Searched for: department:"Biomechanical%5C%2BEngineering"
(1 - 20 of 253)

Pages

document
Campfens, S.F. (author), Zandvliet, S.B. (author), Meskers, C.G.M. (author), Schouten, A.C. (author), Van Putten, M.J.A.M. (author), Van der Kooij, H. (author)
Abstract The possibility to regain motor function after stroke depends on the intactness of motor and sensory pathways. In this study, we evaluated afferent sensory pathway information transfer and processing after stroke with the coherence between cortical activity and a position perturbation (position-cortical coherence, PCC). Eleven subacute...
journal article
document
Van der Krogt, M.M. (author), Bregman, D.J.J. (author), Wisse, M. (author), Doorenbosch, C.A.M. (author), Harlaar, J. (author), Collins, S.H. (author)
Children with cerebral palsy frequently experience foot dragging and tripping during walking due to a lack of adequate knee flexion in swing (stiff-knee gait). Stiff-knee gait is often accompanied by an overly flexed knee during stance (crouch gait). Studies on stiff-knee gait have mostly focused on excessive knee muscle activity during (pre...
journal article
document
Wentink, M. (author), Fischer, H. (author), Dankelman, J. (author), Stassen, L.P.S. (author), Wieringa, P.A. (author)
Purpose: To evaluate the effect of perspective distortion of wide-angle lenses in laparoscopes on hand-eye coordination during endoscopic manipulation. Methods: Sixteen subjects repeatedly performed a standardized positioning task in a pelvi-trainer under two conditions. The subjects had no prior experience with endoscopic manipulation. In one...
journal article 2002
document
Dodou, D. (author), Breedveld, P. (author), Wieringa, P.A. (author)
One of the main challenges in designing diagnostic devices able to move along the colon is their locomotion method. Generating friction without applying high normal forces is a key requirement in order to eliminate the risk of tissue damage. One possible solution is to generate friction by means of adhesive forces. For this reason, the device...
journal article 2006
document
Herder, J.L. (author), Vrijlandt, N. (author), Antonides, T. (author), Cloosterman, M. (author), Mastenbroek, P.L. (author)
This article describes the development of a mobile arm support for people with muscular diseases. The arm support is spring-balanced, with special attention on reduction of operating effort (high balancing quality and low friction), functionality (large range of motion), and aesthetics (inconspicuous design). The spring settings can be adjusted...
journal article 2006
document
Dankelman, J. (author), Grimbergen, C.A. (author), Stassen, H.G. (author)
journal article 2007
document
Dankelman, J. (author)
With the introduction of minimally invasive surgery (MIS), it became necessary to develop training methods to learn skills outside the operating room. Several training simulators have become commercially available, but fundamental research into the requirements for effective and efficient training in MIS is still lacking. Three aspects of...
journal article 2007
document
Chmarra, M.K. (author), Jansen, F.W. (author), Grimbergen, C.A. (author), Dankelman, J. (author)
Aims- Minimally invasive surgery (MIS) requires a high degree of eye–hand coordination from the surgeon. To facilitate the learning process, objective assessment systems based on analysis of the instruments’ motion are being developed. To investigate the influence of performance on motion characteristics, we examined goaloriented movements in a...
journal article 2007
document
Verdaasdonk, E.G.G. (author), Dankelman, J. (author), Lange, J.F. (author), Stassen, L.P.S. (author)
Background- Laparoscopic suturing is one of the most difficult tasks in endoscopic surgery, requiring extensive training. The aim of this study was to determine the transfer validity of knot-tying training on a virtual-reality (VR) simulator to a realistic laparoscopic environment. Methods- Twenty surgical trainees underwent basic eye–hand...
journal article 2007
document
Schouten, A.C. (author), De Vlugt, E. (author), Van Hilten, J.J. (author), Van der Helm, F.C. (author)
This study aimed to analyse the dynamic properties of the muscle spindle feedback system of shoulder muscles during a posture task. External continuous force disturbances were applied at the hand while subjects had to minimize their hand displacements. The results were analysed using two frequency response functions (FRFs) from which the model...
journal article 2008
document
De Winter, J.C.F. (author), Mulder, M. (author), Van Paassen, M.M. (author), Abbink, D.A. (author), Wieringa, P.A. (author)
