Execution:
- The patient lies in prone position
- Abduct the shoulder to 120°, laterally rotate the shoulder, and flex the elbow to 90°
- The patient horizontally abducts the arm and give resistance against diagonal abduction
Positive Outcome: Patient is not able to resist your movement or muscle atrophy is observed upon contraction
| Study | Reliability | Sn | Sp | LR+ | LR- |
| Ekstrom et al. (2003) | NA | NA | NA | NA | NA |
