Computer Simulation

161.

Freezing degrees of freedom under stress: kinematic evidence of constrained movement strategies.

The present study investigated the effect of psychological stress imposed on movement kinematics in a computer-simulated batting task involving a backward and forward swing of the forearm. The psychological stress was imposed by a mild electric stimulus ...
Takahiro Higuchi, Kuniyasu Imanaka, Toshiteru Hatayama (Hum Mov Sci, 200212)
freezing-degrees-freedom-under-stress-kinematic-evidence-constrained.asp

162.

22R-Hydroxycholesterol protects neuronal cells from beta-amyloid-induced cytotoxicity by binding to beta-amyloid peptide.

22R-hydroxycholesterol, a steroid intermediate in the pathway of pregnenolone formation from cholesterol, was found at lower levels in Alzheimers disease (AD) hippocampus and frontal cortex tissue specimens compared to age-matched controls. beta-Amyloid ...
Zhi-Xing Yao, Rachel C Brown, Gary Teper, Janet Greeson, Vassilios Papadopoulos (J Neurochem, 200212)
r-hydroxycholesterol-protects-neuronal-cells-beta-amyloid-induced.asp

163.

Face-, expert, and referent validity of the Xitact LS500 laparoscopy simulator.

BACKGROUND: This study was undertaken to establish face-, expert, and referent validity of the Xitact LS500; a virtual reality laparoscopic cholecystectomy simulator. METHODS: A four-page, 20-item structured questionnaire was presented to 120 surgeons ...
M Schijven, J Jakimowicz (Surg Endosc, 200212)
face-expert-referent-validity-xitact-ls-laparoscopy-simulator.asp

164.

Comparison of virtual and real electric powered wheelchair driving using a position sensing joystick and an isometric joystick.

There are limited interface options for electric powered wheelchairs, which results in the inability of some individuals to drive independently. In addition, the development of new interface technologies will necessitate the development of alternative ...
Rory A Cooper, Donald M Spaeth, Daniel K Jones, Michael L Boninger, Shirley G Fitzgerald, Songfeng Guo (Med Eng Phys, 200212)
comparison-virtual-real-electric-powered-wheelchair-driving-position.asp

165.

The benefits of 3D modelling and animation in medical teaching.

Three-dimensional models created using materials such as wax, bronze and ivory, have been used in the teaching of medicine for many centuries. Today, computer technology allows medical illustrators to create virtual three-dimensional medical models. This ...
Tim Vernon, Daniel Peckham (J Audiov Media Med, 200212)
benefits-d-modelling-animation-medical-teaching.asp

166.

Computing heading in the presence of moving objects: a model that uses motion-opponent operators.

Psychophysical experiments have shown that human heading judgments can be biased by the presence of moving objects. Here we present a theoretical argument that motion differences can account for the direction of bias seen in humans. We further examine ...
Constance S Royden (Vision Res, 200212)
computing-heading-presence-moving-objects-model-uses-motion-opponent.asp

167.

A new impact actuator using linear momentum exchange of inertia mass.

For self-controlled endoscopes, many kinds of systems have been proposed. Among these, pneumatic actuators show significant potential. However, existing actuators, such as those used in endoscopes, have many weak points. In particular, free movement ...
Hyun-Jin Min, Hyung-Jun Lim, Soo Hyun Kim (J Med Eng Technol, 200211-12)
new-impact-actuator-linear-momentum-exchange-inertia-mass.asp

168.

A computer assisted surgical trainer for transurethral resection of the prostate.

PURPOSE: We developed a realistic and reusable computer assisted surgical training system for transurethral resection of the prostate. MATERIALS AND METHODS: A disposable prostate model is housed in a model abdomen. A software program that provides a ...
P V S Kumar, M P S F Gomes, B L Davies, A G Timoney (J Urol, 200211)
computer-assisted-surgical-trainer-transurethral-resection-prostate.asp

169.

Randomized prospective blinded study validating acquistion of ureteroscopy skills using computer based virtual reality endourological simulator.

PURPOSE: Surgical simulation has emerged in the last decade as a potential tool for aiding acquisition of technical skills, including anesthesia protocols, trauma management, cardiac catheterization and laparoscopy. We evaluate and validate the use of a ...
James D Watterson, Darren T Beiko, James K Kuan, John D Denstedt (J Urol, 200211)
randomized-prospective-blinded-study-validating-acquistion.asp

170.

Simulating closed- and open-loop voluntary movement: a nonlinear control-systems approach.

In many recent human motor control models, including feedback-error learning and adaptive model theory (AMT), feedback control is used to correct errors while an inverse model is simultaneously tuned to provide accurate feedforward control. This popular ...
Paul R Davidson, Richard D Jones, John H Andreae, Harsha R Sirisena (IEEE Trans Biomed Eng, 200211)
simulating-closed-open-loop-voluntary-movement-nonlinear-control.asp