News
 

AnyBody Newsletter: Spine, foot, badminton, seating, events, publications

  • Foot model in progress
  • Spine model updates
  • World’s Best Badminton Racket
  • Webcasts
  • Vacancy: Clinical Early Stage Researcher (CESR) (SpineFX)
  • Using a computer model to bridge published experimental seated posture result
  • Data on the Move: Advancing FEA Design through Patient-Based Motion Analysis
  • Meet an AnyBuddy: Daniel Nolte
  • Conferences: Meet AnyBody at...
  • Publications: Muscle activities after lumbar surgery, Index finger

Foot model in progress

Our most recent contribution to the A-FOOTPRINT project is a detailed multisegmental kinematic foot model consisting of 26 segments representing all the foot bones and 26 joints connecting them. Next in this project comes now addition of ligaments and muscles to the model. The model will later be available from the AnyBody Managed Model Repository.

More information on the model and the project will be presented at the upcoming i-FAB 2010, i.e. the 2nd Congress of the International Foot and Ankle Biomechanics Community conference in Seattle, WA, by Scott Telfer of Glasgow Caledonian University. It's in Session 10 on Friday, Sept. 17, 12:00pm-12:45pm. Søren Tørholm, AnyBody Technology, will also be present at i-FAB. If you want to schedule a meeting with him, please contact us.

Spine model updates

Our part of our first delivery to the ongoing European SpineFX project is an lumbar spine model which has been updated with all major ligaments. As part of the model quality assurance process the updated model has shown excellent results when validated against available experimental data, cf. the graph. The updated spine model is planned for public release in the AnyBody Managed Model Repository in Q4 together with version 5 of the AnyBody Modeling System.

As always we are available to for on-line discussions how our model can be applied to your problems. We'll also be attending several spine conferences during the next few months, should you prefer to meet us personally. Please contact us for a 1-on-1 appointment at  either Eurospine in Vienna, NASS in Orlando, or the ASTM Symposium on Static and Dynamic Spinal Implants in San Antonio.


World’s Best Badminton Racket
Maxine Kwan will defend her Ph.D. thesis on “Designing the World’s Best Badminton Racket” at 1pm on September 22nd at the Department for Mechanical and Manufacturing Engineering at Aalborg University. The opponents for the defense will be Prof. Federico Casolo, Dr. Mark King, and Dr. Uwe Kersting.

Maxine has used AnyBody extensively to process motion capture data and resolve the fine details of racket dynamics during the very fast badminton strokes, and she has authored four journal papers in the process of which two are published and two are in review. Her published papers are:
(1) Kwan, M. M. S. et al. (2010): Measurement of badminton racket deflection during a stroke. Sports Engineering. 12, 143-153. (2) Kwan, M. M. S. & Rasmussen, J. (2010): The Importance of Being Elastic: Deflection of a Badminton Racket During a Stroke. Journal of Sports Sciences. 28, 505-511.

Maxine’s work has several important implications both for understanding stroke techniques and improving racket design, the latter of which will be put to good use by the industrial sponsor of the project, Forza.


Webcasts
Sep 21: Musculoskeletal Loads within the Rats Hind Limb.
The rat is of increasing importance for experimental studies on fracture healing. The healing outcome of long bone fractures is strongly influenced by mechanical factors, such as the interfragmentary movement. This movement depends on the stability of the fracture fixation and the musculoskeletal loads. The fixation stability can be easily determined through in vitro tests, however little is known about the loads in rats. This webcast will present the development of an inverse-dynamic model of the rats hindlimb using AnyBody to be able to estimate the internal loads inside the rats femur during gait.
Speaker: Tim Wehner, Inst. of Orthopaedic Research and Biomechanics, University of Ulm, Germany.

Oct 28: Modeling techniques in AnyBody.
Nothing describes software better than watching it being used. In this webcast, one of the inventors of the AnyBody Modeling System, Prof. John Rasmussen, demonstrates the interactive modeling techniques on the system by live development of a model. The webcast is a great introduction for new or prospective users, and even if you are an experienced AnyBuddy, chances are that you will see a useful trick or two that you did not know about.
Speaker: Prof. John Rasmussen, Aalborg University.


Vacancy: Clinical Early Stage Researcher (CESR) (SpineFX)
University of Leeds, UK, is looking for a medical graduate with an interest in spinal neuro- or orthopaedic surgery to work on augmentation technology for the osteoporotic bone. View the full SpineFX job description and apply here.


Using a computer model to bridge published experimental seated posture results
AnyBuddy Christian Gammelgaard Olesen participated in the 13th Annual European Pressure Ulcer Meeting organized by the European Pressure Ulcer Advisory Panel (EPUAP) in Birmingham recently and won the Best Student Presentation Award for his work “Using a Computer Model to Bridge Published Experimental Seated Posture Results”. Christian uses an AnyBody model of a wheelchair user to predict forces between the wheelchair seat and the buttocks with special emphasis on shear forces. His models are experimentally validated, and they allow prediction of possibly ulcer-provoking forces as a function of chair adjustments and body anthropometry. The photo shows Christian receiving the award from Dr. Cees Oomens, a leading expert in pressure ulcers.

