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The Effect Of Instruction And Hand Dominance On Grip Force Coordination In Manipulation Tasks
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Book Synopsis The Effect of Instruction and Hand Dominance on Grip Force Coordination in Manipulation Tasks by : Xin Jin
Download or read book The Effect of Instruction and Hand Dominance on Grip Force Coordination in Manipulation Tasks written by Xin Jin and published by . This book was released on 2011 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The ability to grasp and hold an object is not only one of the most common daily activities but also essential for living an independent life. According to a simple prehension model, the force applied upon a vertically oriented hand-held object could be decomposed into two distinctive but highly coordinated components: the grip force (GF; the component perpendicular to the hand-object contact area that provides friction) and the load force (LF; the component parallel to the hand-object contact area that can either move the object or support of the body). The GF-LF coordination could be affected by a number of factors that still remain underexplored. The aim of this study is to investigate the effect of instructions and hand dominance on the relationship of GF and LF. Sixteen right-handed participants were tested on a custom designed instrumented device. They performed bimanual manipulation tasks under different instructions and mechanical conditions. The exerted GF and LF were recorded and analyzed. Indices of GF scaling, GF-LG coupling and GF modulation were calculated separately for the dominant and non-dominant hand. The result showed that the instruction of "pull" leads to higher GF-LF coordination than the instruction of "hold", as seen by a lower GF/LF ratio, higher GF-LF coupling, and higher GF modulation. The only effect of hand dominance was a more prominent time-lag of GF of the non-dominant hand. Overall, the observed findings suggest that the instructions could play an important role in GF-LF coordination, and, therefore, they should be taken into account when either studying hand manipulation activities in healthy individuals or testing hand function in various patient populations.
Book Synopsis Hand Force and Arm Movement Coordination in Static and Dynamic Manipulation Tasks by : Daniela Herrera
Download or read book Hand Force and Arm Movement Coordination in Static and Dynamic Manipulation Tasks written by Daniela Herrera and published by . This book was released on 2020 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: To be able to interact with the variety of objects an individual encounter[s] every day, he or she must know how to manipulate those objects. In simple object manipulation, such as the action of drinking a cup of water, the hand force and movement is controlled by the central nervous system (CNS) to regulate the amount of grip force the hand must exert to hold the object without slipping or breaking the cup. However, neurological diseases, such as multiple sclerosis and Parkinson’s, affect the function of the CNS causing individuals to lose control of their muscle activation and coordination. There is an extensive set of research dedicated towards investigating the coordination between grip and load force of the hands for a variety of manipulation tasks. However, there is a gap in current research in understanding the relationship between the human hand and the forearm or upper arm movement during object manipulation.
Book Synopsis Force Coordination in Object Manipulation by : Paulo Barbosa de Freitas
Download or read book Force Coordination in Object Manipulation written by Paulo Barbosa de Freitas and published by . This book was released on 2009 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Hand function is essential for performing activities of daily living. It crucially depends on the ability to control forces exerted upon the hand-held objects. According to a simple mechanical model, the normal component of the interaction force (i.e., grip force; GF) has to be sufficient to prevent slippage caused by the tangential component (load force; LF). A sufficient but not excessive safety margin (i.e., a 'surplus' of GF above the minimum required) is achieved by an elaborate coordination of muscles exerting GF and LF. We compared GF-LF coordination in various manipulation tasks when LF was exerted in one and two directions, as well as when the tasks were performed by applying various grasping techniques. The findings of the first two studies suggest that two distinct GF-LF coordination strategies are employed when uni- and bidirectional manipulation tasks are performed (i.e., the indices of GF-LF coordination were remarkably higher in uni- than in the bidirectional tasks). The switch between the strategies may be triggered by changes in the afferent sensory activity of the skin mechanoreceptors, rather than by switching among different muscles synergies. The following three studies suggest that the hand segments and their respective skin areas non-specialized for object manipulation could provide similar indices of GF-LF coordination as the specialized ones. However, the differences in skin friction (lower in non-specialized than in the specialized skin areas) seem not to be fully accounted for by the neural controller, as they are accounted for when the same grasp is applied to manipulate objects of different physical properties. Overall, the main findings suggest that the changes in LF direction need to be taken into account both in future research of human grasping and in the routine testing of hand function in clinical populations. In addition, our research suggests that the differences in skin friction need to be taken into account in future research of manipulation activities.
