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https://www.readbyqxmd.com/read/28820651/starting-and-stopping-kinetics-of-a-rear-mounted-power-assist-for-manual-wheelchairs
#1
Stephanie Wong, Ben Mortenson, Bonita Sawatzky
A rear mounted, powered, drive wheel has been developed to assist with mobility for manual wheelchairs in indoor and outdoor modes. To start the wheel, users must initiate handrim propulsion with sufficient force to trigger the motor. To stop the indoor mode, users must apply a braking force through the handrims exceeding the device's deceleration threshold. The objectives of this study were to compare 1) the minimum force required to start a wheelchair with and without the wheel, and 2) the distances and forces needed to stop a wheelchair at different treadmill speeds (3...
August 18, 2017: Assistive Technology: the Official Journal of RESNA
https://www.readbyqxmd.com/read/28818075/perspectives-of-basic-wheelchair-users-on-improving-their-access-to-wheelchair-services-in-kenya-and-philippines-a-qualitative-study
#2
Emma Williams, Elizabeth Hurwitz, Immaculate Obaga, Brenda Onguti, Adovich Rivera, Tyrone Reden L Sy, R Lee Kirby, Jamie Noon, Deepti Tanuku, Anthony Gichangi, Eva Bazant
BACKGROUND: The United Nations has called for countries to improve access to mobility devices when needed. The World Health Organization has published guidelines on the provision of manual wheelchairs in less-resourced settings. Yet little is known about the extent to which appropriate wheelchairs are available and provided according to international guidelines. This study's purpose was to describe wheelchair users' experiences receiving services and acquiring wheelchair skills in urban and peri-urban areas of Kenya and the Philippines...
August 17, 2017: BMC International Health and Human Rights
https://www.readbyqxmd.com/read/28814044/a-survey-of-stakeholder-perspectives-on-a-proposed-combined-exoskeleton-wheelchair-technology
#3
Tim Bhatnagar, W Ben Mortensen, Johanne Mattie, Jamie Wolff, Claire Parker, Jaimie Borisoff
BACKGROUND: Exoskeleton technology has potential benefits for wheelchair users' health and mobility. However, there are practical barriers to their everyday use as a mobility device. In particular, challenges related to travelling longer distances and transitioning between using a wheelchair and exoskeleton walking may present significant deterrents to regular exoskeleton use. In an effort to remove these barriers, a combined exoskeleton-wheelchair concept ('COMBO') has been proposed, which aims to achieve the benefits of both these mobility technologies...
July 2017: IEEE ... International Conference on Rehabilitation Robotics: [proceedings]
https://www.readbyqxmd.com/read/28814043/design-of-a-wearable-interface-for-lightweight-robotic-arm-for-people-with-mobility-impairments
#4
Tommaso Lisini Baldi, Giovanni Spagnoletti, Mihai Dragusanu, Domenico Prattichizzo
Many common activities of daily living like open a door or fill a glass of water, which most of us take for granted, could be an insuperable problem for people who have limited mobility or impairments. For years the unique alternative to overcame this limitation was asking for human help. Nowadays thanks to recent studies and technology developments, having an assistive devices to compensate the loss of mobility is becoming a real opportunity. Off-the-shelf assistive robotic manipulators have the capability to improve the life of people with motor impairments...
July 2017: IEEE ... International Conference on Rehabilitation Robotics: [proceedings]
https://www.readbyqxmd.com/read/28813969/prediction-of-user-preference-over-shared-control-paradigms-for-a-robotic-wheelchair
#5
Ahmetcan Erdogan, Brenna D Argall
The design of intelligent powered wheelchairs has traditionally focused heavily on providing effective and efficient navigation assistance. Significantly less attention has been given to the end-user's preference between different assistance paradigms. It is possible to include these subjective evaluations in the design process, for example by soliciting feedback in post-experiment questionnaires. However, constantly querying the user for feedback during real-world operation is not practical. In this paper, we present a model that correlates objective performance metrics and subjective evaluations of autonomous wheelchair control paradigms...
