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https://www.readbyqxmd.com/read/28820835/simultaneous-stiles-bunnell-tendon-transfer-enhances-intrinsic-function-of-the-second-toe-transplantations
#1
Yu-Te Lin, Charles Yuen Yung Loh, Shwu-Huei Lien, Chih-Hung Lin, Fu-Chan Wei
Claw finger is sequelae of fingers without intrinsic function. Claw toe deformity is common after toe transfers as simultaneous intrinsic reconstruction has yet to be reported in the literature. We present our experience of simultaneous tendon transfers during the second toe transplantation. Seven 2nd toe transfers were performed in 5 metacarpal-like and metacarpal hands. The Stiles-Bunnell tendon transfer was incorporated into toe transfers. Toe lumbrical tendons were repaired to the Flexor Digitorum Sublimis of the same recipient digit...
August 8, 2017: Plastic and Reconstructive Surgery
https://www.readbyqxmd.com/read/28815625/association-of-transcallosal-motor-fibres-with-function-of-both-hands-after-unilateral-neonatal-arterial-ischemic-stroke
#2
Samuel Groeschel, Lucie Hertz-Pannier, Matthieu Delion, Sébastien Loustau, Béatrice Husson, Manoelle Kossorotoff, Cyrille Renaud, Sylvie Nguyen The Tich, Stéphane Chabrier, Mickael Dinomais
AIM: The objective of this study was to investigate the involvement of the motor fibres of the corpus callosum after unilateral neonatal arterial ischemic stroke (NAIS) of the middle cerebral artery territory and the relationship to both ipsilesional and contralesional hand function. METHOD: Using high-resolution structural magnetic resonance imaging (MRI), functional MRI, and magnetic resonance diffusion-tractography, we compared the midsagittal area of the motor part of the corpus callosum (defined by the fibres connecting the precentral gyri) between 33 7-year-old children after unilateral NAIS and 31 typically developing 7-year-old children...
August 17, 2017: Developmental Medicine and Child Neurology
https://www.readbyqxmd.com/read/28814035/decoding-of-individual-finger-movements-from-surface-emg-signals-using-vector-autoregressive-hierarchical-hidden-markov-models-varhhmm
#3
Nebojsa Malesevic, Dimitrije Markovic, Gunter Kanitz, Marco Controzzi, Christian Cipriani, Christian Antfolk
In this paper we present a novel method for predicting individual fingers movements from surface electromyography (EMG). The method is intended for real-time dexterous control of a multifunctional prosthetic hand device. The EMG data was recorded using 16 single-ended channels positioned on the forearm of healthy participants. Synchronously with the EMG recording, the subjects performed consecutive finger movements based on the visual cues. Our algorithm could be described in following steps: extracting mean average value (MAV) of the EMG to be used as the feature for classification, piece-wise linear modeling of EMG feature dynamics, implementation of hierarchical hidden Markov models (HHMM) to capture transitions between linear models, and implementation of Bayesian inference as the classifier...
July 2017: IEEE ... International Conference on Rehabilitation Robotics: [proceedings]
https://www.readbyqxmd.com/read/28814032/studying-the-implementation-of-iterative-impedance-control-for-assistive-hand-rehabilitation-using-an-exoskeleton
#4
T Martineau, R Vaidyanathan
A positive training synergy can be obtained when two individuals attempt to learn the same motor task while mechanically coupled to one another. In this paper, we have studied how mimicking this interaction through impedance control can be exploited to improve assistance delivered by hand exoskeleton devices during rehabilitation. In this context, the machine and user take complementary roles akin to two coupled individuals. We present the derivation of a dynamic model of the human hand for the purpose of controller development for new hand exoskeleton platforms...
July 2017: IEEE ... International Conference on Rehabilitation Robotics: [proceedings]
https://www.readbyqxmd.com/read/28814010/multi-modal-myocontrol-testing-combined-force-and-electromyography
#5
Markus Nowak, Thomas Eiband, Claudio Castellini
Myocontrol, that is control of prostheses using bodily signals, has proved in the decades to be a surprisingly hard problem for the scientific community of assistive and rehabilitation robotics. In particular, traditional surface electromyography (sEMG) seems to be no longer enough to guarantee dexterity (i.e., control over several degrees of freedom) and, most importantly, reliability. Multi-modal myocontrol is concerned with the idea of using novel signal gathering techniques as a replacement of, or alongside, sEMG, to provide high-density and diverse signals to improve dexterity and make the control more reliable...