Book Synopsis Characterizing the Coordination of Grasp and Twist in Neurologically Normal and Post-stroke Individuals by : Hamed Kazemi
Download or read book Characterizing the Coordination of Grasp and Twist in Neurologically Normal and Post-stroke Individuals written by Hamed Kazemi and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: "We take for granted the ease with which we use our hands to perform many activities including grasping and twisting using forearm rotation. All of these normal hand actions can be disrupted following damage to the brain due to stroke or traumatic injury.This thesis presents a series of studies exploring how post-stroke subjects and healthy, age-matched subjects coordinate grip force with wrist torque when twisting an object using forearm supination/pronation.To obtain a comprehensive picture of how healthy subjects control grip force I performed a series of experiments under various conditions. Using a robotic interface that we developed for rehabilitation and assessment of hand function, I studied grasp and twist by systematically varying task parameters which included elastic resistance, movement direction, hand dominance, size of grip aperture, grip configuration and speed of rotation. When comparing the temporal/amplitude relationship between grip force and load torque across different task conditions, I found a large degree of similarity, indicating that regardless of how the twisting task is performed there is a similar control structure. Healthy individuals modulated grip force in an approximately linear fashion with load under all conditions tested. In addition, the normal force exerted by the thumb and that exerted by the other fingers were highly correlated. The coordination of grasp and twist did not change with hand dominance or with grip configuration. However, the control of grip force changed with the speed of rotation. The parallel coupling between grip force and load was reduced for the fastest rotations. In addition, small differences were found in the correlation between grip force and load torque for supination over pronation.Results of the study with chronic post-stroke subjects showed that the coordination of grasp and twist was frequently impaired in both the contralesional and ipsilesional hands. This was reflected by a lower correlation between grip force and load torque and between thumb force and finger force than in healthy subjects. In addition, the movements were significantly less smooth and movement time was prolonged using either the ipsilesional or contralesional hand compared to healthy subjects. Overall, use of excessive grip force was not prevalent post-stroke and only a minority of post-stroke subjects used significantly greater grip force to perform the task than healthy subjects. The results provide evidence that the coordination of grasp and twist is frequently impaired bilaterally following unilateral stroke. Not only did the contralesional hand exhibit impairment, but in several cases the ipsilesional hand, often referred to as the "unaffected" hand, also showed profound impairment. This detailed analysis of the kinetics and kinematics of a twisting task provides an objective, quantitative means to characterize grip coordination following stroke and may have implications in developing new strategies for training grip coordination." --
Book Synopsis The Effect of Hand Dominance on Manual Arm Strength by : Fahima Wakeely
Download or read book The Effect of Hand Dominance on Manual Arm Strength written by Fahima Wakeely and published by . This book was released on 2021 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the design of manual work tasks, considering task demands in the context of human strength capability has been vital to assessing workplace musculoskeletal injury risk. This is particularly true for the upper extremities, which are often relied upon to produce manual forces in most occupational manufacturing tasks. Despite workers commonly utilizing both limbs in the workplace, the effect of hand dominance on any type of upper extremity strength is relatively underexplored. In several ergonomics models of strength capacity, the non-dominant hand is assumed to be approximately 10% weaker than the dominant hand, but this heuristic is primarily based on grip strength data and does not account for potential differences between handedness (i.e. left- vs right-handers) and sex (males vs females). As such, the purpose of this research is to examine how manual arm strength differs between the dominant and non-dominant limbs in a sample of right and left-handed males and females.
Book Synopsis Sensorimotor Control of Grasping by : Dennis A. Nowak
Download or read book Sensorimotor Control of Grasping written by Dennis A. Nowak and published by Cambridge University Press. This book was released on 2009-06-25 with total page 537 pages. Available in PDF, EPUB and Kindle. Book excerpt: Provides a contemporary summary of the physiology and pathophysiology of the manipulative and exploratory functions of the human hand.
