Execution:
- The patient lies in prone position
- The patient’s shoulder is abducted to 90°, laterally rotated and the elbow flexed to 90°
- The patient is asked to horizontally abduct the arm while the examiner gives resistance
Positive Outcome: Weakness compared to the other side and/or muscle atrophy observed upon contraction
| Study | Reliability | Sn | Sp | LR+ | LR- |
| Ekstrom et al. (2003) | NA | NA | NA | NA | NA |