July 2017: IEEE ... International Conference on Rehabilitation Robotics: [proceedings]
https://www.readbyqxmd.com/read/28810960/talk-to-the-hand-u-s-army-biophysical-testing
#6
William R Santee, Adam W Potter, Karl E Friedl
BACKGROUND: Many people are unaware of the science underlying the biophysical properties of Soldier clothing and personal protective equipment, yet there is a well-refined biomedical methodology initiated by Army physiologists in World War II. This involves a methodical progression of systematic material testing technologies, computer modeling, and human testing that enables more efficient development and rapid evaluation of new concepts for Soldier health and performance. Sophisticated manikins that sweat and move are a central part of this testing continuum...
July 2017: Military Medicine
https://www.readbyqxmd.com/read/28809628/-the-effect-of-activation-of-the-shoulder-girdle-muscles-on-functional-outcomes-of-rehabilitation-in-patients-with-surgically-treated-distal-radius-fractures
#7
V Jančíková, J Opavský, P Dráč, A Krobot, I Čižmář
PURPOSE OF THE STUDY The aim of the study was to assess the functional outcomes of rehabilitation in patients with surgically treated distal radius fractures in the early postoperative period. We compared the functional outcomes of patients undergoing standard rehabilitation with the group of patients whose postoperative rehabilitation was extended with shoulder girdle exercises of the affected upper limb while the wrist was immobilized. Several indices and variables were used for the assessment of the functional therapeutic outcomes of the affected wrist...
2017: Acta Chirurgiae Orthopaedicae et Traumatologiae Cechoslovaca
https://www.readbyqxmd.com/read/28800429/bimanual-coordination-positively-predicts-episodic-memory-a-combined-behavioral-and-mri-investigation
#8
Keith B Lyle, Brynn A Dombroski, Leonard Faul, Robin F Hopkins, Farah Naaz, Andrew E Switala, Brendan E Depue
Some people remember events more completely and accurately than other people, but the origins of individual differences in episodic memory are poorly understood. One way to advance understanding is by identifying characteristics of individuals that reliably covary with memory performance. Recent research suggests motor behavior is related to memory performance, with individuals who consistently use a single preferred hand for unimanual actions performing worse than individuals who make greater use of both hands...
August 8, 2017: Brain and Cognition
https://www.readbyqxmd.com/read/28791721/cortical-control-of-object-specific-grasp-relies-on-adjustments-of-both-activity-and-effective-connectivity-a-common-marmoset-study
#9
Banty Tia, Mitsuaki Takemi, Akito Kosugi, Elisa Castagnola, Alberto Ansaldo, Takafumi Nakamura, Davide Ricci, Junichi Ushiba, Luciano Fadiga, Atsushi Iriki
The cortical mechanisms of grasping have been extensively studied in macaques and humans. Here, we investigated whether common marmosets could rely on similar mechanisms despite striking differences in manual dexterity. Two common marmosets were trained to grasp-and-pull three objects eliciting different hand configurations: whole-hand, finger and scissor grips. The animals were then chronically implanted with 64-channel electrocorticogram arrays positioned over the left premotor, primary motor and somatosensory cortex...
August 9, 2017: Journal of Physiology
https://www.readbyqxmd.com/read/28774483/clinical-relevance-commentary-in-response-to-effectiveness-of-a-fine-motor-skills-rehabilitation-program-on-upper-limb-disability-manual-dexterity-pinch-strength-range-of-finger-motion-performance-in-activities-of-daily-living-functional-independence-and-general
#10
https://www.readbyqxmd.com/read/28768847/cross-sectional-analysis-of-a-large-cohort-with-x-linked-charcot-marie-tooth-disease-cmtx1
#11
Francis B Panosyan, Matilde Laura, Alexander M Rossor, Chiara Pisciotta, Giuseppe Piscosquito, Joshua Burns, Jun Li, Sabrina W Yum, Richard A Lewis, John Day, Rita Horvath, David N Herrmann, Michael E Shy, Davide Pareyson, Mary M Reilly, Steven S Scherer
OBJECTIVE: To extend the phenotypic description of Charcot-Marie-Tooth disease (CMTX1) and to draw new genotype-phenotype relationships. METHODS: Mutations in GJB1 cause the main X-linked form of CMTX (CMTX1). We report cross-sectional data from 160 patients (from 120 different families, with 89 different mutations) seen at the Inherited Neuropathies Consortium centers. RESULTS: We evaluated 87 males who had a mean age of 41 years (range 10-78 years) and 73 females who had a mean age of 46 years (range 15-84 years)...