Book Synopsis Mosby's Q & A Review for the Occupational Therapy Board Examination - E-Book by : Patricia Bowyer
Download or read book Mosby's Q & A Review for the Occupational Therapy Board Examination - E-Book written by Patricia Bowyer and published by Elsevier Health Sciences. This book was released on 2007-03-27 with total page 336 pages. Available in PDF, EPUB and Kindle. Book excerpt: Questions focus on the Occupational Therapy Practice Framework (OTPF) as well as the results from the practice analysis completed by NBCOT. Questions cross the spectrum of occupational therapy process - evaluation, intervention planning, intervention, service management, and outcomes of a variety of populations including pediatric, mental health, and adult physical and neurological conditions. Practice environments such as the community, school-based and hospital based care are covered throughout. Specific references for every question and a comprehensive list of resources are provided at the end of the book for further study. Rationales for answer options are provided to explain why the correct answer is right and the other choices are wrong. Provides information on the format of the NBCOT exam and tips for studying and answering test questions.
Download or read book Cumulated Index Medicus written by and published by . This book was released on 1993 with total page 1488 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Musculoskeletal Disorders and the Workplace by : Institute of Medicine
Download or read book Musculoskeletal Disorders and the Workplace written by Institute of Medicine and published by National Academies Press. This book was released on 2001-05-24 with total page 510 pages. Available in PDF, EPUB and Kindle. Book excerpt: Every year workers' low-back, hand, and arm problems lead to time away from jobs and reduce the nation's economic productivity. The connection of these problems to workplace activities-from carrying boxes to lifting patients to pounding computer keyboards-is the subject of major disagreements among workers, employers, advocacy groups, and researchers. Musculoskeletal Disorders and the Workplace examines the scientific basis for connecting musculoskeletal disorders with the workplace, considering people, job tasks, and work environments. A multidisciplinary panel draws conclusions about the likelihood of causal links and the effectiveness of various intervention strategies. The panel also offers recommendations for what actions can be considered on the basis of current information and for closing information gaps. This book presents the latest information on the prevalence, incidence, and costs of musculoskeletal disorders and identifies factors that influence injury reporting. It reviews the broad scope of evidence: epidemiological studies of physical and psychosocial variables, basic biology, biomechanics, and physical and behavioral responses to stress. Given the magnitude of the problem-approximately 1 million people miss some work each year-and the current trends in workplace practices, this volume will be a must for advocates for workplace health, policy makers, employers, employees, medical professionals, engineers, lawyers, and labor officials.
Book Synopsis Canadian Journal of Physiology and Pharmacology by :
Download or read book Canadian Journal of Physiology and Pharmacology written by and published by . This book was released on 2004 with total page 668 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Quantitative Examination of Neurologic Functions by : Alfred R. Potvin
Download or read book Quantitative Examination of Neurologic Functions written by Alfred R. Potvin and published by . This book was released on 1985 with total page 280 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Cognitive Neuroscience of Action by : Marc Jeannerod
Download or read book The Cognitive Neuroscience of Action written by Marc Jeannerod and published by Wiley-Blackwell. This book was released on 1997-03-06 with total page 252 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is one of the first in an exciting new series of tutorials in cognitive neuroscience, and provides a concise, readable and up-to-date review of cognitive and neuroscience studies of the representations for actions. The fundamental question addressed concerns the nature and role of different representations in the planning and execution of movements.
Download or read book Cerebral Palsy written by Freeman Miller and published by JHU Press. This book was released on 2006-05-08 with total page 537 pages. Available in PDF, EPUB and Kindle. Book excerpt: When a child has a health problem, parents want answers. But when a child has cerebral palsy, the answers don't come quickly. A diagnosis of this complex group of chronic conditions affecting movement and coordination is difficult to make and is typically delayed until the child is eighteen months old. Although the condition may be mild or severe, even general predictions about long-term prognosis seldom come before the child's second birthday. Written by a team of experts associated with the Cerebral Palsy Program at the Alfred I. duPont Hospital for Children, this authoritative resource provides parents and families with vital information that can help them cope with uncertainty. Thoroughly updated and revised to incorporate the latest medical advances, the second edition is a comprehensive guide to cerebral palsy. The book is organized into three parts. In the first, the authors describe specific patterns of involvement (hemiplegia, diplegia, quadriplegia), explain the medical and psychosocial implications of these conditions, and tell parents how to be effective advocates for their child. In the second part, the authors provide a wealth of practical advice about caregiving from nutrition to mobility. Part three features an extensive alphabetically arranged encyclopedia that defines and describes medical terms and diagnoses, medical and surgical procedures, and orthopedic and other assistive devices. Also included are lists of resources and recommended reading.
