Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Loading conditions applied to the combined model. To simulate stance, a 400 N follower load and 500 N body weight were applied; a 10 Nm moment was added to simulate flexion/extension, left and right lateral bending, and left and right axial rotation
