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Gymball - a portable and compact gyroscopic device was developed for hand rehabilitation. This pilot study validated the device’s design and assessed the prospect of using it for therapy. Specifically, the study focused on whether: (i) the gyroscopic torque, generated by the device, can passively ...
This study aims to present a method of quantifying regional load transfer between consecutive footsteps in typically developed children to determine the effect of the proceeding step on foot ground pressures during the subsequent step.
Orthotic insoles can be an effective way to alter gait mechanics to conservatively manage knee osteoarthritis (OA). Changes in plantar pressure distribution and comfort impact adherence to insole treatment but have not been investigated in insoles specific for knee OA. We evaluated differences in pl...
Electrical vestibular stimulation (EVS) can be used to manipulate the vestibular input to the medial gastrocnemius muscle (MG). The aims of this study were: 1) to identify the lowest noisy EVS amplitude that results in modulation of MG activity; 2) to identify whether a motor unit response to EVS is...
A coordinated pattern of multi-muscle activation is essential to produce efficient reaching trajectories. Disruption of these coordinated activation patterns, termed synergies, is evident following stroke and results in reaching deficits; however, preclinical investigation of this phenomenon has bee...
Muscle activity during periods of postural adjustments is responsible for maintaining stability and body orientation. Our results showed muscle activity during the periods of anticipatory and compensatory postural adjustments for the scapular muscles during upper limb tasks. We believe that the acti...
Patients who are candidates for transtibial amputation have a limb preservation option in the Intrepid Dynamic Exoskeletal Orthosis (IDEO). Power and work produced by structures distal to the knee are compared between these patient groups in this study. IDEOs and prosthetic ankle-foot devices are fo...
The shoulder joint is the most common site of musculoskeletal pain in people with spinal cord injuries who use manual wheelchairs. Current understanding of shoulder pathology in manual wheelchair users points to an etiology related to overuse of the shoulder joint that is not optimized for weight be...
Muscle weakness due to disuse could impair the ability of older adults to prevent a backward fall. A musculoskeletal model is thus being used to predict the effect of strength training of selected muscle groups on older adults’ ability to restore static balance after a recovery step from a backwar...
In patients with Diabetes, the accurate identification of plantar regions with abnormal loading is a crucial issue in the plantar ulcer prevention program[1,2]. We designed a peculiar mask to complement the validated anatomical mask based on the Oxford Foot Model (OFM) with a more specific forefoot ...
We performed a six-month longitudinal study addressing minimal shoes versus conventional shoes as daily footwear. Focussing on peak plantar pressures and on foot metrics, we did not find significant differences between the pre and post measurements.
In this study, we determined the relationship between muscle architecture and peak torque and total work produced by the plantarflexors during maximal effort isokinetic contractions. We measured resting fascicle length and pennation angle and calculated muscle thickness in the medial gastrocnemius u...
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A 12-hour work day produces changes in the cognitive performance of workers. The case of air traffic controllers without doubt is an occupation of high cognitive and security demands. Postural control is influenced by the cognitive state of people. In the present study, differences in spontaneous po...
Chiari type I malformations (Chiari I) are congenital deformities characterized by migration of the cerebellar tonsils through the foramen magnum. The condition is associated with headaches, chronic fatigue syndrome, orthostatic intolerance, and other neurologic syndromes. Despite patients’ descri...
Power-walking has an increasing popularity in fitness and rehab-programs, due to its expected lower impact forces. The study showed a lower impact forces than jogging and between 15% and 76% higher muscular activity than walking.
The (re)learning of motor skills relevant to real environments and tools should emphasize the ability to anticipate complex dynamics. In this novel paradigm for unstable interactive sonification (UNISON) participants learned to entrain the dynamics of a chaotic system through their arm movements. Im...
A method for identifying mechanical properties of arterial tissue in vivo is used to predict the stress state of the human abdominal aorta. The parameter identification method accounts for the arterial wall constituents, namely the isotropic non-collagenous material and the anisotropic collagen fibr...
Use of an adaptive treadmill enables natural variation in walking speed and may be beneficial for rehabilitation applications. This study investigates the differences in plantar flexor muscle force during walking with an adaptive treadmill versus a fixed speed treadmill. While walking at self-select...
The aim of this study was to identify differences in plantar pressure patterns in Dutch military recruits with lower leg complaints compared to recruits without any physical complains during their basic military training. Baseline plantar pressure measurements were performed in 1142 military recruit...
Owning to sufficient stiffness at room temperature, rapid shape memory ability when exposed to body temperature, in vivo stability and soft nature to matching the mechanical properties of soft tissue, poly(glycerol-dodecanoate) (PGD) is a promising biodegradable polymer which could be applied as sof...
The effects of hip arthroscopy on hip joint mechanics and cartilage health in patients with femoroacetabular impingement syndrome (FAIS) are not well understood. In our exploratory study, patients with FAIS exhibited abnormal hip joint mechanics both prior to and after hip arthroscopy, when compared...
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The purpose of this research study was to examine postural control strategies used by people who participate in boarding sports on stable and unstable surfaces. Eleven healthy young adults (6 F) with boarding experience and 13 controls (6 F) were recruited. Participants underwent 2 testing component...
Compliant fingers are essential for fine manipulation. Like a slender column, a compliant finger is prone to buckle when exerting fingertip forces. But, healthy human fingers rarely buckle. So, we investigated how the neuromuscular system stabilizes finger contacts. Stability may be a by-product of ...
Commercially available ankle prostheses are predominantly passive-elastic devices which cannot perform positive net work, and only produce about an eighth the power of the intact plantarflexors. To address this deficit, recent research has focused on the design of devices capable of supplying additi...
The results of this study suggest that ACL stiffness predicted from a combination of 3D ACL graft volume and signal intensity explains up to 80% of the variation in anterior tibial position at the time of contact during a one-leg hop-for-distance test in a cohort of ACL-reconstructed patients. This ...
We present a statistical shape model (SSM) for predicting cartilage morphology from bone, which may enable the rapid generation of cartilage morphology from sparse imaging data. A SSM was trained on 25 segmented MRIs of the knee. The bones of the SSM were fitted to raw segmented data from one test s...
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