Table 3.
Anatomical Neutral and Relative Scapular Anterior‐Posterior Orientations.
| Active Humeral Elevation Position | Digital Inclinometer Measures | Electromagnetic Tracking System Measures | ||
|---|---|---|---|---|
| Anatomic Neutral | Relative | Anatomic Neutral | Relative | |
| 68.68° | ‐11.75° | |||
| Rest | 0.00° | 0.00° | ||
| 30° | 4.45° | 1.88° | ||
| 45° | 7.38° | 2.29° | ||
| 60° | 9.98° | 2.75° | ||
| 90° | 12.00° | 7.56° | ||
| 120° | 20.06° | 12.73° | ||
Note: Values reflect the mean relative change in scapular AP tilt for all subjects at each humeral elevation position from anatomic neutral for the digital inclinometer and electromagnetic tracking system. The negative anatomic neutral trial for the electromagnetic tracking system reflects an anteriorly tilted scapula. Increases in relative values reflect movement of the scapula to a more posteriorly tilted orientation.