Biology
https://www.readbyqxmd.com/read/27833537/forward-prediction-in-the-posterior-parietal-cortex-and-dynamic-brain-machine-interface
#8
He Cui
While remarkable progress has been made in brain-machine interfaces (BMIs) over the past two decades, it is still difficult to utilize neural signals to drive artificial actuators to produce predictive movements in response to dynamic stimuli. In contrast to naturalistic limb movements largely based on forward planning, brain-controlled neuroprosthetics mainly rely on feedback without prior trajectory formation. As an important sensorimotor interface integrating multisensory inputs and efference copy, the posterior parietal cortex (PPC) might play a proactive role in predictive motor control...
2016: Frontiers in Integrative Neuroscience
https://www.readbyqxmd.com/read/27815182/key-considerations-in-designing-a-somatosensory-neuroprosthesis
#9
Benoit P Delhaye, Hannes P Saal, Sliman J Bensmaia
In recent years, a consensus has emerged that somatosensory feedback needs to be provided for upper limb neuroprostheses to be useful. An increasingly promising approach to sensory restoration is to electrically stimulate neurons along the somatosensory neuraxis to convey information about the state of the prosthetic limb and about contact with objects. To date, efforts towards artificial sensory feedback have consisted mainly of demonstrating that some sensory information could be conveyed using a small number of stimulation patterns, generally delivered through single electrodes...
November 1, 2016: Journal of Physiology, Paris
https://www.readbyqxmd.com/read/27807418/evaluating-emg-feature-and-classifier-selection-for-application-to-partial-hand-prosthesis-control
#10
Adenike A Adewuyi, Levi J Hargrove, Todd A Kuiken
Pattern recognition-based myoelectric control of upper-limb prostheses has the potential to restore control of multiple degrees of freedom. Though this control method has been extensively studied in individuals with higher-level amputations, few studies have investigated its effectiveness for individuals with partial-hand amputations. Most partial-hand amputees retain a functional wrist and the ability of pattern recognition-based methods to correctly classify hand motions from different wrist positions is not well studied...
2016: Frontiers in Neurorobotics
https://www.readbyqxmd.com/read/27799908/assessment-of-myoelectric-controller-performance-and-kinematic-behavior-of-a-novel-soft-synergy-inspired-robotic-hand-for-prosthetic-applications
#11
Simone Fani, Matteo Bianchi, Sonal Jain, José Simões Pimenta Neto, Scott Boege, Giorgio Grioli, Antonio Bicchi, Marco Santello
Myoelectric artificial limbs can significantly advance the state of the art in prosthetics, since they can be used to control mechatronic devices through muscular activity in a way that mimics how the subjects used to activate their muscles before limb loss. However, surveys indicate that dissatisfaction with the functionality of terminal devices underlies the widespread abandonment of prostheses. We believe that one key factor to improve acceptability of prosthetic devices is to attain human likeness of prosthesis movements, a goal which is being pursued by research on social and human-robot interactions...
2016: Frontiers in Neurorobotics
https://www.readbyqxmd.com/read/27798422/epidural-and-transcutaneous-spinal-electrical-stimulation-for-restoration-of-movement-after-incomplete-and-complete-spinal-cord-injury
#12
Winfried Mayr, Matthias Krenn, Milan R Dimitrijevic
PURPOSE OF REVIEW: The Purpose of this review is to outline and explain the therapeutic use of electrical spinal cord stimulation (SCS) for modification of spinal motor output. Central functional stimulation provides afferent input to posterior root neurons and is applied to improve volitional movements, posture and their endurance, control spasticity, and improve bladder function or perfusion in the lower limbs. Clinical accomplishments strongly depend on each individual's physiological state and specific methodical adaptation to that physiological state...
December 2016: Current Opinion in Neurology
https://www.readbyqxmd.com/read/27797958/the-neural-basis-of-perceived-intensity-in-natural-and-artificial-touch
#13
Emily L Graczyk, Matthew A Schiefer, Hannes P Saal, Benoit P Delhaye, Sliman J Bensmaia, Dustin J Tyler
Electrical stimulation of sensory nerves is a powerful tool for studying neural coding because it can activate neural populations in ways that natural stimulation cannot. Electrical stimulation of the nerve has also been used to restore sensation to patients who have suffered the loss of a limb. We have used long-term implanted electrical interfaces to elucidate the neural basis of perceived intensity in the sense of touch. To this end, we assessed the sensory correlates of neural firing rate and neuronal population recruitment independently by varying two parameters of nerve stimulation: pulse frequency and pulse width...
October 26, 2016: Science Translational Medicine
https://www.readbyqxmd.com/read/27747394/advice-to-walk-after-meals-is-more-effective-for-lowering-postprandial-glycaemia-in-type-2-diabetes-mellitus-than-advice-that-does-not-specify-timing-a-randomised-crossover-study
#14
Andrew N Reynolds, Jim I Mann, Sheila Williams, Bernard J Venn
AIMS/HYPOTHESIS: Regular physical activity is a cornerstone of diabetes management. We conducted a study to evaluate whether specifying the timing of walking in relation to meals enhances the benefits conferred by current physical activity guidelines. METHODS: A total of 41 adults with type 2 diabetes mellitus (mean ± SD age 60 ± 9.9 years; mean diabetes duration 10 years) participated in this randomised, crossover study. Randomisation was by a computer-generated protocol...