July 2017: IEEE ... International Conference on Rehabilitation Robotics: [proceedings]
https://www.readbyqxmd.com/read/28813965/cheap-or-robust-the-practical-realization-of-self-driving-wheelchair-technology
#6
Maya Burhanpurkar, Mathieu Labbe, Charlie Guan, Francois Michaud, Jonathan Kelly
To date, self-driving experimental wheelchair technologies have been either inexpensive or robust, but not both. Yet, in order to achieve real-world acceptance, both qualities are fundamentally essential. We present a unique approach to achieve inexpensive and robust autonomous and semi-autonomous assistive navigation for existing fielded wheelchairs, of which there are approximately 5 million units in Canada and United States alone. Our prototype wheelchair platform is capable of localization and mapping, as well as robust obstacle avoidance, using only a commodity RGB-D sensor and wheel odometry...
July 2017: IEEE ... International Conference on Rehabilitation Robotics: [proceedings]
https://www.readbyqxmd.com/read/28813964/brain-computer-interface-combining-eye-saccade-two-electrode-eeg-signals-and-voice-cues-to-improve-the-maneuverability-of-wheelchair
#7
Ker-Jiun Wang, Lan Zhang, Bo Luan, Hsiao-Wei Tung, Quanfeng Liu, Jiacheng Wei, Mingui Sun, Zhi-Hong Mao
Brain-computer interfaces (BCIs) largely augment human capabilities by translating brain wave signals into feasible commands to operate external devices. However, many issues face the development of BCIs such as the low classification accuracy of brain signals and the tedious human-learning procedures. To solve these problems, we propose to use signals associated with eye saccades and blinks to control a BCI interface. By extracting existing physiological eye signals, the user does not need to adapt his/her brain waves to the device...
July 2017: IEEE ... International Conference on Rehabilitation Robotics: [proceedings]
https://www.readbyqxmd.com/read/28813956/semi-autonomous-mobility-assistance-for-power-wheelchair-users-navigating-crowded-environments
#8
Daniel Ashley, Kyle Ashley, Redwan Alqasemi, Rajiv Dubey
Power wheelchair users suffering from cognitive or physical impairment often face difficulties in maneuvering their wheelchairs through crowded environments. Currently, users need to be continuously aware of all traffic around them to actively avoid all collisions. This is an especially difficult task since many wheelchair users are unable to accurately view or perceive their surroundings. Additionally, imprecise joystick control, slowed reaction time, or imperfect interpretation of the environment can lead to unintended collisions with objects in the environment...
July 2017: IEEE ... International Conference on Rehabilitation Robotics: [proceedings]
https://www.readbyqxmd.com/read/28813953/bridge-behavioural-reaching-interfaces-during-daily-antigravity-activities-through-upper-limb-exoskeleton-preliminary-results
#9
Marta Gandolla, Andrea Costa, Lorenzo Aquilante, Margit Gfoehler, Markus Puchinger, Francesco Braghin, Alessandra Pedrocchi
People with neuromuscular diseases such as muscular dystrophy experience a distributed and evolutive weakness in the whole body. Recent technological developments have changed the daily life of disabled people strongly improving the perceived quality of life, mostly concentrating on powered wheelchairs, so to assure autonomous mobility and respiratory assistance, essential for survival. The key concept of the BRIDGE project is to contrast the everyday experience of losing functions by providing them of a system able to exploit the best their own residual capabilities in arm movements so to keep them functional and autonomous as much as possible...
July 2017: IEEE ... International Conference on Rehabilitation Robotics: [proceedings]
https://www.readbyqxmd.com/read/28813951/design-of-an-immersive-simulator-for-assisted-power-wheelchair-driving
#10
Louise Devigne, Marie Babel, Florian Nouviale, Vishnu K Narayanan, Francois Pasteau, Philippe Gallien
Driving a power wheelchair is a difficult and complex visual-cognitive task. As a result, some people with visual and/or cognitive disabilities cannot access the benefits of a power wheelchair because their impairments prevent them from driving safely. In order to improve their access to mobility, we have previously designed a semi-autonomous assistive wheelchair system which progressively corrects the trajectory as the user manually drives the wheelchair and smoothly avoids obstacles. Developing and testing such systems for wheelchair driving assistance requires a significant amount of material resources and clinician time...
