This paper reports on a novel approach to using a 3-axis accelerometer to capture body segment angle for upper limb functional electrical stimulation (FES) control. The approach calculates the angle between the accelerometer x-axis and the gravity vector, while avoiding poor sensitivity at certain angles and minimizing errors when true acceleration is relatively large in comparison to gravity. This approach was incorporated into a state-machine controller which is used for the real-time control of FES during upper limb functional task performance. An experimental approach was used to validate the new method. Two participants with different upper limb impairments resulting from a stroke carried out four different FES-assisted tasks. Comparisons were made between angle calculated from arm-mounted accelerometer data using our algorithm and angle calculated from limb-mounted reflective marker data. After removal of coordinate misalignment error, mean error across tasks and subjects ranged between 1.4 and 2.9°. The approach shows promise for use in the control of upper limb FES and other human movement applications where true acceleration is relatively small in comparison with gravity.
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http://dx.doi.org/10.1016/j.medengphy.2016.06.005 | DOI Listing |
Arch Orthop Trauma Surg
January 2025
BG Klinikum Unfallkrankenhaus Berlin, Department of Hand-, Replantation- and Microsurgery and Chair of Hand-, Replantation- and Microsurgery, Charité Universitätsmedizin Berlin, Berlin, Germany.
Introduction: Rhizarthrosis, or osteoarthritis of the trapeziometacarpal joint, predominantly affects women over 50, with up to 30% experiencing some degree of arthritis in this joint. Traditional surgical approaches, such as trapeziectomy with ligament reconstruction, can result in some patients in persistent pain or limited functionality. TMC ball-in-socket arthroplasty, with a cup placed in the distal scaphoid, offers a promising alternative to traditional arthrodesis or resection-suspension arthroplasty.
View Article and Find Full Text PDFArch Orthop Trauma Surg
January 2025
Department of Orthopaedics and Traumatology, Second Faculty of Medicine, Charles University in Prague and University Hospital Motol, Prague, Czech Republic.
Purpose Of The Study: Rhizarthrosis-osteoarthritis of the thumb carpometacarpal (CMC) joint is usually a primary idiopathic disease. Total joint arthroplasty (TJA) is one of the surgical treatment options for symptomatic advanced thumb CMC arthritis. This retrospective study aims to evaluate the mid-term functional and radiological results of TJA with the minimum follow-up period of 3 years after the surgery.
View Article and Find Full Text PDFExp Brain Res
January 2025
Center of Advanced Technologies in Rehabilitation, Sheba Medical Center, Ramat Gan, Israel.
Hand(s)-tapping tasks have been extensively studied in order to characterize the features of sensorimotor synchronization (SMS). These tasks frequently require participants to synchronize their tapping pace to an external, metronome-like sound. The impact of ageing on SMS abilities remains mainly unexplored.
View Article and Find Full Text PDFVascular
January 2025
Department of Vascular Surgery, Miller Family Heart Vascular and Thoracic Institute, Cleveland Clinic, Cleveland, OH, USA.
Objective: Superior vena cava syndrome (SVC) is a debilitating disease, and surgical reconstruction has been described with some of the best results using spiral great saphenous vein (SGSV) grafts. SGSV grafts can be difficult to construct, and a long segment of saphenous vein is needed. Femoral vein has been an excellent conduit for infected aortic and peripheral reconstructions in our hands, and we sought to review outcomes using this conduit for SVC reconstruction.
View Article and Find Full Text PDFWearable Technol
December 2024
Department of Mechanical Engineering, Vanderbilt University, Nashville, TN, USA.
This work studies upper-limb impairment resulting from stroke or traumatic brain injury and presents a simple technological solution for a subset of patients: a soft, active stretching aid for at-home use. To better understand the issues associated with existing associated rehabilitation devices, customer discovery conversations were conducted with 153 people in the healthcare ecosystem (60 patients, 30 caregivers, and 63 medical providers). These patients fell into two populations: spastic (stiff, clenched hands) and flaccid (limp hands).
View Article and Find Full Text PDFEnter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!