Restoration of elbow extension via functional electrical stimulation in individuals with tetraplegia

Memberg, William D.; Crago, P.E.; Keith, Michael W.

doi:10.1682/jrrd.2003.11.0477

Cited by 35 publications

(27 citation statements)

References 29 publications

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“…Many previous external orthoses have been conspicuous, cumbersome and difficult to don and doff, reducing uptake in the population they intend to help. Memberg et al [4] report that none of the subjects in their study to restore elbow extension via FES was willing to add an accelerometer to their arm as an input signal to assist with automation of the FES control of their triceps, as they did not want to don an additional device and cable on their arm. Patients preferred a simple, less flexible triceps controller, because those external components were lighter, less visible and less bulky.…”

Section: Measuring and Controlling Tremormentioning

confidence: 99%

Measuring and modelling arm dynamics to support studies into reducing tremor in individuals with multiple sclerosis

Ketteringham¹,

Neild²,

Hyde³

et al. 2007

Modelling in Medicine and Biology VII

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This paper reports on work carried out to date, and future directions for, a project that intends to measure and control tremor in individuals with multiple sclerosis (MS). The project will use computer modelling to simulate the movements involved in upper limb intention tremor, as exhibited by individuals with MS.The models will be incorporated into a final system that will interpret measurements from sets of microelectromechanical systems (MEMS) sensors positioned over the surfaces of the upper limb to provide position, orientation and movement information. These data will be combined with gross muscle activity data, extracted from surface electromyogram (EMG) measurements, to create a fully dynamic model of the arm movements in real time. This model will be used to develop methods of attenuating the tremor, firstly at the elbow joint, without adversely affecting the underlying intended movement, by providing real-time feedback control of appropriate force input devices. The estimates of movement and the forces involved will also provide clinicians with a useful tool in the quantification of upper limb tremor.

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Section: Measuring and Controlling Tremormentioning

confidence: 99%

Measuring and modelling arm dynamics to support studies into reducing tremor in individuals with multiple sclerosis

Ketteringham¹,

Neild²,

Hyde³

et al. 2007

Modelling in Medicine and Biology VII

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“…Study has shown that the addition of a triceps muscle electrode to the neuroprosthetic hand grasps can increase arm extension and controllable workspace. 123 Since 1999, the use of cortical signals to control neuroprosthetic devices for patients with paralysis has been investigated. A miniaturized neuroprosthesis is under development that will be suitable for implantation into the brain.…”

Section: Spinal Cord Injury and Other Paralytic Disordersmentioning

confidence: 99%

Braving New Worlds: To Conquer, to Endure

Moffat

2004

Physical Therapy

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Marilyn Moffat, PT, PhD, FAPTA, CSCS Dr Moffat has had a tremendous impact on the physical therapy profession as a visionary leader, a distinguished educator, and an accomplished clinician, administrator, and researcher. She has served as editor of Physical Therapy and, as an elected member of APTA's House of Delegates, has been instrumental in providing direction for the future of the profession. She has served as a member of innumerable committees, task forces, and boards of directors at every level within the Association. In 1991, she was elected President of APTA for the first of 2 consecutive terms. As President, Dr Moffat spearheaded the development of the Association's Guide to Physical Therapist Practice, and she later served as a project editor of the Guide's second edition and was heavily involved in the development of the Interactive Guide on CD-ROM. Dr Moffat has worked tirelessly since 1977, when she first spoke about the professional doctoral degree for physical therapists, to lead the profession through a process of redefining the role of the physical therapist for the future and ensuring that the highest level of practice would be achieved as a requisite for assuming the title “Doctor of Physical Therapy.” As a delegate to the World Confederation for Physical Therapy, Dr Moffat has provided leadership to the international community of physical therapists. She served as APTA's voting delegate to the WCPT General Meeting, on the Executive Committee of the WCPT as the North America/Caribbean Region representative, and as a member of the Task Force on the International Definition of Physical Therapy. Dr Moffat has given more than 800 professional presentations worldwide and has taught and consulted in Taiwan, Thailand, Burma, Puerto Rico, Vietnam, Hong Kong, and Wuhan in China. For her demonstrated worldwide leadership in physical therapy, she was honored with WCPT's Mildred Elson Award for International Leadership in Physical Therapy. Dr Moffat has been the recipient of many APTA honors and awards. She has been recognized with APTA's Lucy Blair Service Award and as a Catherine Worthingham Fellow. She has received 2 diversity awards from the Advisory Panel on Minority Affairs, the R Charles Harker Policy Maker Award from APTA's Health Policy and Administration Section, and the Robert Dicus Outstanding Service Award from APTA's Private Practice Section. The most significant acknowledgments of her lifelong commitment to service are the New York Chapter's Dr Marilyn Moffat Distinguished Service Award and APTA's newly created Marilyn Moffat Leadership Award.

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“…Upper extremity (UE) FES applications of feedback control have included shoulder function (Yu et al, 2001), elbow extension (Giuffrida and Crago, 2001; Memberg et al, 2003), hand grasp (Kilgore et al, 1989), and wrist stabilization (Lemay and Crago, 1997). …”

Section: Introductionmentioning

confidence: 99%

An optimized proportional-derivative controller for the human upper extremity with gravity

Jagodnik

Blana

Bogert

et al. 2015

Journal of Biomechanics

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When Functional Electrical Stimulation (FES) is used to restore movement in subjects with spinal cord injury (SCI), muscle stimulation patterns should be selected to generate accurate and efficient movements. Ideally, the controller for such a neuroprosthesis will have the simplest architecture possible, to facilitate translation into a clinical setting. In this study, we used the simulated annealing algorithm to optimize two proportional-derivative (PD) feedback controller gain sets for a 3-dimensional arm model that includes musculoskeletal dynamics and has 5 degrees of freedom and 22 muscles, performing goal-oriented reaching movements. Controller gains were optimized by minimizing a weighted sum of position errors, orientation errors, and muscle activations. After optimization, gain performance was evaluated on the basis of accuracy and efficiency of reaching movements, along with three other benchmark gain sets not optimized for our system, on a large set of dynamic reaching movements for which the controllers had not been optimized, to test ability to generalize. Robustness in the presence of weakened muscles was also tested. The two optimized gain sets were found to have very similar performance to each other on all metrics, and to exhibit significantly better accuracy, compared with the three standard gain sets. All gain sets investigated used physiologically acceptable amounts of muscular activation. It was concluded that optimization can yield significant improvements in controller performance while still maintaining muscular efficiency, and that optimization should be considered as a strategy for future neuroprosthesis controller design.

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Restoration of elbow extension via functional electrical stimulation in individuals with tetraplegia

Cited by 35 publications

References 29 publications

Measuring and modelling arm dynamics to support studies into reducing tremor in individuals with multiple sclerosis

Measuring and modelling arm dynamics to support studies into reducing tremor in individuals with multiple sclerosis

Braving New Worlds: To Conquer, to Endure

An optimized proportional-derivative controller for the human upper extremity with gravity

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