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https://www.readbyqxmd.com/read/29683373/gesture-segmentation-and-classification-using-affine-speed-and-energy
#1
Jenny Cifuentes, Minh Tu Pham, Pierre Boulanger, Richard Moreau, Flavio Prieto
The characterization and analysis of hand gestures are challenging tasks with an important number of applications in human-computer interaction, machine vision and control, and medical gesture recognition. Specifically, several researchers have tried to develop objective evaluation methods of surgical skills for medical training. As a result, the adequate selection and extraction of similarities and differences between experts and novices have become an important challenge in this area. In particular, some of these works have shown that human movements performed during surgery can be described as a sequence of constant affine-speed trajectories...
April 1, 2018: Proceedings of the Institution of Mechanical Engineers. Part H, Journal of Engineering in Medicine
https://www.readbyqxmd.com/read/29683030/transcranial-direct-current-stimulation-enhances-motor-skill-learning-but-not-generalization-in-chronic-stroke
#2
Manuela Hamoudi, Heidi M Schambra, Brita Fritsch, Annika Schoechlin-Marx, Cornelius Weiller, Leonardo G Cohen, Janine Reis
BACKGROUND: Motor training alone or combined with transcranial direct current stimulation (tDCS) positioned over the motor cortex (M1) improves motor function in chronic stroke. Currently, understanding of how tDCS influences the process of motor skill learning after stroke is lacking. OBJECTIVE: To assess the effects of tDCS on the stages of motor skill learning and on generalization to untrained motor function. METHODS: In this randomized, sham-controlled, blinded study of 56 mildly impaired chronic stroke patients, tDCS (anode over the ipsilesional M1 and cathode on the contralesional forehead) was applied during 5 days of training on an unfamiliar, challenging fine motor skill task (sequential visual isometric pinch force task)...
April 1, 2018: Neurorehabilitation and Neural Repair
https://www.readbyqxmd.com/read/29680511/spinal-pa-movements-behave-as-if-there-are-limitations-of-local-segmental-mobility-and-are-large-enough-to-be-perceivable-by-manual-palpation-a-synthesis-of-the-literature
#3
Neil Tuttle, Charles Hazle
BACKGROUND: Posterio-anterior (PA) movements are one type of passive intervertebral movement used to assess and treat perceived deficits in localized segmental mobility. OBJECTIVES: To describe: 1) The specific effects that reductions in segmental mobility would be expected to have on PA movements; 2) How differences in PA movements in clinical situations compare to what would be expected with reduced segmental mobility; and 3) Whether such differences in PA movements are likely to be perceivable by manual palpation...
April 16, 2018: Musculoskeletal Science & Practice
https://www.readbyqxmd.com/read/29679247/neuromuscular-and-electromechanical-properties-of-ultra-power-athletes-the-traceurs
#4
Sidney Grosprêtre, Philippe Gimenez, Alain Martin
PURPOSE: Practising a power-type activity over years can shape the neuromuscular profile of athletes. This study aimed at comparing the neuromuscular profile of a non-trained group (NT, n = 10) to power athletes practising Parkour (= traceurs, group PK, n = 11), an activity consisting of jumping obstacles mostly in an urban landscape. METHODS: Maximal isometric plantar flexion force (MVC) and rate of torque development (RTD) were evaluated, and neuromuscular function of triceps surae muscles was assessed and compared between groups through the analysis of evoked potentials from posterior tibial nerve stimulation...
April 20, 2018: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/29678601/motor-transfer-from-the-corticospinal-to-the-corticobulbar-pathway
#5
Alayna E Ernster, Seoung Hoon Park, Basma K Yacoubi, Evangelos A Christou, Agostina Casamento-Moran, Michele L Singer, Ianessa A Humbert
There are multiple descending neural pathways, including the corticospinal pathway (CS) and the corticobulbar pathway (CB). The corticospinal pathway has been shown to exhibit within-pathway (CS-to-CS) motor transfer. However, motor transfer across each pathway (CS-to-CB or CB-to-CS) has yet to be studied in depth. The aim of the present study was to examine the effects of cross-pathway motor transfer between the ankle (CS) and tongue (CB) after training with a ballistic goal-directed motor task. Twelve healthy participants were recruited for this two-day experimental study...
