Feb 12, 2019

Webinar: Muscle and Ligament Model of the Head and Neck to Study Physiological Motions & Dynamic Impacts

Learn about model updates, their impact on physiologically relevant motion simulations and dynamic impact loading scenarios, and potential future directions for improvement and application

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Details

Title: Muscle and Ligament Model of the Head and Neck to Study Physiological Motions & Dynamic Impacts
Speakers: Calvin Kuo, The University of British Columbia and Jon Mortensen, University of Utah
Time: Tuesday, February 12, 2019 at 10:00 a.m. Pacific Standard Time

Abstract

The head and neck is a complex musculoskeletal system comprised of high degree of freedom kinematics, redundant muscles, and passive structures. This complexity makes reproducing physiologically relevant motions and dynamic head impacts difficult in simulation platforms. Building on a model developed by Vasavada, recent work has added cervical vertebrae inertial properties, updated muscle properties, and modeled rate-dependent cervical spine ligaments. Updated muscle properties and the important addition of hyoid flexor muscles provide realistic neck strength in principle directions and the capability to simulate physiologically relevant motions in OpenSim, particularly in simulations of flexion. The addition of rate-dependent cervical spine ligaments provides the capability of simulating passive head and neck stability to external disturbances, such as high severity impacts commonly seen in American football. In this webinar, we will discuss the model updates, their impact on physiologically relevant motion simulations and dynamic impact loading scenarios, and potential future directions for improvement and application.

You can learn more and access the resources described in the webinar by visiting SimTK:

• Mortensen model with HYOID muscles: https://simtk.org/projects/neckdynamics
• Head impact experimental data + Kuo model with rate-dependent ligaments: https://simtk.org/projects/kuo-head-neck
• Tool for modeling co-activation muscle patterns (coming soon). Sign up for the project mailing list to be notified when the tool is available: https://simtk.org/mail/index.php?group_id=1608

The following publications also provide more details about topics discussed in the webinar:

• Spinal constraint modulates head instantaneous center of rotation and dictates head angular motion
• The inclusion of hyoid muscles improve moment generating capacity and dynamic simulations in musculoskeletal models of the head and neck
• Exploring novel objective functions for simulating muscle coactivation in the neck