July 2017: IEEE ... International Conference on Rehabilitation Robotics: [proceedings]
https://www.readbyqxmd.com/read/28813945/towards-a-situation-and-user-aware-multi-modal-motorized-toilet-system-to-assist-older-adults-with-disabilities-a-user-requirements-study
#11
T Pilissy, A Toth, G Fazekas, A Sobjak, R Rosenthal, T Luftenegger, P Panek, P Mayer
In the recent decades state of the art technologies appeared in many areas to assist older adults with disabilities. However, one very essential activity of daily life, the toileting remained without any relevant development. The iToilet project of the European Union focuses on the development of an intelligent and motorized toilet system to enable independent toilet use for older adults with disabilities. To begin the development, the user requirements of end-users were assessed by means of focus group interviews and questionnaires...
July 2017: IEEE ... International Conference on Rehabilitation Robotics: [proceedings]
https://www.readbyqxmd.com/read/28813940/recording-gaze-trajectory-of-wheelchair-users-by-a-spherical-camera
#12
Shigang Li, Tatsuya Fujiura, Isao Nakanishi
Wheelchairs are widely used in the facilities of rehabilitation. In this paper, we propose a method of recording the gaze trajectory of wheelchair users by using a spherical camera mounted on the wheelchairs. A spherical camera has a full field of view and can observe the entire surrounding scenes. First, the gaze point of a user sitting on a wheelchair is estimated from the corneal reflection image observed by a wearable eye camera. Then, the gaze point is mapped onto the full-view image captured by the spherical camera via feature matching...
July 2017: IEEE ... International Conference on Rehabilitation Robotics: [proceedings]
https://www.readbyqxmd.com/read/28813924/probabilistic-vs-linear-blending-approaches-to-shared-control-for-wheelchair-driving
#13
Chinemelu Ezeh, Pete Trautman, Louise Devigne, Valentin Bureau, Marie Babel, Tom Carlson
Some people with severe mobility impairments are unable to operate powered wheelchairs reliably and effectively, using commercially available interfaces. This has sparked a body of research into "smart wheelchairs", which assist users to drive safely and create opportunities for them to use alternative interfaces. Various "shared control" techniques have been proposed to provide an appropriate level of assistance that is satisfactory and acceptable to the user. Most shared control techniques employ a traditional strategy called linear blending (LB), where the user's commands and wheelchair's autonomous commands are combined in some proportion...
July 2017: IEEE ... International Conference on Rehabilitation Robotics: [proceedings]
https://www.readbyqxmd.com/read/28813845/an-assistance-device-to-help-people-with-trunk-impairment-maintain-posture
#14
Tomoka Ogura, Taku Itami, Ken'ichi Yano, Ichidai Mori, Kazuhiro Kameda
People with trunk impairment cannot lean forward because of the dysfunction of the trunk resulting from events such as cervical cord injury (CCI). It is therefore difficult for such people to work at a table because they may easily fall from their wheelchair, and it is also hard for them to return to their original position. This limits the activities of daily living (ADLs) of people with trunk impairment. These problems can be solved to some extent with equipment such as a wheelchair belt or a spinal orthosis that can help the person to maintain his or her posture...
July 2017: IEEE ... International Conference on Rehabilitation Robotics: [proceedings]
https://www.readbyqxmd.com/read/28813815/how-do-strength-and-coordination-recovery-interact-after-stroke-a-computational-model-for-informing-robotic-training
#15
Sumner L Norman, Joan Lobo-Prat, David J Reinkensmeyer
Robotic devices can train strength, coordination, or a combination of both. If a robotic device focuses on coordination, what happens to strength recovery, and vice versa? Understanding this interaction could help optimize robotic training. We developed a computational neurorehabilitation model to gain insight into the interaction between strength and coordination recovery after stroke. In the model, the motor system recovers by optimizing the activity of residual corticospinal cells (focally connected, excitatory and inhibitory) and reticulospinal cells (diffusely connected and excitatory) to achieve a motor task...
