Spine Biomechanics

Chronic low back pain is a significant public health problem in industrialized society. The intact spine carries the upper body and external loads, allows motion in a physiological range and protects the spinal cord. These different demands necessitate a high degree of complexity with various sources for disorders and pain. The Julius Wolff Institute conducts research in order to counter pain causes and to further optimize the pain treatment.

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Invers Dynamic Models

Prevention and improvement of existing therapies

Inverse dynamic models were used to conclude from observed motions to forces and moments acting in the spine and at surrounding structures. These loads allow evaluation of the stress conditions in joints, joint cartilage, bone, muscles, tendons, and ligaments. Analyses can be performed for any static and dynamic load scenario during physical training or in daily routine.

The researches of our team aim to conclude from normal as well as from highly demanding daily activities to the loads in the spine. They intend to evolve methods for prevention and improvement of existing therapies.

For optical motion capturing we use the "Vicon" system. Small reflective marker balls were fixed on certain landmarks on the skin of the subjects. During the subject's motion in the laboratory cameras detect the marker positions.
Die im Labor aufgezeichneten Bewegungen werden anschließend auf das invers-dynamische Modell übertragen und die resultierenden Kräfte in Muskeln und Gelenken berechnet.

Invers-dynamisches Modell bei der Durchführung typischer Standardchoreographien: Flexion, Extension, Seitneigung und axialer Rotation. Die Animation zeigt die Aktivierung der verschiedenen Muskeln sowie die Gelenkkräfte im Bereich L4/L5.