Download or read book Motor Cognition written by Marc Jeannerod and published by Oxford University Press. This book was released on 2006-06-29 with total page 220 pages. Available in PDF, EPUB and Kindle. Book excerpt: Our ability to acknowledge and recognize our own identity -- our "self" -- is a characteristic doubtless unique to humans. Where does this feeling come from? How does the combination of neurophysiological processes coupled with our interaction with the outside world construct this coherent identity? We know that our social interactions contribute via the eyes, ears, etc. However, our self is not only influenced by our senses. It is also influenced by the actions we perform and those we see others perform. Our brain anticipates the effects of our own actions and simulates the actions of others. In this way, we become able to understand ourselves and to understand the actions and emotions of others. This book describes the new field of "Motor Cognition". Though motor actions have long been studied by neuroscientists and physiologists, it is only recently that scientists have considered the role of actions in building the self. How consciousness of action is part of self-consciousness, how one's own actions determine the sense of being an agent, how actions performed by others impact on ourselves for understanding others, differentiating ourselves from them and learning from them: these questions are raised and discussed throughout the book, drawing on experimental, clinical, and theoretical bases. The advent of new neuroscience techniques, such as neuroimaging and direct electrical brain stimulation, together with a renewal of behavioral methods in cognitive psychology, provide new insights into this area. Mental imagery of action, self-recognition, consciousness of actions, imitation can be objectively studied using these new tools. The results of these investigations shed light on clinical disorders in neurology, psychiatry, and in neuro-development.
Book Synopsis A Multidisciplinary Approach to Motor Learning and Sensorimotor Adaptation by : Rachael D Seidler
Download or read book A Multidisciplinary Approach to Motor Learning and Sensorimotor Adaptation written by Rachael D Seidler and published by Frontiers Media SA. This book was released on 2015-04-22 with total page 215 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nothing provided
Book Synopsis QUANTITATIVE EXAMINATION OF NEUROLOGIC FUNCTIONS by : Potvin
Download or read book QUANTITATIVE EXAMINATION OF NEUROLOGIC FUNCTIONS written by Potvin and published by Springer. This book was released on 1985-01-08 with total page 280 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Occupational Therapy for Children and Adolescents - E-Book by : Jane Case-Smith
Download or read book Occupational Therapy for Children and Adolescents - E-Book written by Jane Case-Smith and published by Elsevier Health Sciences. This book was released on 2014-10-27 with total page 904 pages. Available in PDF, EPUB and Kindle. Book excerpt: Focusing on children from infancy to adolescence, Occupational Therapy for Children and Adolescents, 7th Edition provides comprehensive, full-color coverage of pediatric conditions and treatment techniques in all settings. Its emphasis on evidence-based practice includes updated references, research notes, and explanations of the evidentiary basis for specific interventions. And coverage of new research and theories, new techniques, and current trends, with additional case studies, keeps you in step with the latest advances in pediatric OT practice. Written by educators Jane Case-Smith and Jane Clifford O’Brien, this text is the Number One book in pediatric OT! Case studies help you apply concepts to actual situations you may encounter in practice. Research Notes boxes and evidence-based summary tables help you interpret evidence and strengthen your clinical decision-making skills. Learning resources on Evolve include video clips, review activities, and additional case studies. Learning objectives indicate what you will be learning in each chapter and serve as checkpoints in studying for examinations. A glossary makes it easy to look up key terms. NEW video clips and case studies on the Evolve website demonstrate important concepts and rehabilitation techniques. NEW Autism Spectrum Disorder chapter contains important information for OTs not addressed in other texts. NEW Neuromotor: Cerebral Palsy chapter addresses the most prevalent cause of motor dysfunction in children. NEW Adolescent Development chapter helps you manage the special needs of teenagers and young adults. NEW contemporary design includes full-color photos and illustrations. UPDATED content and references ensure you have access to the comprehensive, research-based information that will guide you in making optimal decisions in practice.