July 2017: IEEE ... International Conference on Rehabilitation Robotics: [proceedings]
https://www.readbyqxmd.com/read/28813792/there-is-plenty-of-room-for-motor-learning-at-the-bottom-of-the-fugl-meyer-acquisition-of-a-novel-bimanual-wheelchair-skill-after-chronic-stroke-using-an-unmasking-technology
#16
Yasemin Sarigul-Klijn, Joan Lobo-Prat, Brendan W Smith, Sage Thayer, Daniel Zondervan, Vicky Chan, Oliver Stoller, David J Reinkensmeyer
Many people with a stroke have a severely paretic arm, and it is often assumed that they are unable to learn novel, skilled behaviors that incorporate use of that arm. Here, we show that a group of people with chronic stroke (n = 5, upper extremity Fugl-Meyer scores: 31, 30, 26, 22, 8) learned to use their impaired arm to propel a novel, yoked-clutch lever drive wheelchair. Over six daily training sessions, each involving about 134 training movements with their "useless" arm, the users gradually achieved a 3-fold increase in wheelchair speed on average, with a 4-6 fold increase for three of the participants...
July 2017: IEEE ... International Conference on Rehabilitation Robotics: [proceedings]
https://www.readbyqxmd.com/read/28806819/indicators-of-dysphagia-in-aged-care-facilities
#17
Dai Pu, Thomas Murry, May C M Wong, Edwin M L Yiu, Karen M K Chan
Purpose: The current cross-sectional study aimed to investigate risk factors for dysphagia in elderly individuals in aged care facilities. Method: A total of 878 individuals from 42 aged care facilities were recruited for this study. The dependent outcome was speech therapist-determined swallowing function. Independent factors were Eating Assessment Tool score, oral motor assessment score, Mini-Mental State Examination, medical history, and various functional status ratings...
August 14, 2017: Journal of Speech, Language, and Hearing Research: JSLHR
https://www.readbyqxmd.com/read/28806276/circulating-progenitor-cell-response-to-exercise-in-wheelchair-racing-athletes
#18
Grace M Niemiro, Thomas Edwards, J P Barfield, Joseph W Beals, Elizabeth M Broad, Robert W Motl, Nicholas A Burd, Lara A Pilutti, Michael De Lisio
INTRODUCTION: Circulating progenitor cells (CPCs) are a heterogeneous population of stem/progenitor cells in peripheral blood that participate in tissue repair. CPC mobilization has been well characterized in able-bodied persons, but has not been previously investigated in wheelchair racing athletes. The purpose of this study was to characterize CPC and CPC sub-population mobilization in elite wheelchair racing athletes in response to acute, upper-extremity aerobic exercise to determine if CPC responses are similar to ambulatory populations...
August 11, 2017: Medicine and Science in Sports and Exercise
https://www.readbyqxmd.com/read/28795657/body-system-effects-of-a-multi-modal-training-program-targeting-chronic-motor-complete-thoracic-spinal-cord-injury
#19
Katie Gant, Kathleen Nagle, Rachel Cowan, Edelle Field-Fote, Mark Nash, Jochen Kressler, Christine K Thomas, Mabelin Castellanos, Eva Widerstrom-Noga, Kimberly D Anderson
The safety and efficacy of pharmacologic and cellular transplantation strategies are currently being evaluated in people with spinal cord injury. In studies of people with chronic spinal cord injuries, it is thought that functional recovery will be best achieved when drug or cell therapies are combined with rehabilitation protocols. However, any functional recovery due to the therapy may be confounded by the conditioned state of the body and by training-induced effects on neuroplasticity. For this reason, we sought to investigate the effects of a multi-modal training program on several body systems...
August 10, 2017: Journal of Neurotrauma
https://www.readbyqxmd.com/read/28792791/differences-in-outcomes-between-the-joybar-control-and-standard-wheelchair-joystick-control-on-two-maneuverability-tasks-a-pilot-study
#20
Emma M Smith, Danelle Fuller, Hina Mahmood, William C Miller
PURPOSE: To determine if older adult, novice wheelchair users who drive a power wheelchair with a JoyBar control complete maneuverability tasks in less time and with less error than those who drive a power wheelchair with a standard joystick control. MATERIALS AND METHODS: A parallel randomized controlled trial design conducted at a medical rehabilitation and research centre with ambulatory older adults aged 60 and above (nā€‰=ā€‰27). The intervention was the JoyBar alternative wheelchair control...
August 9, 2017: Disability and Rehabilitation. Assistive Technology
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