August 2, 2017: Neurology
https://www.readbyqxmd.com/read/28763703/multifractal-foundations-of-visually-guided-aiming-and-adaptation-to-prismatic-perturbation
#12
Nicole S Carver, Danica Bojovic, Damian G Kelty-Stephen
Visually-guided action of tossing to a target allows examining coordination between mechanical information for maintaining posture while throwing and visual information for aiming. Previous research indicates that relationships between visual and mechanical information persist in tossing behavior long enough for mechanical cues to prompt recall of past visual impressions. Multifractal analysis might model the long-term coordinations among movement components as visual information changes. We asked 32 adult participants (6 female, 25 male, one not conforming to gender binary; aged M=19...
July 29, 2017: Human Movement Science
https://www.readbyqxmd.com/read/28744066/effects-of-robot-assisted-training-for-the-unaffected-arm-in-patients-with-hemiparetic-cerebral-palsy-a-proof-of-concept-pilot-study
#13
Alessandro Picelli, Elisabetta La Marchina, Antonella Vangelista, Elena Chemello, Angela Modenese, Marialuisa Gandolfi, Elisa Francesca Maria Ciceri, Alessandra Bucci, Giada Zoccatelli, Leopold Saltuari, Andreas Waldner, Alessio Baricich, Andrea Santamato, Nicola Smania
On a voluntary basis, 10 adolescents with hemiparesis due to cerebral palsy and 11 neurologically healthy control subjects participated in this proof-of-concept pilot study. The aim was to examine the effects of robot-assisted training for the unaffected arm in patients with hemiparetic cerebral palsy. Baseline comparison between the unaffected arm of the hemiparetic patients with cerebral palsy and the dominant arm of healthy control subjects showed significant differences on the Jebsen-Taylor Hand Function test and action planning ability tests...
2017: Behavioural Neurology
https://www.readbyqxmd.com/read/28734971/robotic-assistance-confers-ambidexterity-to-laparoscopic-surgeons
#14
Souzana Choussein, Serene S Srouji, Leslie V Farland, Ashley Wietsma, Stacey A Missmer, Michael Hollis, Richard N Yu, Charles N Pozner, Antonio R Gargiulo
STUDY OBJECTIVE: To examine whether a robotic surgical platform can complement the fine motor skills of the non-dominant hand, compensating for the innate difference in dexterity between the surgeon's hands, thereby conferring virtual ambidexterity. DESIGN: Crossover intervention study. DESIGN CLASSIFICATION: Level II-1 evidence. SETTING: Centers for medical simulation of two tertiary care hospitals of Harvard Medical School...
July 19, 2017: Journal of Minimally Invasive Gynecology
https://www.readbyqxmd.com/read/28729058/impacts-of-sensation-perception-and-motor-abilities-of-the-ipsilesional-upper-limb-on-hand-functions-in-unilateral-stroke-quantifications-from-biomechanical-and-functional-perspectives
#15
Hsiu-Yun Hsu, Chia-Wen Ke, Ta-Shen Kuan, Hsiu-Ching Yang, Ching-Liang Tsai, Li-Chieh Kuo
BACKGROUND: The presence of subtle losses in hand dexterity after stroke affects the regaining of independence with regard to activities of daily living. Therefore, awareness of ipsilesional upper extremity (UE) function may be of importance when developing a comprehensive rehabilitation program. However, current hand function tests seem to be unable to identify asymptomatic UE impairments. OBJECTIVES: To assess the motor coordination as well as the sensory perception of an ipsilesional UE using biomechanical analysis of performance-oriented tasks and conducting a Manual Tactile Test (MTT)...