April 17, 2018: Physiology & Behavior
https://www.readbyqxmd.com/read/29673837/movements-of-older-adults-during-exergaming-interventions-that-are-associated-with-the-systems-framework-for-postural-control-a-systematic-review
#6
REVIEW
Robin Tahmosybayat, Katherine Baker, Alan Godfrey, Nick Caplan, Gill Barry
One in three older adults fall annually, in part due to impairments in the physiological systems that make up the postural control (PC) system. Exercise, particularly balance training, helps to prevent deterioration and even to improve outcomes in the PC system. Exergaming (exercise-gaming) is interactive computer gaming whereby an individual moves the body in response to onscreen cues in a playful format. Exergaming is an alternative method to standard practice for improving PC outcomes, which has been shown to reduce the risk of falling...
May 2018: Maturitas
https://www.readbyqxmd.com/read/29673832/effects-of-physical-training-with-the-nintendo-wii-fit-plus-%C3%A2-and-protein-supplementation-on-musculoskeletal-function-and-the-risk-of-falls-in-pre-frail-older-women-protocol-for-a-randomized-controlled-clinical-trial-the-wiiprotein-study
#7
Audrin Said Vojciechowski, Simone Biesek, Jarbas Melo Filho, Estela Iraci Rabito, Maryelle Paula do Amaral, Anna Raquel Silveira Gomes
BACKGROUND: Frailty is one of the key geriatric syndromes and is related to the loss of functional independence. However, the practice of physical training (PT) combined with protein supplementation (PS) may improve musculoskeletal function (MF). OBJECTIVE: To verify the effect of PT using 'exergames' with or without PS on MF, nutritional status, and risk of falls in pre-frail older women. METHOD: The protocol is for a randomized controlled clinical trial with a sample of pre-frail older women, divided into 5 groups: control group; PT using exergames; PS; PT using exergames combined with PS; PT using exergames combined with isoenergetic supplementation...
May 2018: Maturitas
https://www.readbyqxmd.com/read/29673119/effects-of-fatiguing-submaximal-high-versus-low-torque-isometric-exercise-on-motor-unit-recruitment-and-firing-behavior
#8
Tyler W D Muddle, Ryan J Colquhoun, Mitchel A Magrini, Micheal J Luera, Jason M DeFreitas, Nathaniel D M Jenkins
The purpose of this investigation was to evaluate the effects of repeated, high- (HT: 70% MVIC) versus low-torque (LT: 30% MVIC) isometric exercise performed to failure on motor unit (MU) recruitment and firing behavior of the vastus lateralis. Eighteen resistance-trained males (23.1 ± 3.8 years) completed familiarization, followed by separate experimental sessions in which they completed either HT or LT exercise to failure in random order. LT exercise resulted in a greater time to task failure and a more dramatic decline in the muscle's force capacity, but the total work completed was similar for HT and LT exercise...
April 2018: Physiological Reports
https://www.readbyqxmd.com/read/29672614/adaptation-of-motor-unit-contractile-properties-in-rat-medial-gastrocnemius-to-treadmill-endurance-training-relationship-to-muscle-mitochondrial-biogenesis
#9
Katarzyna Kryściak, Joanna Majerczak, Jakub Kryściak, Dawid Łochyński, Dominik Kaczmarek, Hanna Drzymała-Celichowska, Piotr Krutki, Anna Gawedzka, Magdalena Guzik, Michał Korostynski, Zbigniew Szkutnik, Elżbieta Pyza, Wiesława Jarmuszkiewicz, Jerzy A Zoladz, Jan Celichowski
This study aimed at investigating the effects of 2, 4 and 8 weeks of endurance training on the contractile properties of slow (S), fast fatigue resistant (FR) and fast fatigable (FF) motor units (MUs) in rat medial gastrocnemius (MG) in relation to the changes in muscle mitochondrial biogenesis. The properties of functionally isolated MUs were examined in vivo. Mitochondrial biogenesis was judged based on the changes in mitochondrial DNA copy number (mtDNA), the content of the electron transport chain (ETC) proteins and PGC-1α in the MG...
2018: PloS One
https://www.readbyqxmd.com/read/29671055/a-new-perspective-of-the-hippocampus-in-the-origin-of-exercise-brain-interactions
#10
REVIEW
Catarina Rendeiro, Justin S Rhodes
Exercising regularly is a highly effective strategy for maintaining cognitive health throughout the lifespan. Over the last 20 years, many molecular, physiological and structural changes have been documented in response to aerobic exercise training in humans and animals, particularly in the hippocampus. However, how exercise produces such neurological changes remains elusive. A recent line of investigation has suggested that muscle-derived circulating factors cross into the brain and may be the key agents driving enhancement in synaptic plasticity and hippocampal neurogenesis from aerobic exercise...