Data on the Move: Advancing FEA Design through Patient-Based Motion Analysis
Watch ANSYS, AnyBody Technology, and Materialise softwares working individually and in combination to bring a new dimension to orthopedic device design and analysis.

Incorporating patient-based joint geometries and transient joint kinematics brings many benefits to the orthopedic R&D process. Combining these options with finite element analysis facilitates a number of factors that are critical to design and R&D.

When: October 8, 2010 from 8:30 AM – 1:30 PM (Lunch will be served from 12:30 PM – 1:30 PM).

Don't miss this free seminar. Register and view the agenda here.

Meet an AnyBuddy: Daniel Nolte
Daniel Nolte, 30, is a software developer in AnyBody Technology. He got his diploma in mathematics for the University of Ulm. Afterwards he worked as a PhD student at the Institute of Numerical Mathematics and the Scientific Computing Center of the University of Ulm.

Daniels research involved simulation and optimization of fracture healing and in musculoskeletal modeling, especially the calculation of antagonistic muscle forces. In 2010, he joined AnyBody Technology as part of the development  team. He now lives in Aalborg, Denmark, about 10 km from the office. In his spare time, he enjoys sport activities like running and cycling.

 

Conferences: Meet AnyBody at...
i-FAB 2010, 2nd Congress of the International Foot and Ankle Biomechanics Community in Seattle, Washington, Sep 16-18
Scott Telfer of Glasgow Caledonian University will present A-FOOTPRINT project status including foot model status in Session 10 on Friday, Sept. 17, 12:00pm-12:45pm.

IUTAM Symposium on Analysis and Simulation of Human Motion, Leuven, Belgium, Sep 13-15
Dr. Mark de Zee, a senior member of the AnyBody Research Project team at Aalborg University, will give an invited lecture in the Personalized Musculoskeletal Modeling session on Sep. 13 at 15:15. The title is Validation of musculoskeletal models: the importance of trend validations (co-authored with Morten E. Lund, Cédric Schwartz, Christian G. Olesen, and John Rasmussen).

Eurospine 2010, Vienna, Austria, Sep 15-17
Both our spine experts Sebastian Dendorfer and Pavel Galibarov will be attending this years Eurospine. Present will also be other contributors to the SpineFX project. If you want to schedule a meeting with Sebastian and Pavel, please contact us

NASS, 25th Annual Meeting of the North American Spine Society, Orlando, FL, Oct 5-9
We'll also be at NASS to meet our North American clients. If you want to schedule a meeting with us in Orlando, please contact us.

Orthopedics seminar with Materialise and ANSYS: Data on the Move: Advancing FEA Design through Patient-Based Motion Analysis, Warsaw, IN, Oct 8.
Don't miss this FREE seminar! Click here to register.

DGU 2010, Deutscher Kongress für Orthopädie und Unfallchirurgie, Oct 26-29, Berlin, Germany.

ANSYS Conference & 28. CADFEM Users´ Meeting, Nov 3-5, Aachen, Germany.
Sebastian Dendorfer will present in the AnyBody Users session on Thursday 4th, 16:20-18:00.

16 Nov: ASTM Symposium on Static and Dynamic Spinal Implants, San Antonio, TX
John Rasmussen will present a poster The contribution of muscle forces to spinal loads (coauthors: S. Dendorfer, M. de Zee). Read the abstract here.


Publications
Using the spine model in the AnyBody Managed Model Repository Lacey Bresnahan and coworkers at Northwestern University in Chicago, IL, show that the reduction in muscle cross-sectional area as a result of posterior lumbar surgery at L3–L4 and L4–L5 results in a change in trunk muscle activity where the greatest change occurs during axial rotation and lateral bending. The results suggest that preservation of the posterior paraspinal musculature results in greater preservation of the normal muscle activity than traditional open techniques:
L. Bresnahan, R.G. Fessler, R.N. Natarajan (2010): Evaluation of Change in Muscle Activity as a Result of Posterior Lumbar Spine Surgery Using a Dynamic Modeling System. Spine 35, E761–E767.

John Wu and coworkers at the National Institute for Occupational Safety and Health, Morgantown, WV, working with Kai-Nan An at Mayo Clinic in Mayo Clinic, Rochester, MN, add further detail to their AnyBody hand model:
J.Z. Wu, K.-N. An, R.G. Cutlip, R.G. Dong (2010): A practical biomechanical model of the index finger simulating the kinematics of the muscle/tendon excursions. Bio-Medical Materials and Engineering 20, 89–97.


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