July 17, 2017: PM & R: the Journal of Injury, Function, and Rehabilitation
https://www.readbyqxmd.com/read/28722685/neural-control-of-finger-movement-via-intracortical-brain-machine-interface
#16
Zachary T Irwin, Karen E Schroeder, Philip P Vu, Autumn J Bullard, Derek M Tat, Chrono S Nu, Alex Vaskov, Samuel R Nason, David E Thompson, Nicole Bentley, Parag G Patil, Cynthia A Chestek
OBJECTIVE: Intracortical brain-machine interfaces (BMIs) are a promising source of prosthesis control signals for individuals with severe motor disabilities. Previous BMI studies have primarily focused on predicting and controlling whole-arm movements; precise control of hand kinematics, however, has not been fully demonstrated. Here, we investigate the continuous decoding of precise finger movements in rhesus macaques. APPROACH: In order to elicit precise and repeatable finger movements, we have developed a novel behavioral task paradigm which requires the subject to acquire virtual fingertip position targets...
July 19, 2017: Journal of Neural Engineering
https://www.readbyqxmd.com/read/28721628/disease-activity-handgrip-strengths-and-hand-dexterity-in-patients-with-rheumatoid-arthritis
#17
D Palamar, G Er, R Terlemez, I Ustun, G Can, M Saridogan
Rheumatoid arthritis (RA) is a chronic inflammatory disease affecting the hand joints and leading to impairment in hand functions. Evaluation of functional impairment is necessary for assessing patient's quality of life, disease activity, and treatment outcome. To date, many scientific studies assessed the disease activity of patients with RA, but little attention has been carried out to assess these patients' hand functions and dexterity. The purposes of this study were to determine the clinical relevance of the Quick Disabilities of the Arm, Shoulder, and Hand (QuickDASH), hand dexterity with the Purdue Pegboard Test (PPT), and handgrip strength and pinch strengths of RA patients and to look into their relation between each other...
July 18, 2017: Clinical Rheumatology
https://www.readbyqxmd.com/read/28713231/grip-force-and-3d-push-pull-force-estimation-based-on-semg-and-grnn
#18
Changcheng Wu, Hong Zeng, Aiguo Song, Baoguo Xu
The estimation of the grip force and the 3D push-pull force (push and pull force in the three dimension space) from the electromyogram (EMG) signal is of great importance in the dexterous control of the EMG prosthetic hand. In this paper, an action force estimation method which is based on the eight channels of the surface EMG (sEMG) and the Generalized Regression Neural Network (GRNN) is proposed to meet the requirements of the force control of the intelligent EMG prosthetic hand. Firstly, the experimental platform, the acquisition of the sEMG, the feature extraction of the sEMG and the construction of GRNN are described...
2017: Frontiers in Neuroscience
https://www.readbyqxmd.com/read/28688170/influence-of-orthopedic-reinforced-gloves-versus-double-standard-gloves-on-contamination-events-during-small-animal-orthopedic-surgery
#19
Galina Hayes, Ameet Singh, Tom Gibson, Noel Moens, Michelle Oblak, Adam Ogilvie, Debbie Reynolds
OBJECTIVE: To determine the influence of orthopedic reinforced gloves on contamination events during small animal orthopedic surgery. STUDY DESIGN: Prospective randomized controlled trial SAMPLE POPULATION: Two hundred and thirty-seven pairs of orthopedic gloves (474 gloves) and 203 pairs of double standard gloves (812 gloves) worn during 193 orthopedic procedures. METHODS: Primary and assistant surgeons were randomized to wear either orthopedic reinforced gloves or double gloves...
July 8, 2017: Veterinary Surgery: VS
https://www.readbyqxmd.com/read/28673883/microsurgical-performance-after-sleep-interruption-a-neurotouch-simulator-study
#20
Alexander Micko, Karoline Knopp, Engelbert Knosp, Stefan Wolfsberger
OBJECTIVE: In times of the ubiquitous debate about doctors' working hour restrictions, it is still questionable if the physician's performance is impaired by high workload and long shifts. In this study we evaluated the impact of sleep interruption on the neurosurgical performance. METHODS: Ten medical students and ten neurosurgical residents were tested on the virtual-reality simulator NeuroTouch by performing the identical microsurgical task, well-rested (baseline test), and after sleep interruption at night (stress test)...
June 30, 2017: World Neurosurgery
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