April 18, 2018: Brain Structure & Function
https://www.readbyqxmd.com/read/29670901/relationship-between-joint-position-sense-force-sense-and-muscle-strength-and-the-impact-of-gymnastic-training-on-proprioception
#11
Bartłomiej Niespodziński, Andrzej Kochanowicz, Jan Mieszkowski, Elżbieta Piskorska, Małgorzata Żychowska
The aims of this study were (1) to assess the relationship between joint position (JPS) and force sense (FS) and muscle strength (MS) and (2) to evaluate the impact of long-term gymnastic training on particular proprioception aspects and their correlations. 17 elite adult gymnasts and 24 untrained, matched controls performed an active reproduction (AR) and passive reproduction (PR) task and a force reproduction (FR) task at the elbow joint. Intergroup differences and the relationship between JPS, FS, and MS were evaluated...
2018: BioMed Research International
https://www.readbyqxmd.com/read/29668382/the-cross-education-of-strength-and-skill-following-unilateral-strength-training-in-the-upper-and-lower-limbs
#12
Lara A Green, David A Gabriel
Cross education is the strength gain or skill improvement transferred to the contralateral limb following unilateral training or practice. The present study examined the transfer of both strength and skill following a strength training program. Forty participants (20M, 20F) completed a 6-week unilateral training program of dominant wrist flexion or dorsiflexion. Strength, force variability, and muscle activity were assessed pre-training, post-training, and following 6-weeks of detraining (retention). Analyses of covariance compared the experimental limb (trained or untrained) to the control (dominant or non-dominant)...
April 18, 2018: Journal of Neurophysiology
https://www.readbyqxmd.com/read/29668374/evidence-based-occupational-hearing-screening-ii-validation-of-a-screening-methodology-using-measures-of-functional-hearing-ability
#13
Sigfrid D Soli, Akiko Amano-Kusumoto, Odile Clavier, Jed Wilbur, Kristen Casto, Daniel Freed, Chantal Laroche, Véronique Vaillancourt, Christian Giguère, Wouter A Dreschler, Koenraad S Rhebergen
OBJECTIVE: Validate use of the Extended Speech Intelligibility Index (ESII) for prediction of speech intelligibility in non-stationary real-world noise environments. Define a means of using these predictions for objective occupational hearing screening for hearing-critical public safety and law enforcement jobs. DESIGN: Analyses of predicted and measured speech intelligibility in recordings of real-world noise environments were performed in two studies using speech recognition thresholds (SRTs) and intelligibility measures...
May 2018: International Journal of Audiology
https://www.readbyqxmd.com/read/29667375/core-curriculum-to-facilitate-the-expansion-of-a-rheumatology-practice-to-include-nurse-practitioners-and-physician-assistants
#14
Benjamin J Smith, Marcy B Bolster, Barbara Slusher, Christine Stamatos, Jeanne R Scott, Heather Benham, Salahuddin Kazi, Elizabeth A Schlenk, Daniel E Schaffer, Vikas Majithia, Calvin R Brown, Joan M von Feldt, Joseph Flood, David M Haag, Karen L Smarr
OBJECTIVE: Due to an aging population, increasing prevalence of rheumatic disease, and a growing supply and demand gap of rheumatology providers, innovative solutions are needed to meet the needs of persons with rheumatic conditions. Nurse practitioners (NPs) and physician assistants (PAs) have been identified as a group of health professionals who could help address the workforce shortage. The Executive Committee of the Association of Rheumatology Health Professionals (ARHP), a division of the American College of Rheumatology (ACR), charged a task force to facilitate the preparation of NPs/PAs to work in a rheumatology practice setting...
April 17, 2018: Arthritis Care & Research
https://www.readbyqxmd.com/read/29662906/quantitative-relationships-between-pulmonary-function-and-residual-neuromuscular-blockade
#15
ShuYing Fu, WenDong Lin, XiNing Zhao, ShengJin Ge, ZhangGang Xue
Background: Neuromuscular blockade is a risk factor for postoperative respiratory weakness during the immediate postoperative period. The quantitative relationships between postoperative pulmonary-function impairment and residual neuromuscular blockade are unknown. Methods: 113 patients who underwent elective laparoscopic cholecystectomy were enrolled in this study. They all had a pulmonary-function test (PFT) during the preoperative evaluation. Predictive values based on demographic data were also recorded...
