Computer models of the human body can provide significant insight to understanding how the body works as well as pathologies. My work in computational shoulder biomechanics has included many areas of modeling including the assessment, validation, and improvement of computational shoulder models. My early work included comparing the in silico-estimated moment arms from various shoulder models to those measured from cadaveric specimens. From there, I have worked on a variety of projects, including estimating the muscle force-activation relationship, optimizing and improving the efficiency of model moment arm estimation, and developing an integer programming model for shoulder rehabilitation.
The latest major project I worked on was the development of a 3D finite element model of the glenoid labrum. This model was based on the geometry from a human cadaver, where the glenoid, humerus, and labrum were scanned with a microCT machine. The 3-dimensional models of the hard and soft tissues were created using a variety of modeling programs, and finite element modeling was done using ABAQUS. The goal of this project was to determine the effects of superior humeral head migration on the labrum. The simulations we performed were able to give us an idea about the stresses and strains within the labrum during humeral migration, as well as at the glenoid/labrum interface.
Gatti CJ, Maratt JD, Palmer ML, Hughes RE, and Carpenter JE, 2010.
Development and validation of a finite element model of the superior glenoid labrum.
Annals of Biomedical Engineering 38(12): 3766-3776.
Gatti CJ and Hughes RE, 2009.
Optimization of muscle wrapping objects using simulated annealing.
Annals of Biomedical Engineering 37(7): 1342-1347.
Gatti CJ, Scibek J, Svintsitski O, Carpenter JE, and Hughes RE, 2008.
An integer programming model for optimizing shoulder rehabilitation.
Annals of Biomedical Engineering 36(7): 1242-1253.
Flieg N.G., Gatti CJ, Doro LC, Langenderfer JE, Carpenter JE, and Hughes RE, 2008.
A stochastic analysis of glenoid inclination angle and superior migration of the humeral head.
Clinical Biomechanics 23(5): 554-561.
Gatti CJ, Doro LC, Langenderfer JE, Mell AG, Maratt JD, Carpenter JE, and Hughes RE, 2008.
Evaluation of three methods for determining EMG-muscle force parameter estimates for the shoulder muscles.
Clinical Biomechanics 23(2): 166-174.
Gatti CJ, Dickerson C, Chadwick EKJ, Mell AG, and Hughes RE, 2007.
Comparison of model-predicted and measured moment arms for the rotator cuff muscles.
Clinical Biomechanics 22(6): 639-644.