Driver assistance systems that supply force feedback (FF) on the accelerator commonly use relative distance and velocity with respect to the closest lead vehicle in front of the own vehicle. This 1-D feedback might not accurately represent the situation and can cause unwanted step-shaped changes in the FFs during lateral maneuvers. To address...
journal article 2008
document
De Winter, J. (author), Mulder, M. (author), Van Paassen, M.M. (author), Abbink, D.A. (author), Wieringa, P.A. (author)
Driver assistance systems that supply force feedback (FF) on the accelerator commonly use relative distance and velocity with respect to the closest lead vehicle in front of the own vehicle. This 1-D feedback might not accurately represent the situation and can cause unwanted step-shaped changes in the FFs during lateral maneuvers. To address...
journal article 2008
document
Van den Wijngaard, J.P.H.M. (author), Kolyva, C. (author), Siebes, M. (author), Dankelman, J. (author), Van Gemert, M.J.C. (author), Piek, J.J. (author), Spaan, J.A.E. (author)
The subendocardium is most vulnerable to ischemia, which is ameliorated by relaxation during diastole and increased coronary pressure. Recent clinical techniques permit the measuring of subendocardial perfusion and it is therefore important to gain insight into how measurements depend on perfusion conditions of the heart. Using data from...
journal article 2008
document
Erden, M.S. (author), Komoto, H. (author), Van Beek, T.J. (author), D'Amelio, V. (author), Echavarria, E. (author), Tomiyama, T. (author)
This work is aimed at establishing a common frame and understanding of function modeling (FM) for our ongoing research activities. A comparative review of the literature is performed to grasp the various FM approaches with their commonalities and differences. The relations of FM with the research fields of artificial intelligence, design theory,...
journal article 2008
document
Dodou, D. (author), Van den Berg, M. (author), Van Gennip, J. (author), Breedveld, P. (author), Wieringa, P.A. (author)
A self-propelling colonoscopic device moving inside the colonic tube should be able to periodically grip safely to the colonic wall as well as to manipulate the generated friction. The feasibility of achieving high grip and friction manipulation by covering the device with mucoadhesive films is experimentally tested. More precisely, the...
journal article 2008
document
Hobbelen, D.G.E. (author), Wisse, M. (author)
Limit cycle walkers are bipeds that exhibit a stable cyclic gaitwithout requiring local controllability at all times during gait. A well-known example of limit cycle walking is McGeer’s “passive dynamic walking,” but the concept expands to actuated bipeds as involved in this study. One of the stabilizing effects in limit cycle walkers is the...
journal article 2008
document
Verdaasdonk, E.G. (author), Dankelman, J. (author), Lange, J.F. (author), Stassen, L.P.S. (author)
Background - It is desirable that surgical trainees are proficient in basic laparoscopic motor skills (eye–hand coordination). The present study evaluated the use of predefined proficiency criteria on a basic virtual reality (VR) simulator in preparation for a laparoscopic course on animal models. Methods - Twenty-eight surgical trainees who...
journal article 2008
document
Verdaasdonk, E.G.G. (author)
Laparoscopic surgery is one of the most important surgical innovations of the 20th century. Despite the well-known benefits for the patient, such as reduced pain, reduced hospital stay and quicker return to normal physical activities, there are also some drawbacks. Performing laparoscopic surgery requires specific psychomotor skills and...
doctoral thesis 2008
document
Chmarra, M.K. (author), Dankelman, J. (author), Van den Dobbelsteen, J.J. (author), Jansen, F.W. (author)
Background - Not much is known about the exact role offorce feedback in laparoscopy. This study aimed to determine whether force feedback influences movements of instruments during training in laparoscopic tasks and whether force feedback is required for training in basic laparoscopic force application tasks. Methods - A group of 19 gynecologic...
journal article 2008
document
Schouten, A.C. (author), De Vlugt, E. (author), Van der Helm, F.C.T. (author)
This study aimed to identify the functional contribution of reflexes to human motor control during posture maintenance. Continuous random force disturbances were applied at the hand while the subjects were instructed to minimize the deviation resulting from the force disturbances. The results were analyzed in the frequency domain with frequency...
journal article 2008
Searched for: department:"Biomechanical%5C%2BEngineering"
(1 - 20 of 253)

Pages