2018: BioMed Research International
https://www.readbyqxmd.com/read/29660953/whole-body-vibration-improves-ankle-spasticity-balance-and-walking-ability-in-individuals-with-incomplete-cervical-spinal-cord-injury
#16
Taesung In, Kyoungsim Jung, Mingoo Lee, Hwi-Young Cho
OBJECTIVES: This study aimed to investigate the effects of whole-body vibration (WBV) training on ankle spasticity, balance, and walking ability in patients with incomplete spinal cord injury (iSCI) at cervical level. METHODS: Twenty-eight patients with cervical iSCI were randomly assigned to WBV (n = 14) or control group (n = 14). WBV group received WBV training, while control group was treated with placebo-treatment. All interventions were given for 20-min, twice a day, 5-days a week for 8-weeks...
April 7, 2018: NeuroRehabilitation
https://www.readbyqxmd.com/read/29660947/effects-of-walkbot-gait-training-on-kinematics-kinetics-and-clinical-gait-function-in-paraplegia-and-quadriplegia
#17
Jongseok Hwang, Yongil Shin, Ji-Ho Park, Young Joo Cha, Joshua Sung H You
BACKGROUND: The robotic-assisted gait training (RAGT) system has gained recognition as an innovative, effective paradigm to improve functional ambulation and activities of daily living in spinal cord injury and stroke. However, the effects of the Walkbot robotic-assisted gait training system with a specialized hip-knee-ankle actuator have never been examined in the paraplegia and quadriplegia population. OBJECTIVE: The aim of this study was to determine the long-term effects of Walkbot training on clinical for hips and knee stiffness in individuals with paraplegia or quadriplegia...
April 7, 2018: NeuroRehabilitation
https://www.readbyqxmd.com/read/29658804/comparison-of-effects-of-endurance-and-strength-training-programs-in-patients-with-copd
#18
Michael J Berry, Katherine L Sheilds, Norman E Adair
Comparisons between endurance and strength training in chronic obstructive pulmonary disease (COPD) patients have produced equivocal findings when examining physical function and health-related quality of life (HRQL). One reason for these differences may be due to individual patient responses to the different training modalities. PURPOSE: To compare changes in physical function and HRQL in a group of COPD patients completing both an endurance and a strength training program. METHODS: Eleven mildly diseased patients completed a three month endurance training program and, approximately 5 years later, completed a three month strength training program...
April 16, 2018: COPD
https://www.readbyqxmd.com/read/29652760/influence-of-disease-severity-and-exercise-limitation-on-exercise-training-intensity-and-load-and-health-benefits-from-pulmonary-rehabilitation-in-patients-with-copd-an-exploratory-study
#19
Virginia C Huynh, Desi P Fuhr, Bradley W Byers, Anne-Marie Selzler, Linn E Moore, Michael K Stickland
PURPOSE: Some patients with chronic obstructive pulmonary disease (COPD) fail to achieve health benefits with pulmonary rehabilitation (PR). Exercise intensity and load represent stimulus for adaptation but it is unclear whether inappropriate exercise intensity and/or load are affected by severity of COPD, which may affect health benefits. The purpose was to determine whether COPD severity and/or the severity of pulmonary limitation to exercise (PLE) impacted exercising intensity or load and whether resultant intensity/load affected health outcomes derived from PR...
April 11, 2018: Journal of Cardiopulmonary Rehabilitation and Prevention
https://www.readbyqxmd.com/read/29650412/theoretical-considerations-for-muscle-energy-savings-during-distance-running
#20
Jared R Fletcher, Brian R MacIntosh
We have recently demonstrated that the triceps surae muscles energy cost (ECTS ) represents a substantial portion of the total metabolic cost of running (Erun ). Therefore, it seems relevant to evaluate the factors which dictate ECTS , namely the amount and velocity of shortening, since it is likely these factors will dictate Erun . Erun and triceps surae morphological and AT mechanical properties were obtained in 46 trained and elite male and female distance runners using ultrasonography and dynamometry. ECTS (J·stride-1 ) at the speed of lactate threshold (sLT) was estimated from AT force and crossbridge mechanics and energetics...
March 27, 2018: Journal of Biomechanics
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