Table 2: Angle orientation decomposition sequences

Segment Axis of Rotation Angle
Scapula
Rotation 1
Rotation 2
Rotation 3

Shoulder
Rotation 1
Rotation 2
Rotation 3

Y
X'
Z"


Y
X'
Y"

Internal (Protraction) [+]/External Rotation (Retraction)[-]*
Upward [+]/Downward Rotation [-]
Anterior [-]/Posterior Tilt [+]


Plane of Elevation [0=Abduction; 90=Flexion]
Elevation
Internal Rotation [+]/External Rotation [-]

*Prime ['] and double prime ["] notations represent previously rotated axes due to the rotation of the local coordinate system resulting in all axes within that system being rotated.