October 17, 2016: Diabetologia
https://www.readbyqxmd.com/read/27730646/vestibular-feedback-maintains-reaching-accuracy-during-body-movement
#15
Craig P Smith, Raymond F Reynolds
KEY POINTS: Reaching movements can be perturbed by vestibular input, but the function of this response is unclear. Here, we applied galvanic vestibular stimulation concurrently with real body movement while subjects maintained arm position either fixed in space or fixed with respect to their body. During the fixed-in-space conditions, galvanic vestibular stimulation caused large changes in arm trajectory consistent with a compensatory response to maintain upper-limb accuracy in the face of body movement...
October 12, 2016: Journal of Physiology
https://www.readbyqxmd.com/read/27667570/osteoblast-differentiation-at-a-glance
#16
Arkady Rutkovskiy, Kåre-Olav Stensløkken, Ingvar Jarle Vaage
Ossification is a tightly regulated process, performed by specialized cells called osteoblasts. Dysregulation of this process may cause inadequate or excessive mineralization of bones or ectopic calcification, all of which have grave consequences for human health. Understanding osteoblast biology may help to treat diseases such as osteogenesis imperfecta, calcific heart valve disease, osteoporosis, and many others. Osteoblasts are bone-building cells of mesenchymal origin; they differentiate from mesenchymal progenitors, either directly or via an osteochondroprogenitor...
September 26, 2016: Medical Science Monitor Basic Research
https://www.readbyqxmd.com/read/27651305/an-eye-blinking-based-beamforming-control-protocol-for-hearing-aid-users-with-neurological-motor-disease-or-limb-amputation
#17
Jungmin Yoon, Kyoung Won Nam, Jun Chang Lee, Dong Pyo Jang, In Young Kim
For hearing-impaired individuals with neurological motor deficits or finger/arm amputation due to accident or disease, hearing aid adjustment using a conventional finger manipulation-based remote controller is unavailable, and a more dedicated, hands-free alternative is required. In this study, we propose an eye-blinking-based beamforming control scheme for hearing aid users. Three electroencephalogram signals measured around the ears were utilized to detect eye-blinking patterns based on a three-layer artificial neural network...
September 21, 2016: Artificial Organs
https://www.readbyqxmd.com/read/27640345/assimilation-of-virtual-legs-and-perception-of-floor-texture-by-complete-paraplegic-patients-receiving-artificial-tactile-feedback
#18
Solaiman Shokur, Simone Gallo, Renan C Moioli, Ana Rita C Donati, Edgard Morya, Hannes Bleuler, Miguel A L Nicolelis
Spinal cord injuries disrupt bidirectional communication between the patient's brain and body. Here, we demonstrate a new approach for reproducing lower limb somatosensory feedback in paraplegics by remapping missing leg/foot tactile sensations onto the skin of patients' forearms. A portable haptic display was tested in eight patients in a setup where the lower limbs were simulated using immersive virtual reality (VR). For six out of eight patients, the haptic display induced the realistic illusion of walking on three different types of floor surfaces: beach sand, a paved street or grass...
2016: Scientific Reports
https://www.readbyqxmd.com/read/27627990/small-sided-football-games-on-sand-are-more-physical-demanding-but-less-technical-specific-compared-to-artificial-turf
#19
Vincenzo Rago, António N Rebelo, Federico Pizzuto, Daniel Barreira
BACKGROUND: The use of sand has been suggested as fitness-enhancing surface in field-based team sports. However, concerns have arisen in regard whether physical responses associated to sand training are sport-specific. We compared physical and technical demands during small-sided football games (4v4 + goalkeeper; SSGs) played on artificial turf and on sand. METHODS: Movement patterns, rating of perceived exertion (RPE) and technical parameters were obtained from eight adult male footballers (20...
September 15, 2016: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/27617633/toward-dendrite-free-lithium-deposition-via-structural-and-interfacial-synergistic-effects-of-3d-graphene-ni-scaffold
#20
Keyu Xie, Wenfei Wei, Kai Yuan, Wei Lu, Min Guo, Zhihua Li, Qiang Song, Xingrui Liu, Jian-Gan Wang, Chao Shen
Owing to its ultrahigh specific capacity and low electrochemical potential, lithium (Li) metal is regarded as one of the most attractive anode materials for next-generation lithium batteries. Nevertheless, the commercialization of Li-metal-based rechargeable batteries (LiMBs) has been retarded by the uncontrollable growth of Li dendrites, as well as the resulting poor cycle stability and safety hazards. In this work, a 3D graphene@Ni scaffold has been proposed to accomplish dendrite-free Li deposition via structural and interfacial synergistic effects...
October 5, 2016: ACS Applied Materials & Interfaces
keyword
keyword
10869
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"