Table 2.

Mathematical representation and detailed description for each selected scenario.

Scenario No.	Constraints	Detailed description
1	$Tx=Ty=Tz\ne 0Rx=Ry=Rz\ne 0$	• Except for the clavicle, free behavior owing to there being no constraints on the SC joints
2	—	• Relationship between the clavicle and sternum was established. • Both acromial ends of the clavicle were fixed.
3	$Ty=Tz\ne 0,Tx=0Ry=Rz=0,Rx\ne 0$	• SC joint’s x-axis translation and y- and z-axis rotation were constrained. • The remaining behavior was unrestricted.
4	$Tx=Tz\ne 0,Ty=0Rx=Rz=0,Ry\ne 0$	• SC joint’s y-axis translation and x- and z-axis rotation were constrained. • The remaining behavior was unrestricted.
5	$Tx=Ty\ne 0,Tz=0Rx=Ry=0,Rz\ne 0$	• SC joint’s z-axis translation and x- and y-axis rotation were constrained. • The remaining behavior was unrestricted.
6	$Tx=Ty=Tz=0Rx=Ry=Rz=0$	• Except for the clavicle, the SC joints were constrained using a fixed condition.

Note: Tx, Ty, and Tz translate in the direction of each axis; Rx, Ry, and Rz rotate around each axis.