Overview
The shoulder 9090 assessment evaluates internal and external rotation range of motion in the shoulder joint with the arm positioned at 90 degrees of abduction and 90 degrees of elbow flexion. This assessment provides valuable information about shoulder mobility and function.Instructions
Dimensions
Required inputs for processing:- Handedness: the side [‘left’,‘right’] performing the movement
Events
| Event | Description | Column Name |
|---|---|---|
| Start | Frame of movement start | |
| MER | Frame of maximum external rotation | |
| MIR | Frame of maximum internal rotation |
Discrete Metrics
| Metric | Units | Description | Column Name |
|---|---|---|---|
| MERAngle | degrees | Maximum External Rotation angle | “ |
| MIRAngle | degrees | Maximum Internal Rotation angle | “ |
| HorizontalAbductionCompMER | - | Horizontal abduction compensation at MER (1 if > 30°, -1 if < -30°) | “ |
| HorizontalAbductionCompMIR | - | Horizontal abduction compensation at MIR (1 if > 30°, -1 if < -30°) | “ |
| SideBendCompMER | - | Side bend compensation at MER (1 if > 20°, -1 if < -20°) | “ |
| SideBendCompMIR | - | Side bend compensation at MIR (1 if > 20°, -1 if < -20°) | “ |
| ElbowHikeCompMER | - | Elbow hike compensation at MER (1 if > 0.05m, -1 if < -0.05m) | “ |
| ElbowHikeCompMIR | - | Elbow hike compensation at MIR (1 if > 0.05m, -1 if < -0.05m) | “ |
| MERFunctional | - | Whether MER is functional (> 90°) | shoulder_9090_functional |
Notes
- MER is detected using peak detection with 30° prominence
- MIR is detected using peak detection with 30° prominence on inverted signal
- Start event is detected by finding a window of 30 frames where the shoulder rotation difference is less than 0.5 degrees
- Functional MER is defined as > 90°